DOM Standard

DOM Standard
DOM
Living Standard — Last Updated
15 March 2026
Participate:
GitHub whatwg/dom
new issue
open issues
Chat on Matrix
Commits:
GitHub whatwg/dom/commits
Snapshot as of this commit
@thedomstandard
Tests:
web-platform-tests dom/
ongoing work
Translations
(non-normative)
简体中文
한국어
Abstract
DOM defines a platform-neutral model for events, aborting activities, and node trees.
1.
Infrastructure
This specification depends on the Infra Standard.
[INFRA]
Some of the terms used in this specification are defined in
Encoding
Selectors
Trusted Types
Web IDL
XML
, and
Namespaces in XML
[ENCODING]
[SELECTORS4]
[TRUSTED-TYPES]
[WEBIDL]
[XML]
[XML-NAMES]
When extensions are needed, the DOM Standard can be updated accordingly, or a new standard
can be written that hooks into the provided extensibility hooks for
applicable specifications
1.1.
Trees
tree
is a finite hierarchical tree structure. In
tree order
is preorder, depth-first traversal of a
tree
An object that
participates
in a
tree
has a
parent
, which is either
null or an object, and has
children
, which is an
ordered set
of objects. An object
whose
parent
is object
is a
child
of
The
root
of an object is itself, if its
parent
is null, or else it is the
root
of its
parent
. The
root
of a
tree
is any object
participating
in that
tree
whose
parent
is null.
An object
is called a
descendant
of an object
, if
either
is a
child
of
or
is a
child
of an object
that is a
descendant
of
An
inclusive descendant
is an
object or one of its
descendants
An object
is called an
ancestor
of an object
if and only if
is a
descendant
of
An
inclusive ancestor
is an object
or one of its
ancestors
An object
is called a
sibling
of
an object
, if and only if
and
share the same non-null
parent
An
inclusive sibling
is an object or
one of its
siblings
An object
is
preceding
an
object
if
and
are in the same
tree
and
comes before
in
tree order
An object
is
following
an
object
if
and
are in the same
tree
and
comes after
in
tree order
The
first child
of an object is its first
child
or null if it has no
children
The
last child
of an object is its last
child
or null if it has no
children
The
previous sibling
of an object is
its first
preceding
sibling
or null if it has no
preceding
sibling
The
next sibling
of an object is its
first
following
sibling
or null if it has no
following
sibling
The
index
of an object is its number of
preceding
siblings
, or 0 if it has none.
1.2.
Ordered sets
The
ordered set parser
takes a string
input
and then runs these steps:
Let
inputTokens
be the result of
splitting
input
on ASCII whitespace
Let
tokens
be a new
ordered set
For each
token
of
inputTokens
append
token
to
tokens
Return
tokens
The
ordered set serializer
takes a
set
and returns the
concatenation
of
set
using U+0020 SPACE.
1.3.
Selectors
To
scope-match a selectors string
given a string
selectors
against a
node
node
Let
selector
be the result of
parse a selector
selectors
[SELECTORS4]
If
selector
is failure, then
throw
a "
SyntaxError
DOMException
Return the result of
match a selector against a tree
with
selector
and
node
’s
root
using
scoping root
node
[SELECTORS4]
Support for namespaces within selectors is not planned and will not be added.
1.4.
Name validation
string
is a
valid namespace prefix
if its
length
is at least 1 and it
does not contain
ASCII whitespace
, U+0000 NULL, U+002F (/), or U+003E (>).
string
is a
valid attribute local name
if its
length
is at least 1
and it does not contain
ASCII whitespace
, U+0000 NULL, U+002F (/), U+003D (=), or U+003E (>).
string
name
is a
valid element local name
if the following steps return true:
If
name
’s
length
is 0, then return false.
If
name
’s 0th
code point
is an
ASCII alpha
If
name
contains
ASCII whitespace
, U+0000 NULL, U+002F (/), or U+003E (>), then
return false.
Return true.
If
name
’s 0th
code point
is not U+003A (:), U+005F (_), or in the range U+0080
to U+10FFFF, inclusive, then return false.
If
name
’s subsequent
code points
, if any, are not
ASCII alphas
ASCII digits
U+002D (-), U+002E (.), U+003A (:), U+005F (_), or in the range U+0080 to U+10FFFF, inclusive, then
return false.
Return true.
This concept is used to validate
element
local names
, when
constructed by DOM APIs. The intention is to allow any name that is possible to construct using the
HTML parser (the branch where the first
code point
is an
ASCII alpha
), plus some additional
possibilities. For those additional possibilities, the ASCII range is restricted for historical
reasons, but beyond ASCII anything is allowed.
The following JavaScript-compatible regular expression is an implementation of
valid element local name
/^(?:[A-Za-z][^\0\t\n\f\r\u0020/>]*|[:_\u0080-\u{10FFFF}][A-Za-z0-9-.:_\u0080-\u{10FFFF}]*)$/u
string
is a
valid doctype name
if it does not contain
ASCII whitespace
U+0000 NULL, or U+003E (>).
The empty string is a
valid doctype name
To
validate and extract
namespace
and
qualifiedName
, given a
context
If
namespace
is the empty string, then set it to null.
Let
prefix
be null.
Let
localName
be
qualifiedName
If
qualifiedName
contains a U+003A (:):
Set
prefix
to the part of
qualifiedName
before the first U+003A (:).
Set
localName
to the part of
qualifiedName
after the first U+003A (:).
If
prefix
is not a
valid namespace prefix
, then
throw
an
InvalidCharacterError
DOMException
Assert
prefix
is either null or a
valid namespace prefix
If
context
is "
attribute
" and
localName
is not a
valid attribute local name
, then
throw
an "
InvalidCharacterError
DOMException
If
context
is "
element
" and
localName
is not a
valid element local name
, then
throw
an "
InvalidCharacterError
DOMException
If
prefix
is non-null and
namespace
is null, then
throw
NamespaceError
DOMException
If
prefix
is "
xml
" and
namespace
is not the
XML namespace
, then
throw
a "
NamespaceError
DOMException
If either
qualifiedName
or
prefix
is "
xmlns
" and
namespace
is not the
XMLNS namespace
, then
throw
NamespaceError
DOMException
If
namespace
is the
XMLNS namespace
and neither
qualifiedName
nor
prefix
is "
xmlns
", then
throw
a "
NamespaceError
DOMException
Return (
namespace
prefix
localName
).
Various APIs in this specification used to validate namespace prefixes, attribute local names,
element local names, and doctype names more strictly. This was done in a way that aligned with
various XML-related specifications. (Although not all rules from the those specifications were
enforced.)
This was found to be annoying for web developers, especially since it meant there were some
names that could be created by the HTML parser, but not by DOM APIs. So, the validations have been
loosened to just those described above.
2.
Events
2.1.
Introduction to "DOM Events"
Throughout the web platform
events
are
dispatched
to objects to signal an
occurrence, such as network activity or user interaction. These objects implement the
EventTarget
interface and can therefore add
event listeners
to observe
events
by calling
addEventListener()
obj
addEventListener
"load"
imgFetched
function
imgFetched
ev
// great success
Event listeners
can be removed
by utilizing the
removeEventListener()
method, passing the same arguments.
Alternatively,
event listeners
can be removed by passing an
AbortSignal
to
addEventListener()
and calling
abort()
on the controller
owning the signal.
Events
are objects too and implement the
Event
interface (or a derived interface). In the example above
ev
is the
event
ev
is
passed as an argument to the
event listener
’s
callback
(typically a JavaScript Function as shown above).
Event listeners
key off the
event
’s
type
attribute value
("
load
" in the above example). The
event
’s
target
attribute value returns the
object to which the
event
was
dispatched
obj
above).
Although
events
are typically
dispatched
by the user agent
as the result of user interaction or the completion of some task, applications can
dispatch
events
themselves by using what are commonly known as synthetic events:
// add an appropriate event listener
obj
addEventListener
"cat"
function
process
detail
})
// create and dispatch the event
var
event
new
CustomEvent
"cat"
"detail"
"hazcheeseburger"
true
}})
obj
dispatchEvent
event
Apart from signaling,
events
are
sometimes also used to let an application control what happens next in an
operation. For instance as part of form submission an
event
whose
type
attribute value is
submit
" is
dispatched
. If this
event
’s
preventDefault()
method is
invoked, form submission will be terminated. Applications who wish to make
use of this functionality through
events
dispatched
by the application
(synthetic events) can make use of the return value of the
dispatchEvent()
method:
if
obj
dispatchEvent
event
))
// event was not canceled, time for some magic
When an
event
is
dispatched
to an object that
participates
in a
tree
(e.g., an
element
), it can reach
event listeners
on that object’s
ancestors
too. Effectively, all the object’s
inclusive ancestor
event listeners
whose
capture
is true are invoked, in
tree order
. And then, if
event
’s
bubbles
is true, all the object’s
inclusive ancestor
event listeners
whose
capture
is false
are invoked, now in reverse
tree order
Let’s look at an example of how
events
work in a
tree

html
head
title
Boring example
title
head
body
Hello
span
id
world
span
script
function
test
debug
target
currentTarget
eventPhase
document
addEventListener
"hey"
test
capture
true
})
document
body
addEventListener
"hey"
test
var
ev
new
Event
"hey"
bubbles
true
})
document
getElementById
"x"
).
dispatchEvent
ev
script
body
html
The
debug
function will be invoked twice. Each time the
event
’s
target
attribute value will be the
span
element
. The first time
currentTarget
attribute’s value will be the
document
, the second time the
body
element
eventPhase
attribute’s value switches from
CAPTURING_PHASE
to
BUBBLING_PHASE
. If an
event listener
was registered
for the
span
element
eventPhase
attribute’s value would have
been
AT_TARGET
2.2.
Interface
Event
[Exposed=*]
interface
Event
constructor
DOMString
type
optional
EventInit
eventInitDict
= {});
readonly
attribute
DOMString
type
readonly
attribute
EventTarget
target
readonly
attribute
EventTarget
srcElement
; // legacy
readonly
attribute
EventTarget
currentTarget
sequence
EventTarget
composedPath
();
const
unsigned
short
NONE
= 0;
const
unsigned
short
CAPTURING_PHASE
= 1;
const
unsigned
short
AT_TARGET
= 2;
const
unsigned
short
BUBBLING_PHASE
= 3;
readonly
attribute
unsigned
short
eventPhase
undefined
stopPropagation
();
attribute
boolean
cancelBubble
; // legacy alias of .stopPropagation()
undefined
stopImmediatePropagation
();
readonly
attribute
boolean
bubbles
readonly
attribute
boolean
cancelable
attribute
boolean
returnValue
; // legacy
undefined
preventDefault
();
readonly
attribute
boolean
defaultPrevented
readonly
attribute
boolean
composed

LegacyUnforgeable
readonly
attribute
boolean
isTrusted
readonly
attribute
DOMHighResTimeStamp
timeStamp
undefined
initEvent
DOMString
type
optional
boolean
bubbles
false
optional
boolean
cancelable
false
); // legacy
};
dictionary
EventInit
boolean
bubbles
false
boolean
cancelable
false
boolean
composed
false
};
An
Event
object is simply named an
event
. It allows for
signaling that something has occurred, e.g., that an image has completed downloading.
potential event target
is null or an
EventTarget
object.
An
event
has an associated
target
(a
potential event target
). Unless stated otherwise it is null.
An
event
has an associated
relatedTarget
(a
potential event target
). Unless stated otherwise it is null.
Other specifications use
relatedTarget
to define a
relatedTarget
attribute.
[UIEVENTS]
An
event
has an associated
touch target list
(a
list
of zero or more
potential event targets
). Unless stated otherwise it is the
empty list.
The
touch target list
is for the exclusive use of defining the
TouchEvent
interface and related interfaces.
[TOUCH-EVENTS]
An
event
has an associated
path
. A
path
is a
list
of
structs
. Each
struct
consists of an
invocation target
(an
EventTarget
object), an
invocation-target-in-shadow-tree
(a boolean), a
shadow-adjusted target
(a
potential event target
), a
relatedTarget
(a
potential event target
), a
touch target list
(a
list
of
potential event targets
), a
root-of-closed-tree
(a boolean), and
slot-in-closed-tree
(a boolean). A
path
is initially
the empty list.
event
= new
Event
type
[,
eventInitDict
])
Returns a new
event
whose
type
attribute value is set to
type
. The
eventInitDict
argument
allows for setting the
bubbles
and
cancelable
attributes via object
members of the same name.
event
type
Returns the type of
event
, e.g.
click
", "
hashchange
", or
submit
".
event
target
Returns the object to which
event
is
dispatched
(its
target
).
event
currentTarget
Returns the object whose
event listener
’s
callback
is currently being
invoked.
event
composedPath()
Returns the
invocation target
objects of
event
’s
path
(objects on which listeners will be invoked), except for any
nodes
in
shadow trees
of which the
shadow root
’s
mode
is "
closed
" that are not reachable from
event
’s
currentTarget
event
eventPhase
Returns the
event
’s phase, which is one of
NONE
CAPTURING_PHASE
AT_TARGET
, and
BUBBLING_PHASE
event
stopPropagation
()
When
dispatched
in a
tree
, invoking this method prevents
event
from reaching any objects other than the current object.
event
stopImmediatePropagation
()
Invoking this method prevents
event
from reaching
any registered
event listeners
after the current one finishes running and, when
dispatched
in a
tree
, also prevents
event
from reaching any
other objects.
event
bubbles
Returns true or false depending on how
event
was initialized. True if
event
goes through its
target
’s
ancestors
in reverse
tree order
; otherwise false.
event
cancelable
Returns true or false depending on how
event
was initialized. Its return
value does not always carry meaning, but true can indicate that part of the operation
during which
event
was
dispatched
, can be canceled by invoking the
preventDefault()
method.
event
preventDefault
()
If invoked when the
cancelable
attribute value is true, and while executing a
listener for the
event
with
passive
set to false, signals to
the operation that caused
event
to be
dispatched
that it needs to be canceled.
event
defaultPrevented
Returns true if
preventDefault()
was invoked successfully to indicate cancelation;
otherwise false.
event
composed
Returns true or false depending on how
event
was initialized. True if
event
invokes listeners past a
ShadowRoot
node
that is the
root
of its
target
; otherwise false.
event
isTrusted
Returns true if
event
was
dispatched
by the user agent, and
false otherwise.
event
timeStamp
Returns the
event
’s timestamp as the number of milliseconds measured relative to
the occurrence.
The
type
attribute must return the value it was
initialized to. When an
event
is created the attribute must be initialized to the empty
string.
The
target
getter steps are to return
this
’s
target
The
srcElement
getter steps are to return
this
’s
target
The
currentTarget
attribute must return the value it
was initialized to. When an
event
is created the attribute must be initialized to null.
The
composedPath()
method steps are:
Let
composedPath
be an empty
list
Let
path
be
this
’s
path
If
path
is empty
, then return
composedPath
Let
currentTarget
be
this
’s
currentTarget
attribute value.
Assert
currentTarget
is an
EventTarget
object.
Append
currentTarget
to
composedPath
Let
currentTargetIndex
be 0.
Let
currentTargetHiddenSubtreeLevel
be 0.
Let
index
be
path
’s
size
− 1.
While
index
is greater than or equal to 0:
If
path
index
]'s
root-of-closed-tree
is true,
then increase
currentTargetHiddenSubtreeLevel
by 1.
If
path
index
]'s
invocation target
is
currentTarget
, then set
currentTargetIndex
to
index
and
break
If
path
index
]'s
slot-in-closed-tree
is true,
then decrease
currentTargetHiddenSubtreeLevel
by 1.
Decrease
index
by 1.
Let
currentHiddenLevel
and
maxHiddenLevel
be
currentTargetHiddenSubtreeLevel
Set
index
to
currentTargetIndex
− 1.
While
index
is greater than or equal to 0:
If
path
index
]'s
root-of-closed-tree
is true,
then increase
currentHiddenLevel
by 1.
If
currentHiddenLevel
is less than or equal to
maxHiddenLevel
, then
prepend
path
index
]'s
invocation target
to
composedPath
If
path
index
]'s
slot-in-closed-tree
is true:
Decrease
currentHiddenLevel
by 1.
If
currentHiddenLevel
is less than
maxHiddenLevel
, then set
maxHiddenLevel
to
currentHiddenLevel
Decrease
index
by 1.
Set
currentHiddenLevel
and
maxHiddenLevel
to
currentTargetHiddenSubtreeLevel
Set
index
to
currentTargetIndex
+ 1.
While
index
is less than
path
’s
size
If
path
index
]'s
slot-in-closed-tree
is true,
then increase
currentHiddenLevel
by 1.
If
currentHiddenLevel
is less than or equal to
maxHiddenLevel
, then
append
path
index
]'s
invocation target
to
composedPath
If
path
index
]'s
root-of-closed-tree
is true:
Decrease
currentHiddenLevel
by 1.
If
currentHiddenLevel
is less than
maxHiddenLevel
, then set
maxHiddenLevel
to
currentHiddenLevel
Increase
index
by 1.
Return
composedPath
The
eventPhase
attribute must return the value it was
initialized to, which must be one of the following:
NONE
(numeric value 0)
Events
not currently
dispatched
are in this phase.
CAPTURING_PHASE
(numeric value 1)
When an
event
is
dispatched
to an object that
participates
in a
tree
it will be in this phase before it reaches its
target
AT_TARGET
(numeric value 2)
When an
event
is
dispatched
it will be in this phase on its
target
BUBBLING_PHASE
(numeric value 3)
When an
event
is
dispatched
to an object that
participates
in a
tree
it will be in this phase after it reaches its
target
Initially the attribute must be initialized to
NONE
Each
event
has the following associated flags that are all initially unset:
stop propagation flag
stop immediate propagation flag
canceled flag
in passive listener flag
composed flag
initialized flag
dispatch flag
The
stopPropagation()
method steps are to set
this
’s
stop propagation flag
The
cancelBubble
getter steps are to return true if
this
’s
stop propagation flag
is set; otherwise false.
The
cancelBubble
setter steps are to set
this
’s
stop propagation flag
if
the given value is true; otherwise do nothing.
The
stopImmediatePropagation()
method steps are to set
this
’s
stop propagation flag
and
this
’s
stop immediate propagation flag
The
bubbles
and
cancelable
attributes must return the values they were
initialized to.
To
set the canceled flag
, given an
event
event
, if
event
’s
cancelable
attribute value is true and
event
’s
in passive listener flag
is unset, then set
event
’s
canceled flag
, and do
nothing otherwise.
The
returnValue
getter steps are to return false if
this
’s
canceled flag
is set; otherwise true.
The
returnValue
setter steps are to
set the canceled flag
with
this
if
the given value is false; otherwise do nothing.
The
preventDefault()
method steps are to
set the canceled flag
with
this
There are scenarios where invoking
preventDefault()
has no
effect. User agents are encouraged to log the precise cause in a developer console, to aid
debugging.
The
defaultPrevented
getter steps are to return true
if
this
’s
canceled flag
is set; otherwise false.
The
composed
getter steps are to return true if
this
’s
composed flag
is set; otherwise false.
The
isTrusted
attribute must return the value it was
initialized to. When an
event
is created the attribute must be initialized to false.
isTrusted
is a convenience that indicates whether an
event
is
dispatched
by the user agent (as opposed to using
dispatchEvent()
). The sole legacy exception is
click()
, which causes
the user agent to dispatch an
event
whose
isTrusted
attribute is initialized to
false.
The
timeStamp
attribute must return the value it was
initialized to.
To
initialize
an
event
, with
type
bubbles
, and
cancelable
, run these steps:
Set
event
’s
initialized flag
Unset
event
’s
stop propagation flag
stop immediate propagation flag
, and
canceled flag
Set
event
’s
isTrusted
attribute to false.
Set
event
’s
target
to null.
Set
event
’s
type
attribute to
type
Set
event
’s
bubbles
attribute to
bubbles
Set
event
’s
cancelable
attribute to
cancelable
The
initEvent(
type
bubbles
cancelable
method steps are:
If
this
’s
dispatch flag
is set, then return.
Initialize
this
with
type
bubbles
, and
cancelable
initEvent()
is redundant with
event
constructors and
incapable of setting
composed
. It has to be supported for legacy content.
2.3.
Legacy extensions to the
Window
interface
partial
interface
Window
Replaceable
readonly
attribute
Event
or
undefined
event
; // legacy
};
Each
Window
object has an associated
current event
(undefined or an
Event
object). Unless stated otherwise it is undefined.
The
event
getter steps are to return
this
’s
current event
Web developers are strongly encouraged to instead rely on the
Event
object passed
to event listeners, as that will result in more portable code. This attribute is not available in
workers or worklets, and is inaccurate for events dispatched in
shadow trees
2.4.
Interface
CustomEvent
[Exposed=*]
interface
CustomEvent
Event
constructor
DOMString
type
optional
CustomEventInit
eventInitDict
= {});
readonly
attribute
any
detail
undefined
initCustomEvent
DOMString
type
optional
boolean
bubbles
false
optional
boolean
cancelable
false
optional
any
detail
null
); // legacy
};
dictionary
CustomEventInit
EventInit
any
detail
null
};
Events
using the
CustomEvent
interface can be used to carry custom data.
event
= new
CustomEvent
type
[,
eventInitDict
])
Works analogously to the constructor for
Event
except
that the
eventInitDict
argument now
allows for setting the
detail
attribute
too.
event
detail
Returns any custom data
event
was created with.
Typically used for synthetic events.
The
detail
attribute must return the value it
was initialized to.
The
initCustomEvent(
type
bubbles
cancelable
detail
method steps are:
If
this
’s
dispatch flag
is set, then return.
Initialize
this
with
type
bubbles
, and
cancelable
Set
this
’s
detail
attribute to
detail
2.5.
Constructing events
Specifications
may define
event constructing steps
for all or some
events
. The algorithm is passed an
event
event
and an
EventInit
eventInitDict
as indicated in the
inner event creation steps
This construct can be used by
Event
subclasses that have a more complex structure
than a simple 1:1 mapping between their initializing dictionary members and IDL attributes.
When a
constructor
of the
Event
interface, or of an interface that inherits from the
Event
interface, is invoked, these steps
must be run, given the arguments
type
and
eventInitDict
Let
event
be the result of running the
inner event creation steps
with
this interface, null, now, and
eventInitDict
Initialize
event
’s
type
attribute to
type
Return
event
To
create an event
using
eventInterface
, which must be either
Event
or an interface that inherits from
it, and optionally given a
realm
realm
, run these steps:
If
realm
is not given, then set it to null.
Let
dictionary
be the result of
converting
the JavaScript value undefined to the dictionary type accepted by
eventInterface
’s
constructor. (This dictionary type will either be
EventInit
or a dictionary that inherits from
it.)
This does not work if members are required; see
whatwg/dom#600
Let
event
be the result of running the
inner event creation steps
with
eventInterface
realm
, the time of the occurrence that the event is
signaling, and
dictionary
In macOS the time of the occurrence for input
actions is available via the
timestamp
property of
NSEvent
objects.
Initialize
event
’s
isTrusted
attribute to true.
Return
event
Create an event
is meant to be used by other specifications which need to
separately
create
and
dispatch
events, instead of simply
firing
them. It ensures the event’s attributes are initialized to the
correct defaults.
The
inner event creation steps
, given an
eventInterface
realm
time
, and
dictionary
, are as follows:
Let
event
be the result of creating a new object using
eventInterface
. If
realm
is non-null, then use that realm; otherwise, use the default behavior defined in
Web IDL.
As of the time of this writing Web IDL does not yet define any default behavior;
see
whatwg/webidl#135
Set
event
’s
initialized flag
Initialize
event
’s
timeStamp
attribute to the
relative high resolution coarse time
given
time
and
event
’s
relevant global object
For each
member
value
of
dictionary
: if
event
has an attribute whose
identifier
is
member
, then
initialize that attribute to
value
Run the
event constructing steps
with
event
and
dictionary
Return
event
2.6.
Defining event interfaces
In general, when defining a new interface that inherits from
Event
please always ask
feedback from the
WHATWG
or the
W3C WebApps WG
community.
The
CustomEvent
interface can be used as starting point.
However, do not introduce any
init
Event()
methods as they are redundant with constructors. Interfaces that inherit
from the
Event
interface that have such a method only have it
for historical reasons.
2.7.
Interface
EventTarget
[Exposed=*]
interface
EventTarget
constructor
();
undefined
addEventListener
DOMString
type
EventListener
callback
optional
AddEventListenerOptions
or
boolean
options
= {});
undefined
removeEventListener
DOMString
type
EventListener
callback
optional
EventListenerOptions
or
boolean
options
= {});
boolean
dispatchEvent
Event
event
);
};
callback
interface
EventListener
undefined
handleEvent
Event
event
);
};
dictionary
EventListenerOptions
boolean
capture
false
};
dictionary
AddEventListenerOptions
EventListenerOptions
boolean
passive
boolean
once
false
AbortSignal
signal
};
An
EventTarget
object represents a target to which an
event
can be
dispatched
when something has occurred.
Each
EventTarget
object has an associated
event listener list
(a
list
of zero or more
event listeners
). It is initially the empty list.
An
event listener
can be used to observe a specific
event
and consists of:
type
(a string)
callback
(null or an
EventListener
object)
capture
(a boolean, initially false)
passive
(null or a boolean, initially null)
once
(a boolean, initially false)
signal
(null or an
AbortSignal
object)
removed
(a boolean for bookkeeping purposes, initially false)
Although
callback
is an
EventListener
object, an
event listener
is a broader concept as can be seen above.
Each
EventTarget
object also has an associated
get the parent
algorithm,
which takes an
event
event
, and returns an
EventTarget
object. Unless
specified otherwise it returns null.
Nodes
shadow roots
, and
documents
override the
get the parent
algorithm.
Each
EventTarget
object can have an associated
activation behavior
algorithm. The
activation behavior
algorithm is passed an
event
, as indicated in the
dispatch
algorithm.
This exists because user agents perform certain actions for certain
EventTarget
objects, e.g., the
area
element, in response to synthetic
MouseEvent
events
whose
type
attribute is
click
. Web compatibility prevented it
from being removed and it is now the enshrined way of defining an activation of something.
[HTML]
Each
EventTarget
object that has
activation behavior
, can additionally
have both (not either) a
legacy-pre-activation behavior
algorithm
and a
legacy-canceled-activation behavior
algorithm.
These algorithms only exist for checkbox and radio
input
elements and
are not to be used for anything else.
[HTML]
target
= new
EventTarget
();
Creates a new
EventTarget
object, which can be used by developers to
dispatch
and
listen for
events
target
addEventListener
type
callback
[,
options
])
Appends an
event listener
for
events
whose
type
attribute value is
type
. The
callback
argument sets the
callback
that will be invoked when the
event
is
dispatched
The
options
argument sets listener-specific options. For compatibility this can be a
boolean, in which case the method behaves exactly as if the value was specified as
options
’s
capture
When set to true,
options
’s
capture
prevents
callback
from being invoked when the
event
’s
eventPhase
attribute value is
BUBBLING_PHASE
. When false (or not present),
callback
will not be invoked when
event
’s
eventPhase
attribute value is
CAPTURING_PHASE
. Either way,
callback
will be invoked if
event
’s
eventPhase
attribute value is
AT_TARGET
When set to true,
options
’s
passive
indicates that the
callback
will not cancel the event by invoking
preventDefault()
. This is used to enable performance optimizations described in
§ 2.8 Observing event listeners
When set to true,
options
’s
once
indicates that the
callback
will only be invoked once after which the event listener will
be removed.
If an
AbortSignal
is passed for
options
’s
signal
then the event listener will be removed when signal is aborted.
The
event listener
is appended to
target
’s
event listener list
and is not appended if it has the same
type
callback
, and
capture
target
removeEventListener
type
callback
[,
options
])
Removes the
event listener
in
target
’s
event listener list
with the same
type
callback
, and
options
target
dispatchEvent
event
Dispatches
a synthetic event
event
to
target
and returns true
if either
event
’s
cancelable
attribute value is false or its
preventDefault()
method was not invoked; otherwise false.
To
flatten
options
, run these
steps:
If
options
is a boolean, then return
options
Return
options
["
capture
"].
To
flatten more
options
, run these
steps:
Let
capture
be the result of
flattening
options
Let
once
be false.
Let
passive
and
signal
be null.
If
options
is a
dictionary
Set
once
to
options
["
once
"].
If
options
["
passive
"]
exists
, then set
passive
to
options
["
passive
"].
If
options
["
signal
"]
exists
, then set
signal
to
options
["
signal
"].
Return
capture
passive
once
, and
signal
The
new EventTarget()
constructor steps are to do nothing.
Because of the defaults stated elsewhere, the returned
EventTarget
’s
get the parent
algorithm will return null, and it will have no
activation behavior
legacy-pre-activation behavior
or
legacy-canceled-activation behavior
In the future we could allow custom
get the parent
algorithms. Let us know
if this would be useful for your programs. For now, all author-created
EventTarget
s do not
participate in a tree structure.
The
default passive value
, given an event type
type
and an
EventTarget
eventTarget
, is determined as follows:
Return true if all of the following are true:
type
is one of "
touchstart
", "
touchmove
",
wheel
", or "
mousewheel
".
[TOUCH-EVENTS]
[UIEVENTS]
eventTarget
is a
Window
object, or is a
node
whose
node document
is
eventTarget
, or is a
node
whose
node document
’s
document element
is
eventTarget
, or is a
node
whose
node document
’s
body element
is
eventTarget
[HTML]
Return false.
To
add an event listener
, given an
EventTarget
object
eventTarget
and an
event listener
listener
, run these steps:
If
eventTarget
is a
ServiceWorkerGlobalScope
object, its
service worker
’s
script resource
’s
has ever been evaluated flag
is set, and
listener
’s
type
matches the
type
attribute value of any of the
service worker events
, then
report a warning to the console
that this might not give
the expected results.
[SERVICE-WORKERS]
If
listener
’s
signal
is non-null and is
aborted
, then return.
If
listener
’s
callback
is null, then return.
If
listener
’s
passive
is null, then set it to the
default passive value
given
listener
’s
type
and
eventTarget
If
eventTarget
’s
event listener list
does not
contain
an
event listener
whose
type
is
listener
’s
type
callback
is
listener
’s
callback
, and
capture
is
listener
’s
capture
, then
append
listener
to
eventTarget
’s
event listener list
If
listener
’s
signal
is non-null, then
add the following
abort steps to it:
Remove an event listener
with
eventTarget
and
listener
The
add an event listener
concept exists to ensure
event handlers
use
the same code path.
[HTML]
The
addEventListener(
type
callback
options
method steps are:
Let
capture
passive
once
, and
signal
be the
result of
flattening more
options
Add an event listener
with
this
and an
event listener
whose
type
is
type
callback
is
callback
capture
is
capture
passive
is
passive
once
is
once
, and
signal
is
signal
To
remove an event listener
, given an
EventTarget
object
eventTarget
and an
event listener
listener
, run these steps:
If
eventTarget
is a
ServiceWorkerGlobalScope
object and its
service worker
’s
set of event types to handle
contains
listener
’s
type
, then
report a warning to the console
that this might not give the expected results.
[SERVICE-WORKERS]
Set
listener
’s
removed
to true and
remove
listener
from
eventTarget
’s
event listener list
HTML needs this to define event handlers.
[HTML]
To
remove all event listeners
, given an
EventTarget
object
eventTarget
for each
listener
of
eventTarget
’s
event listener list
remove an event listener
with
eventTarget
and
listener
HTML needs this to define
document.open()
[HTML]
The
removeEventListener(
type
callback
options
method steps are:
Let
capture
be the result of
flattening
options
If
this
’s
event listener list
contains
an
event listener
whose
type
is
type
callback
is
callback
, and
capture
is
capture
, then
remove an event listener
with
this
and that
event listener
The event listener list will not contain multiple event listeners with equal
type
callback
, and
capture
, as
add an event listener
prevents that.
The
dispatchEvent(
event
method steps
are:
If
event
’s
dispatch flag
is set, or if its
initialized flag
is not
set, then
throw
an "
InvalidStateError
DOMException
Initialize
event
’s
isTrusted
attribute to false.
Return the result of
dispatching
event
to
this
2.8.
Observing event listeners
In general, developers do not expect the presence of an
event listener
to be observable.
The impact of an
event listener
is determined by its
callback
. That is, a developer
adding a no-op
event listener
would not expect it to have any side effects.
Unfortunately, some event APIs have been designed such that implementing them efficiently
requires observing
event listeners
. This can make the presence of listeners observable in
that even empty listeners can have a dramatic performance impact on the behavior of the application.
For example, touch and wheel events which can be used to block asynchronous scrolling. In some cases
this problem can be mitigated by specifying the event to be
cancelable
only when there is
at least one non-
passive
listener. For example,
non-
passive
TouchEvent
listeners must block scrolling, but if all
listeners are
passive
then scrolling can be allowed to start
in parallel
by making the
TouchEvent
uncancelable (so that calls to
preventDefault()
are ignored). So code dispatching an event is able to observe the absence
of non-
passive
listeners, and use that to clear the
cancelable
property of the event being dispatched.
Ideally, any new event APIs are defined such that they do not need this property. (Use
whatwg/dom
for discussion.)
To
legacy-obtain service worker fetch event listener callbacks
given a
ServiceWorkerGlobalScope
global
, run these steps. They return a
list
of
EventListener
objects.
Let
callbacks
be « ».
For each
listener
of
global
’s
event listener list
: if
listener
’s
type
is
fetch
" and
listener
’s
callback
is non-null,
then
append
listener
’s
callback
to
callbacks
Return
callbacks
2.9.
Dispatching events
To
dispatch
an
event
to a
target
, with an optional
legacy target override flag
and an optional
legacyOutputDidListenersThrowFlag
, run these steps:
Set
event
’s
dispatch flag
Let
targetOverride
be
target
, if
legacy target override flag
is not given, and
target
’s
associated
Document
otherwise.
[HTML]
legacy target override flag
is only used by HTML and only when
target
is a
Window
object.
Let
activationTarget
be null.
Let
relatedTarget
be the result of
retargeting
event
’s
relatedTarget
against
target
Let
clearTargets
be false.
If
target
is not
relatedTarget
or
target
is
event
’s
relatedTarget
Let
touchTargets
be a new
list
For each
touchTarget
of
event
’s
touch target list
append
the result of
retargeting
touchTarget
against
target
to
touchTargets
Append to an event path
with
event
target
targetOverride
relatedTarget
touchTargets
, and false.
Let
isActivationEvent
be true, if
event
is a
MouseEvent
object
and
event
’s
type
attribute is "
click
"; otherwise false.
If
isActivationEvent
is true and
target
has
activation behavior
, then set
activationTarget
to
target
Let
slottable
be
target
, if
target
is a
slottable
and is
assigned
, and null otherwise.
Let
slot-in-closed-tree
be false.
Let
parent
be the result of invoking
target
’s
get the parent
with
event
While
parent
is non-null:
If
slottable
is non-null:
Assert:
parent
is a
slot
Set
slottable
to null.
If
parent
’s
root
is a
shadow root
whose
mode
is "
closed
", then set
slot-in-closed-tree
to true.
If
parent
is a
slottable
and is
assigned
, then
set
slottable
to
parent
Let
relatedTarget
be the result of
retargeting
event
’s
relatedTarget
against
parent
Let
touchTargets
be a new
list
For each
touchTarget
of
event
’s
touch target list
append
the result of
retargeting
touchTarget
against
parent
to
touchTargets
If
parent
is a
Window
object, or
parent
is a
node
and
target
’s
root
is a
shadow-including inclusive ancestor
of
parent
If
isActivationEvent
is true,
event
’s
bubbles
attribute is true,
activationTarget
is null, and
parent
has
activation behavior
, then set
activationTarget
to
parent
Append to an event path
with
event
parent
, null,
relatedTarget
touchTargets
, and
slot-in-closed-tree
Otherwise, if
parent
is
relatedTarget
, then set
parent
to null.
Otherwise:
Set
target
to
parent
If
isActivationEvent
is true,
activationTarget
is null, and
target
has
activation behavior
, then set
activationTarget
to
target
Append to an event path
with
event
parent
target
relatedTarget
touchTargets
, and
slot-in-closed-tree
If
parent
is non-null, then set
parent
to the result of invoking
parent
’s
get the parent
with
event
Set
slot-in-closed-tree
to false.
Let
clearTargetsStruct
be the last struct in
event
’s
path
whose
shadow-adjusted target
is non-null.
If
clearTargetsStruct
’s
shadow-adjusted target
clearTargetsStruct
’s
relatedTarget
, or an
EventTarget
object
in
clearTargetsStruct
’s
touch target list
is a
node
whose
root
is a
shadow root
: set
clearTargets
to true.
If
activationTarget
is non-null and
activationTarget
has
legacy-pre-activation behavior
, then run
activationTarget
’s
legacy-pre-activation behavior
For each
struct
of
event
’s
path
, in
reverse order:
If
struct
’s
shadow-adjusted target
is non-null, then
set
event
’s
eventPhase
attribute to
AT_TARGET
Otherwise, set
event
’s
eventPhase
attribute to
CAPTURING_PHASE
Invoke
with
struct
event
, "
capturing
", and
legacyOutputDidListenersThrowFlag
if given.
For each
struct
of
event
’s
path
If
struct
’s
shadow-adjusted target
is non-null, then
set
event
’s
eventPhase
attribute to
AT_TARGET
Otherwise:
If
event
’s
bubbles
attribute is false, then
continue
Set
event
’s
eventPhase
attribute to
BUBBLING_PHASE
Invoke
with
struct
event
, "
bubbling
", and
legacyOutputDidListenersThrowFlag
if given.
Set
event
’s
eventPhase
attribute to
NONE
Set
event
’s
currentTarget
attribute to null.
Set
event
’s
path
to the empty list.
Unset
event
’s
dispatch flag
stop propagation flag
, and
stop immediate propagation flag
If
clearTargets
is true:
Set
event
’s
target
to null.
Set
event
’s
relatedTarget
to null.
Set
event
’s
touch target list
to the empty list.
If
activationTarget
is non-null:
If
event
’s
canceled flag
is unset, then run
activationTarget
’s
activation behavior
with
event
Otherwise, if
activationTarget
has
legacy-canceled-activation behavior
, then run
activationTarget
’s
legacy-canceled-activation behavior
Return false if
event
’s
canceled flag
is set; otherwise true.
To
append to an event path
, given an
event
invocationTarget
shadowAdjustedTarget
relatedTarget
touchTargets
, and a
slot-in-closed-tree
, run these
steps:
Let
invocationTargetInShadowTree
be false.
If
invocationTarget
is a
node
and its
root
is a
shadow root
, then set
invocationTargetInShadowTree
to true.
Let
root-of-closed-tree
be false.
If
invocationTarget
is a
shadow root
whose
mode
is "
closed
", then set
root-of-closed-tree
to true.
Append
a new
struct
to
event
’s
path
whose
invocation target
is
invocationTarget
invocation-target-in-shadow-tree
is
invocationTargetInShadowTree
shadow-adjusted target
is
shadowAdjustedTarget
relatedTarget
is
relatedTarget
touch target list
is
touchTargets
root-of-closed-tree
is
root-of-closed-tree
, and
slot-in-closed-tree
is
slot-in-closed-tree
To
invoke
, given a
struct
event
phase
, and an optional
legacyOutputDidListenersThrowFlag
run these steps:
Set
event
’s
target
to the
shadow-adjusted target
of the last struct in
event
’s
path
, that is either
struct
or preceding
struct
, whose
shadow-adjusted target
is non-null.
Set
event
’s
relatedTarget
to
struct
’s
relatedTarget
Set
event
’s
touch target list
to
struct
’s
touch target list
If
event
’s
stop propagation flag
is set, then return.
Initialize
event
’s
currentTarget
attribute to
struct
’s
invocation target
Let
listeners
be a
clone
of
event
’s
currentTarget
attribute value’s
event listener list
This avoids
event listeners
added after this point from being
run. Note that removal still has an effect due to the
removed
field.
Let
invocationTargetInShadowTree
be
struct
’s
invocation-target-in-shadow-tree
Let
found
be the result of running
inner invoke
with
event
listeners
phase
invocationTargetInShadowTree
, and
legacyOutputDidListenersThrowFlag
if given.
If
found
is false and
event
’s
isTrusted
attribute is true:
Let
originalEventType
be
event
’s
type
attribute value.
If
event
’s
type
attribute value is a match for any of the strings in the
first column in the following table, set
event
’s
type
attribute value to
the string in the second column on the same row as the matching string, and return otherwise.
Event type
Legacy event type
animationend
webkitAnimationEnd
animationiteration
webkitAnimationIteration
animationstart
webkitAnimationStart
transitionend
webkitTransitionEnd
Inner invoke
with
event
listeners
phase
invocationTargetInShadowTree
, and
legacyOutputDidListenersThrowFlag
if given.
Set
event
’s
type
attribute value to
originalEventType
To
inner invoke
, given an
event
listeners
phase
invocationTargetInShadowTree
and an optional
legacyOutputDidListenersThrowFlag
, run these steps:
Let
found
be false.
For each
listener
of
listeners
, whose
removed
is false:
If
event
’s
type
attribute value is not
listener
’s
type
, then
continue
Set
found
to true.
If
phase
is "
capturing
" and
listener
’s
capture
is false, then
continue
If
phase
is "
bubbling
" and
listener
’s
capture
is true, then
continue
If
listener
’s
once
is true, then
remove an event listener
given
event
’s
currentTarget
attribute value
and
listener
Let
global
be
listener
callback
’s
associated realm
’s
global object
Let
currentEvent
be undefined.
If
global
is a
Window
object:
Set
currentEvent
to
global
’s
current event
If
invocationTargetInShadowTree
is false, then set
global
’s
current event
to
event
If
listener
’s
passive
is true, then set
event
’s
in passive listener flag
If
global
is a
Window
object, then
record timing info for event listener
given
event
and
listener
Call a user object’s operation
with
listener
’s
callback
, "
handleEvent
", «
event
», and
event
’s
currentTarget
attribute value. If this throws an exception
exception
Report
exception
for
listener
’s
callback
’s corresponding JavaScript object’s
associated realm
’s
global object
Set
legacyOutputDidListenersThrowFlag
if given.
The
legacyOutputDidListenersThrowFlag
is only used by Indexed
Database API.
[INDEXEDDB]
Unset
event
’s
in passive listener flag
If
global
is a
Window
object, then set
global
’s
current event
to
currentEvent
If
event
’s
stop immediate propagation flag
is set, then
break
Return
found
2.10.
Firing events
To
fire an event
named
at
target
optionally using an
eventConstructor
, with a description of how IDL attributes are to be
initialized, and a
legacy target override flag
, run these steps:
If
eventConstructor
is not given, then let
eventConstructor
be
Event
Let
event
be the result of
creating an event
given
eventConstructor
, in the
relevant realm
of
target
Initialize
event
’s
type
attribute to
Initialize any other IDL attributes of
event
as described in the invocation of this
algorithm.
This also allows for the
isTrusted
attribute to be set to false.
Return the result of
dispatching
event
at
target
, with
legacy target override flag
set if set.
Fire in the context of DOM is short for
creating
, initializing, and
dispatching
an
event
Fire an event
makes that process easier to write down.
If the
event
needs its
bubbles
or
cancelable
attribute initialized,
one could write "
fire an event
named
submit
at
target
with its
cancelable
attribute initialized to true".
Or, when a custom constructor is needed, "
fire an event
named
click
at
target
using
MouseEvent
with its
detail
attribute initialized to 1".
Occasionally the return value is important:
Let
doAction
be the result of
firing an event
named
like
at
target
If
doAction
is true, then …
2.11.
Action versus occurrence
An
event
signifies an occurrence, not an action. Phrased differently, it
represents a notification from an algorithm and can be used to influence the future course
of that algorithm (e.g., through invoking
preventDefault()
).
Events
must not be
used as actions or initiators that cause some algorithm to start running. That is not what
they are for.
This is called out here specifically because previous
iterations of the DOM had a concept of "default actions" associated with
events
that gave folks all the wrong ideas.
Events
do not represent or cause actions, they
can only be used to influence an ongoing one.
3.
Aborting ongoing activities
Though promises do not have a built-in aborting mechanism, many APIs using them require abort
semantics.
AbortController
is meant to support these requirements by providing an
abort()
method that toggles the state of a corresponding
AbortSignal
object.
The API which wishes to support aborting can accept an
AbortSignal
object, and use its state to
determine how to proceed.
APIs that rely upon
AbortController
are encouraged to respond to
abort()
by rejecting any unsettled promise with the
AbortSignal
’s
abort reason
A hypothetical
doAmazingness({ ... })
method could accept an
AbortSignal
object
to support aborting as follows:
const
controller
new
AbortController
();
const
signal
controller
signal
startSpinner
();
doAmazingness
({
...,
signal
})
then
result
=>
...)
catch
err
=>
if
err
name
==
'AbortError'
return
showUserErrorMessage
();
})
then
(()
=>
stopSpinner
());
// …
controller
abort
();
doAmazingness
could be implemented as follows:
function
doAmazingness
({
signal
})
return
new
Promise
((
resolve
reject
=>
signal
throwIfAborted
();
// Begin doing amazingness, and call resolve(result) when done.
// But also, watch for signals:
signal
addEventListener
'abort'
()
=>
// Stop doing amazingness, and:
reject
signal
reason
);
});
});
APIs that do not return promises can either react in an equivalent manner or opt to not surface
the
AbortSignal
’s
abort reason
at all.
addEventListener()
is an
example of an API where the latter made sense.
APIs that require more granular control could extend both
AbortController
and
AbortSignal
objects according to their needs.
3.1.
Interface
AbortController
[Exposed=*]
interface
AbortController
constructor
();

SameObject
readonly
attribute
AbortSignal
signal
undefined
abort
optional
any
reason
);
};
controller
= new
AbortController
()
Returns a new
controller
whose
signal
is set to a newly
created
AbortSignal
object.
controller
signal
Returns the
AbortSignal
object associated with this object.
controller
abort
reason
Invoking this method will store
reason
in this object’s
AbortSignal
’s
abort reason
, and signal to any observers that the associated activity is to be
aborted. If
reason
is undefined, then an "
AbortError
DOMException
will be stored.
An
AbortController
object has an associated
signal
(an
AbortSignal
object).
The
new AbortController()
constructor steps are:
Let
signal
be a new
AbortSignal
object.
Set
this
’s
signal
to
signal
The
signal
getter steps are to return
this
’s
signal
The
abort(
reason
method steps are
to
signal abort
on
this
with
reason
if it is given.
To
signal abort
on an
AbortController
controller
with an optional
reason
signal abort
on
controller
’s
signal
with
reason
if it is given.
3.2.
Interface
AbortSignal
[Exposed=*]
interface
AbortSignal
EventTarget
NewObject
static
AbortSignal
abort
optional
any
reason
);
Exposed
=(
Window
Worker
),
NewObject
static
AbortSignal
timeout
([
EnforceRange
unsigned
long
long
milliseconds
);
NewObject
static
AbortSignal
_any
sequence
AbortSignal
signals
);
readonly
attribute
boolean
aborted
readonly
attribute
any
reason
undefined
throwIfAborted
();
attribute
EventHandler
onabort
};
AbortSignal .
abort
reason
Returns an
AbortSignal
instance whose
abort reason
is set to
reason
if not undefined; otherwise to an "
AbortError
DOMException
AbortSignal .
any
signals
Returns an
AbortSignal
instance which will be aborted once any of
signals
is
aborted. Its
abort reason
will be set to whichever one of
signals
caused it to be aborted.
AbortSignal .
timeout
milliseconds
Returns an
AbortSignal
instance which will be aborted in
milliseconds
milliseconds. Its
abort reason
will be set to a
TimeoutError
DOMException
signal
aborted
Returns true if
signal
’s
AbortController
has signaled to abort; otherwise false.
signal
reason
Returns
signal
’s
abort reason
signal
throwIfAborted
()
Throws
signal
’s
abort reason
, if
signal
’s
AbortController
has signaled to abort; otherwise, does nothing.
An
AbortSignal
object has an associated
abort reason
(a
JavaScript value), which is initially undefined.
An
AbortSignal
object has associated
abort algorithms
, (a
set
of algorithms which are to be executed when it is
aborted
),
which is initially empty.
The
abort algorithms
enable APIs with complex
requirements to react in a reasonable way to
abort()
. For example, a given API’s
abort reason
might need to be propagated to a cross-thread environment, such as a
service worker.
An
AbortSignal
object has a
dependent
(a boolean), which is
initially false.
An
AbortSignal
object has associated
source signals
(a weak
set
of
AbortSignal
objects that the object is dependent on for its
aborted
state), which is initially empty.
An
AbortSignal
object has associated
dependent signals
(a weak
set
of
AbortSignal
objects that are dependent on the object for their
aborted
state), which is initially empty.
The static
abort(
reason
method steps
are:
Let
signal
be a new
AbortSignal
object.
Set
signal
’s
abort reason
to
reason
if it is given;
otherwise to a new "
AbortError
DOMException
Return
signal
The static
timeout(
milliseconds
method
steps are:
Let
signal
be a new
AbortSignal
object.
Let
global
be
signal
’s
relevant global object
Run steps after a timeout
given
global
, "
AbortSignal-timeout
",
milliseconds
, and the following step:
Queue a global task
on the
timer task source
given
global
to
signal abort
given
signal
and a new
TimeoutError
DOMException
For the duration of this timeout, if
signal
has any event listeners registered for
its
abort
event, there must be a strong reference from
global
to
signal
Return
signal
The static
any(
signals
method
steps are to return the result of
creating a dependent abort signal
from
signals
using
AbortSignal
and the
current realm
The
aborted
getter steps are to return true if
this
is
aborted
; otherwise false.
The
reason
getter steps are to return
this
’s
abort reason
The
throwIfAborted()
method steps are to throw
this
’s
abort reason
, if
this
is
aborted
This method is primarily useful for when functions accepting
AbortSignal
s want to throw (or
return a rejected promise) at specific checkpoints, instead of passing along the
AbortSignal
to other methods. For example, the following function allows aborting in between each attempt to
poll for a condition. This gives opportunities to abort the polling process, even though the
actual asynchronous operation (i.e.,
await
func
()
) does not
accept an
AbortSignal
async
function
waitForCondition
func
targetValue
signal
{})
while
true
signal
throwIfAborted
();
const
result
await
func
();
if
result
===
targetValue
return
The
onabort
attribute is an
event handler IDL attribute
for the
onabort
event handler
, whose
event handler event type
is
abort
Changes to an
AbortSignal
object represent the wishes of the corresponding
AbortController
object, but an API observing the
AbortSignal
object can choose to ignore
them. For instance, if the operation has already completed.
An
AbortSignal
object is
aborted
when its
abort reason
is not undefined.
To
add
an algorithm
algorithm
to an
AbortSignal
object
signal
If
signal
is
aborted
, then return.
Append
algorithm
to
signal
’s
abort algorithms
To
remove
an algorithm
algorithm
from an
AbortSignal
signal
remove
algorithm
from
signal
’s
abort algorithms
To
signal abort
, given an
AbortSignal
object
signal
and
an optional
reason
If
signal
is
aborted
, then return.
Set
signal
’s
abort reason
to
reason
if it is given;
otherwise to a new "
AbortError
DOMException
Let
dependentSignalsToAbort
be a new
list
For each
dependentSignal
of
signal
’s
dependent signals
If
dependentSignal
is not
aborted
Set
dependentSignal
’s
abort reason
to
signal
’s
abort reason
Append
dependentSignal
to
dependentSignalsToAbort
Run the abort steps
for
signal
For each
dependentSignal
of
dependentSignalsToAbort
run the abort steps
for
dependentSignal
To
run the abort steps
for an
AbortSignal
signal
For each
algorithm
of
signal
’s
abort algorithms
: run
algorithm
Empty
signal
’s
abort algorithms
Fire an event
named
abort
at
signal
To
create a dependent abort signal
from a list of
AbortSignal
objects
signals
, using
signalInterface
, which must be either
AbortSignal
or an
interface that inherits from it, and a
realm
Let
resultSignal
be a
new
object implementing
signalInterface
using
realm
For each
signal
of
signals
: if
signal
is
aborted
, then set
resultSignal
’s
abort reason
to
signal
’s
abort reason
and return
resultSignal
Set
resultSignal
’s
dependent
to true.
For each
signal
of
signals
If
signal
’s
dependent
is false:
Append
signal
to
resultSignal
’s
source signals
Append
resultSignal
to
signal
’s
dependent signals
Otherwise,
for each
sourceSignal
of
signal
’s
source signals
Assert:
sourceSignal
is not
aborted
and not
dependent
Append
sourceSignal
to
resultSignal
’s
source signals
Append
resultSignal
to
sourceSignal
’s
dependent signals
Return
resultSignal
3.2.1.
Garbage collection
A non-
aborted
dependent
AbortSignal
object must not be
garbage collected while its
source signals
is non-empty and it has registered event
listeners for its
abort
event or its
abort algorithms
is non-empty.
3.3.
Using
AbortController
and
AbortSignal
objects in
APIs
Any web platform API using promises to represent operations that can be aborted must adhere to
the following:
Accept
AbortSignal
objects through a
signal
dictionary member.
Convey that the operation got aborted by rejecting the promise with
AbortSignal
object’s
abort reason
Reject immediately if the
AbortSignal
is already
aborted
, otherwise:
Use the
abort algorithms
mechanism to observe changes to the
AbortSignal
object and do so in a manner that does not lead to clashes with other observers.
The method steps for a promise-returning method
doAmazingness(
options
could be as follows:
Let
global
be
this
’s
relevant global object
Let
be
a new promise
If
options
["
signal
"]
exists
Let
signal
be
options
["
signal
"].
If
signal
is
aborted
, then
reject
with
signal
’s
abort reason
and return
Add the following abort steps
to
signal
Stop doing amazing things.
Reject
with
signal
’s
abort reason
Run these steps
in parallel
Let
amazingResult
be the result of doing some amazing things.
Queue a global task
on the amazing task source given
global
to
resolve
with
amazingResult
Return
APIs not using promises should still adhere to the above as much as possible.
4.
Nodes
4.1.
Introduction to "The DOM"
In its original sense, "The DOM" is an API for
accessing and manipulating documents (in particular, HTML and XML
documents). In this specification, the term "document" is used for any
markup-based resource, ranging from short static documents to long essays or
reports with rich multimedia, as well as to fully-fledged interactive
applications.
Each such document is represented as a
node tree
. Some of the
nodes
in a
tree
can have
children
, while others are always leaves.
To illustrate, consider this HTML document:

html
class
head
><
title
Aliens?
title
>head
body
Why yes.
body
html
It is represented as follows:
Document
Doctype
html
Element
html
class
="
Element
head
Element
title
Text
Aliens?
Text
⏎␣
Element
body
Text
Why yes.⏎
Note that, due to the magic that is
HTML parsing
, not all
ASCII whitespace
were turned into
Text
nodes
, but the general concept is
clear. Markup goes in, a
tree
of
nodes
comes out.
The most excellent
Live DOM Viewer
can be used to explore this matter in more detail.
4.2.
Node tree
Nodes
are objects that
implement
Node
Nodes
participate
in a
tree
, which is known as the
node tree
In practice you deal with more specific objects.
Objects that
implement
Node
also implement an inherited interface:
Document
DocumentType
DocumentFragment
Element
CharacterData
, or
Attr
Objects that implement
DocumentFragment
sometimes implement
ShadowRoot
Objects that implement
Element
also typically implement an inherited interface, such as
HTMLAnchorElement
Objects that implement
CharacterData
also implement an inherited interface:
Text
ProcessingInstruction
, or
Comment
Objects that implement
Text
sometimes implement
CDATASection
Thus, every
node
’s
primary interface
is one of:
Document
DocumentType
DocumentFragment
ShadowRoot
Element
or an inherited interface of
Element
Attr
Text
CDATASection
ProcessingInstruction
, or
Comment
For brevity, this specification refers to an object that
implements
Node
and an
inherited interface
NodeInterface
, as a
NodeInterface
node
node tree
is constrained as follows, expressed as a relationship between a
node
and its potential
children
Document
In
tree order
Zero or more
ProcessingInstruction
or
Comment
nodes
Optionally one
DocumentType
node
Zero or more
ProcessingInstruction
or
Comment
nodes
Optionally one
Element
node
Zero or more
ProcessingInstruction
or
Comment
nodes
DocumentFragment
Element
Zero or more
Element
or
CharacterData
nodes
DocumentType
CharacterData
Attr
No
children
Attr
nodes
participate
in a
tree
for historical
reasons; they never have a (non-null)
parent
or any
children
and are
therefore alone in a
tree
To determine the
length
of a
node
node
, run these steps:
If
node
is a
DocumentType
or
Attr
node
, then return 0.
If
node
is a
CharacterData
node
, then return
node
’s
data
’s
length
Return the number of
node
’s
children
node
is considered
empty
if its
length
is 0.
4.2.1.
Document tree
document tree
is a
node tree
whose
root
is a
document
The
document element
of a
document
is the
element
whose
parent
is that
document
, if it exists; otherwise null.
Per the
node tree
constraints, there can be only one such
element
node
is
in a document tree
if its
root
is a
document
node
is
in a document
if it is
in a document tree
The term
in a document
is no longer supposed to be used. It indicates that
the standard using it has not been updated to account for
shadow trees
4.2.2.
Shadow tree
shadow tree
is a
node tree
whose
root
is a
shadow root
shadow root
is always attached to another
node tree
through its
host
. A
shadow tree
is therefore never alone. The
node tree
of a
shadow root
’s
host
is sometimes
referred to as the
light tree
shadow tree
’s corresponding
light tree
can be a
shadow tree
itself.
node
is
connected
if its
shadow-including root
is a
document
4.2.2.1.
Slots
shadow tree
contains zero or more
elements
that are
slots
slot
can only be created through HTML’s
slot
element.
slot
has an associated
name
(a string). Unless stated
otherwise it is the empty string.
Use these
attribute change steps
to update a
slot
’s
name
If
element
is a
slot
localName
is
name
, and
namespace
is null:
If
value
is
oldValue
, then return.
If
value
is null and
oldValue
is the empty string, then return.
If
value
is the empty string and
oldValue
is null, then return.
If
value
is null or the empty string, then set
element
’s
name
to the empty string.
Otherwise, set
element
’s
name
to
value
Run
assign slottables for a tree
with
element
’s
root
The first
slot
in a
shadow tree
, in
tree order
, whose
name
is the empty string, is sometimes known as the "default slot".
slot
has an associated
assigned nodes
(a list of
slottables
). Unless stated otherwise it is empty.
4.2.2.2.
Slottables
Element
and
Text
nodes
are
slottables
slot
can be a
slottable
slottable
has an associated
name
(a
string). Unless stated otherwise it is the empty string.
Use these
attribute change steps
to update a
slottable
’s
name
If
localName
is
slot
and
namespace
is null:
If
value
is
oldValue
, then return.
If
value
is null and
oldValue
is the empty string, then return.
If
value
is the empty string and
oldValue
is null, then return.
If
value
is null or the empty string, then set
element
’s
name
to the empty string.
Otherwise, set
element
’s
name
to
value
If
element
is
assigned
, then run
assign slottables
for
element
’s
assigned slot
Run
assign a slot
for
element
slottable
has an associated
assigned slot
(null or a
slot
).
Unless stated otherwise it is null. A
slottable
is
assigned
if its
assigned slot
is
non-null.
slottable
has an associated
manual slot assignment
(null
or a
slot
). Unless stated otherwise, it is null.
slottable
’s
manual slot assignment
can be implemented using a weak
reference to the
slot
, because this variable is not directly accessible from script.
4.2.2.3.
Finding slots and slottables
To
find a slot
for a given
slottable
slottable
and an optional
boolean
open
(default false):
If
slottable
’s
parent
is null, then return null.
Let
shadow
be
slottable
’s
parent
’s
shadow root
If
shadow
is null, then return null.
If
open
is true and
shadow
’s
mode
is not
open
", then return null.
If
shadow
’s
slot assignment
is "
manual
", then
return the
slot
in
shadow
’s
descendants
whose
manually assigned nodes
contains
slottable
, if any; otherwise
null.
Return the first
slot
in
tree order
in
shadow
’s
descendants
whose
name
is
slottable
’s
name
, if any; otherwise null.
To
find slottables
for a given
slot
slot
Let
result
be « ».
Let
root
be
slot
’s
root
If
root
is not a
shadow root
, then return
result
Let
host
be
root
’s
host
If
root
’s
slot assignment
is "
manual
":
For each
slottable
slottable
of
slot
’s
manually assigned nodes
, if
slottable
’s
parent
is
host
append
slottable
to
result
Otherwise, for each
slottable
child
slottable
of
host
, in
tree order
Let
foundSlot
be the result of
finding a slot
given
slottable
If
foundSlot
is
slot
, then
append
slottable
to
result
Return
result
To
find flattened slottables
for a given
slot
slot
Let
result
be « ».
If
slot
’s
root
is not a
shadow root
, then return
result
Let
slottables
be the result of
finding slottables
given
slot
If
slottables
is the empty list, then append each
slottable
child
of
slot
, in
tree order
, to
slottables
For each
node
of
slottables
If
node
is a
slot
whose
root
is a
shadow root
Let
temporaryResult
be the result of
finding flattened slottables
given
node
Append each
slottable
in
temporaryResult
, in order, to
result
Otherwise, append
node
to
result
Return
result
4.2.2.4.
Assigning slottables and slots
To
assign slottables
for a
slot
slot
Let
slottables
be the result of
finding slottables
for
slot
If
slottables
and
slot
’s
assigned nodes
are not
identical, then run
signal a slot change
for
slot
Set
slot
’s
assigned nodes
to
slottables
For each
slottable
of
slottables
: set
slottable
’s
assigned slot
to
slot
To
assign slottables for a tree
, given a
node
root
, run
assign slottables
for each
slot
of
root
’s
inclusive descendants
, in
tree order
To
assign a slot
, given a
slottable
slottable
Let
slot
be the result of
finding a slot
with
slottable
If
slot
is non-null, then run
assign slottables
for
slot
4.2.2.5.
Signaling slot change
Each
similar-origin window agent
has
signal slots
(a
set
of
slots
), which is initially empty.
[HTML]
To
signal a slot change
, for a
slot
slot
Append
slot
to
slot
’s
relevant agent
’s
signal slots
Queue a mutation observer microtask
4.2.3.
Mutation algorithms
To
ensure pre-insert validity
of a
node
node
into a
node
parent
before null or a
node
child
If
parent
is not a
Document
DocumentFragment
, or
Element
node
, then
throw
a "
HierarchyRequestError
DOMException
If
node
is a
host-including inclusive ancestor
of
parent
, then
throw
a "
HierarchyRequestError
DOMException
If
child
is non-null and its
parent
is not
parent
then
throw
a "
NotFoundError
DOMException
If
node
is not a
DocumentFragment
DocumentType
Element
, or
CharacterData
node
, then
throw
HierarchyRequestError
DOMException
If either
node
is a
Text
node
and
parent
is a
document
, or
node
is a
doctype
and
parent
is not a
document
, then
throw
a "
HierarchyRequestError
DOMException
If
parent
is a
document
, and any of the statements below, switched on
the interface
node
implements
, are true, then
throw
HierarchyRequestError
DOMException
DocumentFragment
If
node
has more than one
element
child
or has a
Text
node
child
Otherwise, if
node
has one
element
child
and either
parent
has an
element
child
child
is a
doctype
, or
child
is non-null and a
doctype
is
following
child
Element
parent
has an
element
child
child
is
doctype
, or
child
is non-null and a
doctype
is
following
child
DocumentType
parent
has a
doctype
child
child
is non-null
and an
element
is
preceding
child
, or
child
is null
and
parent
has an
element
child
To
pre-insert
node
node
into a
node
parent
before null or
node
child
Ensure pre-insert validity
of
node
into
parent
before
child
Let
referenceChild
be
child
If
referenceChild
is
node
, then set
referenceChild
to
node
’s
next sibling
Insert
node
into
parent
before
referenceChild
Return
node
Specifications
may define
insertion steps
for all or some
nodes
. The
algorithm is passed
insertedNode
, as indicated in the
insert
algorithm
below. These steps must not modify the
node tree
that
insertedNode
participates
in, create
browsing contexts
fire events
, or otherwise execute JavaScript. These steps may
queue tasks
to do these things asynchronously, however.
While the
insertion steps
cannot execute JavaScript (among other things), they will
indeed have script-observable consequences. Consider the below example:
const
h1
document
querySelector
'h1'
);
const
fragment
new
DocumentFragment
();
const
script
fragment
appendChild
document
createElement
'script'
));
const
style
fragment
appendChild
document
createElement
'style'
));
script
innerText
'console.log(getComputedStyle(h1).color)'
// Logs 'rgb(255, 0, 0)'
style
innerText
'h1 {color: rgb(255, 0, 0);}'
document
body
append
fragment
);
The script in the above example logs
'rgb(255, 0, 0)'
because
the following happen in order:
The
insert
algorithm runs, which will insert the
script
and
style
elements in order.
The HTML Standard’s
insertion steps
run for the
script
element; they do
nothing.
[HTML]
The HTML Standard’s
insertion steps
run for the
style
element; they immediately apply its style rules to the
document.
[HTML]
The HTML Standard’s
post-connection steps
run for the
script
element; they run
the script, which immediately observes the style rules that were applied in the above step.
[HTML]
Specifications
may also define
post-connection steps
for all or some
nodes
. The algorithm is passed
connectedNode
, as indicated in the
insert
algorithm below.
The purpose of the
post-connection steps
is to provide an opportunity for
nodes
to perform any connection-related operations that modify the
node tree
that
connectedNode
participates
in, create
browsing contexts
or otherwise execute JavaScript. These steps allow a batch of
nodes
to be
inserted
atomically
with respect to script, with all major side effects
occurring
after
the batch insertions into the
node tree
is complete. This ensures
that all pending
node tree
insertions completely finish before more insertions can occur.
Specifications
may define
children changed steps
for all or some
nodes
. The algorithm is passed no argument and is called from
insert
remove
, and
replace data
To
insert
node
node
into a
node
parent
before null or a
node
child
, with an
optional boolean
suppressObservers
(default false):
Let
nodes
be
node
’s
children
, if
node
is a
DocumentFragment
node
; otherwise «
node
».
Let
count
be
nodes
’s
size
If
count
is 0, then return.
If
node
is a
DocumentFragment
node
Remove
its
children
with
suppressObservers
set to true.
Queue a tree mutation record
for
node
with « »,
nodes
, null, and
null.
This step intentionally does not pay attention to
suppressObservers
If
child
is non-null:
For each
live range
whose
start node
is
parent
and
start offset
is greater than
child
’s
index
: increase
its
start offset
by
count
For each
live range
whose
end node
is
parent
and
end offset
is greater than
child
’s
index
: increase
its
end offset
by
count
Let
previousSibling
be
child
’s
previous sibling
or
parent
’s
last child
if
child
is null.
For each
node
in
nodes
, in
tree order
Adopt
node
into
parent
’s
node document
If
child
is null, then
append
node
to
parent
’s
children
Otherwise,
insert
node
into
parent
’s
children
before
child
’s
index
If
parent
is a
shadow host
whose
shadow root
’s
slot assignment
is "
named
" and
node
is a
slottable
, then
assign a slot
for
node
If
parent
’s
root
is a
shadow root
, and
parent
is a
slot
whose
assigned nodes
is the empty list,
then run
signal a slot change
for
parent
Run
assign slottables for a tree
with
node
’s
root
For each
shadow-including inclusive descendant
inclusiveDescendant
of
node
, in
shadow-including tree order
Run the
insertion steps
with
inclusiveDescendant
If
inclusiveDescendant
is not
connected
, then
continue
If
inclusiveDescendant
is an
element
and
inclusiveDescendant
’s
custom element registry
is non-null:
If
inclusiveDescendant
’s
custom element registry
’s
is scoped
is true, then
append
inclusiveDescendant
’s
node document
to
inclusiveDescendant
’s
custom element registry
’s
scoped document set
If
inclusiveDescendant
is
custom
, then
enqueue a custom element callback reaction
with
inclusiveDescendant
callback name "
connectedCallback
", and « ».
Otherwise,
try to upgrade
inclusiveDescendant
If this successfully upgrades
inclusiveDescendant
, its
connectedCallback
will be enqueued automatically during the
upgrade an element
algorithm.
Otherwise, if
inclusiveDescendant
is a
shadow root
inclusiveDescendant
’s
custom element registry
is non-null, and
inclusiveDescendant
’s
custom element registry
’s
is scoped
is true, then
append
inclusiveDescendant
’s
node document
to
inclusiveDescendant
’s
custom element registry
’s
scoped document set
If
suppressObservers
is false, then
queue a tree mutation record
for
parent
with
nodes
, « »,
previousSibling
, and
child
Run the
children changed steps
for
parent
Let
staticNodeList
be a
list
of
nodes
, initially « ».
We collect all
nodes
before
calling the
post-connection steps
on any one of them, instead of calling the
post-connection steps
while
we’re traversing the
node tree
. This is because
the
post-connection steps
can modify the tree’s structure, making live traversal unsafe,
possibly leading to the
post-connection steps
being called multiple times on the same
node
For each
node
of
nodes
, in
tree order
For each
shadow-including inclusive descendant
inclusiveDescendant
of
node
, in
shadow-including tree order
append
inclusiveDescendant
to
staticNodeList
For each
node
of
staticNodeList
: if
node
is
connected
, then run the
post-connection steps
with
node
To
append
node
node
to a
node
parent
pre-insert
node
into
parent
before
null.
Specifications
may define
moving steps
for all or some
nodes
. The
algorithm is passed a
node
movedNode
, a boolean
isSubtreeRoot
, and a
node
oldAncestor
as indicated in the
move
algorithm below. Like the
insertion steps
, these steps must not modify the
node tree
that
movedNode
participates
in, create
browsing contexts
fire events
, or otherwise execute JavaScript. These steps may queue tasks
to do these things asynchronously, however.
To
move
node
node
into a
node
newParent
before null or a
node
child
If
newParent
’s
shadow-including root
is not the same as
node
’s
shadow-including root
, then
throw
HierarchyRequestError
DOMException
This has the side effect of ensuring that a move is only performed if
newParent
’s
connected
is
node
’s
connected
If
node
is a
host-including inclusive ancestor
of
newParent
then
throw
a "
HierarchyRequestError
DOMException
If
child
is non-null and its
parent
is not
newParent
then
throw
a "
NotFoundError
DOMException
If
node
is not an
Element
or a
CharacterData
node
, then
throw
a "
HierarchyRequestError
DOMException
If
node
is a
Text
node
and
newParent
is a
document
, then
throw
a "
HierarchyRequestError
DOMException
If
newParent
is a
document
node
is an
Element
node
, and either
newParent
has an
element
child
child
is a
doctype
, or
child
is non-null and a
doctype
is
following
child
then
throw
HierarchyRequestError
DOMException
Let
oldParent
be
node
’s
parent
Assert
oldParent
is non-null.
Run the
live range pre-remove steps
, given
node
For each
NodeIterator
object
iterator
whose
root
’s
node document
is
node
’s
node document
: run the
NodeIterator
pre-remove steps
given
node
and
iterator
Let
oldPreviousSibling
be
node
’s
previous sibling
Let
oldNextSibling
be
node
’s
next sibling
Remove
node
from
oldParent
’s
children
If
node
is
assigned
, then run
assign slottables
for
node
’s
assigned slot
If
oldParent
’s
root
is a
shadow root
, and
oldParent
is a
slot
whose
assigned nodes
is empty
, then run
signal a slot change
for
oldParent
If
node
has an
inclusive descendant
that is a
slot
Run
assign slottables for a tree
with
oldParent
’s
root
Run
assign slottables for a tree
with
node
If
child
is non-null:
For each
live range
whose
start node
is
newParent
and
start offset
is greater than
child
’s
index
: increase
its
start offset
by 1.
For each
live range
whose
end node
is
newParent
and
end offset
is greater than
child
’s
index
: increase
its
end offset
by 1.
Let
newPreviousSibling
be
child
’s
previous sibling
if
child
is non-null, and
newParent
’s
last child
otherwise.
If
child
is null, then
append
node
to
newParent
’s
children
Otherwise,
insert
node
into
newParent
’s
children
before
child
’s
index
If
newParent
is a
shadow host
whose
shadow root
’s
slot assignment
is "
named
" and
node
is a
slottable
, then
assign a slot
for
node
If
newParent
’s
root
is a
shadow root
, and
newParent
is a
slot
whose
assigned nodes
is empty
, then run
signal a slot change
for
newParent
Run
assign slottables for a tree
with
node
’s
root
For each
shadow-including inclusive descendant
inclusiveDescendant
of
node
, in
shadow-including tree order
Let
isSubtreeRoot
be true if
inclusiveDescendant
is
node
; otherwise false.
Run the
moving steps
with
inclusiveDescendant
isSubtreeRoot
and
oldParent
Because the
move
algorithm is a separate primitive from
insert
and
remove
, it does not invoke the
insertion steps
or
removing steps
for
inclusiveDescendant
If
inclusiveDescendant
is
custom
and
newParent
is
connected
, then
enqueue a custom element callback reaction
with
inclusiveDescendant
, callback name "
connectedMoveCallback
", and « ».
Queue a tree mutation record
for
oldParent
with « », «
node
»,
oldPreviousSibling
, and
oldNextSibling
Queue a tree mutation record
for
newParent
with «
node
», « »,
newPreviousSibling
, and
child
To
replace
node
child
with
node
node
within a
node
parent
If
parent
is not a
Document
DocumentFragment
, or
Element
node
, then
throw
a "
HierarchyRequestError
DOMException
If
node
is a
host-including inclusive ancestor
of
parent
, then
throw
a "
HierarchyRequestError
DOMException
If
child
’s
parent
is not
parent
, then
throw
NotFoundError
DOMException
If
node
is not a
DocumentFragment
DocumentType
Element
, or
CharacterData
node
, then
throw
HierarchyRequestError
DOMException
If either
node
is a
Text
node
and
parent
is a
document
, or
node
is a
doctype
and
parent
is not a
document
, then
throw
a "
HierarchyRequestError
DOMException
If
parent
is a
document
, and any of the statements below, switched on
the interface
node
implements
, are true, then
throw
HierarchyRequestError
DOMException
DocumentFragment
If
node
has more than one
element
child
or has a
Text
node
child
Otherwise, if
node
has one
element
child
and either
parent
has an
element
child
that is not
child
or a
doctype
is
following
child
Element
parent
has an
element
child
that is not
child
or a
doctype
is
following
child
DocumentType
parent
has a
doctype
child
that is not
child
or an
element
is
preceding
child
The above statements differ from the
pre-insert
algorithm.
Let
referenceChild
be
child
’s
next sibling
If
referenceChild
is
node
, then set
referenceChild
to
node
’s
next sibling
Let
previousSibling
be
child
’s
previous sibling
Let
removedNodes
be the empty set.
If
child
’s
parent
is non-null:
Set
removedNodes
to «
child
».
Remove
child
with
suppressObservers
set
to true.
The above can only be false if
child
is
node
Let
nodes
be
node
’s
children
if
node
is a
DocumentFragment
node
; otherwise «
node
».
Insert
node
into
parent
before
referenceChild
with
suppressObservers
set to true.
Queue a tree mutation record
for
parent
with
nodes
removedNodes
previousSibling
, and
referenceChild
Return
child
To
replace all
with a
node
or
null
node
within a
node
parent
Let
removedNodes
be
parent
’s
children
Let
addedNodes
be the empty set.
If
node
is a
DocumentFragment
node
, then set
addedNodes
to
node
’s
children
Otherwise, if
node
is non-null, set
addedNodes
to «
node
».
Remove
all
parent
’s
children
, in
tree order
with
suppressObservers
set to true.
If
node
is non-null, then
insert
node
into
parent
before null with
suppressObservers
set to true.
If either
addedNodes
or
removedNodes
is not empty
then
queue a tree mutation record
for
parent
with
addedNodes
removedNodes
, null, and null.
This algorithm does not make any checks with regards to the
node tree
constraints. Specification authors need to use it wisely.
To
pre-remove
node
child
from a
node
parent
If
child
’s
parent
is not
parent
, then
throw
NotFoundError
DOMException
Remove
child
Return
child
Specifications
may define
removing steps
for all or some
nodes
. The
algorithm is passed a
node
removedNode
, a boolean
isSubtreeRoot
, and a
node
oldAncestor
as indicated
in the
remove
algorithm below.
To
remove
node
node
, with an
optional boolean
suppressObservers
(default false):
Let
parent
be
node
’s
parent
Assert:
parent
is non-null.
Run the
live range pre-remove steps
, given
node
For each
NodeIterator
object
iterator
whose
root
’s
node document
is
node
’s
node document
: run the
NodeIterator
pre-remove steps
given
node
and
iterator
Let
oldPreviousSibling
be
node
’s
previous sibling
Let
oldNextSibling
be
node
’s
next sibling
Remove
node
from its
parent
’s
children
If
node
is
assigned
, then run
assign slottables
for
node
’s
assigned slot
If
parent
’s
root
is a
shadow root
, and
parent
is a
slot
whose
assigned nodes
is the empty list,
then run
signal a slot change
for
parent
If
node
has an
inclusive descendant
that is a
slot
Run
assign slottables for a tree
with
parent
’s
root
Run
assign slottables for a tree
with
node
Run the
removing steps
with
node
, true, and
parent
Let
isParentConnected
be
parent
’s
connected
If
node
is
custom
and
isParentConnected
is true, then
enqueue a custom element callback reaction
with
node
, callback name
disconnectedCallback
", and « ».
It is intentional for now that
custom
elements
do
not get
parent
passed. This might change in the future if there is a need.
For each
shadow-including descendant
descendant
of
node
, in
shadow-including tree order
Run the
removing steps
with
descendant
, false, and
parent
If
descendant
is
custom
and
isParentConnected
is true, then
enqueue a custom element callback reaction
with
descendant
callback name "
disconnectedCallback
", and « ».
For each
inclusive ancestor
inclusiveAncestor
of
parent
, and then
for each
registered
of
inclusiveAncestor
’s
registered observer list
, if
registered
’s
options
["
subtree
"] is true, then
append
a new
transient registered observer
whose
observer
is
registered
’s
observer
options
is
registered
’s
options
, and
source
is
registered
to
node
’s
registered observer list
If
suppressObservers
is false, then
queue a tree mutation record
for
parent
with « », «
node
»,
oldPreviousSibling
, and
oldNextSibling
Run the
children changed steps
for
parent
4.2.4.
Mixin
NonElementParentNode
Web compatibility prevents the
getElementById()
method from being exposed on
elements
(and therefore on
ParentNode
).
interface
mixin
NonElementParentNode
Element
getElementById
DOMString
elementId
);
};
Document
includes
NonElementParentNode
DocumentFragment
includes
NonElementParentNode
node
getElementById
elementId
Returns the first
element
within
node
’s
descendants
whose
ID
is
elementId
The
getElementById(
elementId
method steps are to return the first
element
, in
tree order
, within
this
’s
descendants
, whose
ID
is
elementId
otherwise, if there is no such
element
, null.
4.2.5.
Mixin
DocumentOrShadowRoot
interface
mixin
DocumentOrShadowRoot
readonly
attribute
CustomElementRegistry
customElementRegistry
};
Document
includes
DocumentOrShadowRoot
ShadowRoot
includes
DocumentOrShadowRoot
registry
documentOrShadowRoot
customElementRegistry
Returns
documentOrShadowRoot
’s
CustomElementRegistry
object, if any;
otherwise null.
The
customElementRegistry
getter steps
are:
If
this
is a
document
, then return
this
’s
custom element registry
Assert
this
is a
ShadowRoot
node
Return
this
’s
custom element registry
The
DocumentOrShadowRoot
mixin is also expected to be used by other
standards that want to define APIs shared between
documents
and
shadow roots
4.2.6.
Mixin
ParentNode
To
convert nodes into a node
, given a
list
of
nodes
and
strings
nodes
, and
document
document
Replace each string of
nodes
with a new
Text
node
whose
data
is the string and
node document
is
document
If
nodes
’s
size
is 1, then return
nodes
[0].
Let
fragment
be a new
DocumentFragment
node
whose
node document
is
document
For each
node
of
nodes
append
node
to
fragment
Return
fragment
interface
mixin
ParentNode
SameObject
readonly
attribute
HTMLCollection
children
readonly
attribute
Element
firstElementChild
readonly
attribute
Element
lastElementChild
readonly
attribute
unsigned
long
childElementCount

CEReactions
Unscopable
undefined
prepend
((
Node
or
DOMString
)...
nodes
);
CEReactions
Unscopable
undefined
append
((
Node
or
DOMString
)...
nodes
);
CEReactions
Unscopable
undefined
replaceChildren
((
Node
or
DOMString
)...
nodes
);

CEReactions
undefined
moveBefore
Node
node
Node
child
);
Element
querySelector
DOMString
selectors
);
NewObject
NodeList
querySelectorAll
DOMString
selectors
);
};
Document
includes
ParentNode
DocumentFragment
includes
ParentNode
Element
includes
ParentNode
collection
node
children
Returns the
child
elements
element
node
firstElementChild
Returns the first
child
that is an
element
; otherwise null.
element
node
lastElementChild
Returns the last
child
that is an
element
; otherwise null.
node
prepend
nodes
Inserts
nodes
before the
first child
of
node
, while
replacing strings in
nodes
with equivalent
Text
nodes
Throws
a "
HierarchyRequestError
DOMException
if the constraints of
the
node tree
are violated.
node
append
nodes
Inserts
nodes
after the
last child
of
node
, while replacing
strings in
nodes
with equivalent
Text
nodes
Throws
a "
HierarchyRequestError
DOMException
if the constraints of
the
node tree
are violated.
node
replaceChildren
nodes
Replace all
children
of
node
with
nodes
while replacing strings in
nodes
with equivalent
Text
nodes
Throws
a "
HierarchyRequestError
DOMException
if the constraints of
the
node tree
are violated.
node
moveBefore
movedNode
child
Moves, without first removing,
movedNode
into
node
after
child
if
child
is non-null; otherwise after the
last child
of
node
. This
method preserves state associated with
movedNode
Throws
a "
HierarchyRequestError
DOMException
if the constraints of
the
node tree
are violated, or the state associated with the moved node cannot be
preserved.
node
querySelector
selectors
Returns the first
element
that is a
descendant
of
node
that matches
selectors
node
querySelectorAll
selectors
Returns all
element
descendants
of
node
that match
selectors
The
children
getter steps are to return an
HTMLCollection
collection
rooted at
this
matching only
element
children
The
firstElementChild
getter steps are to return
the first
child
that is an
element
; otherwise null.
The
lastElementChild
getter steps are to return
the last
child
that is an
element
; otherwise null.
The
childElementCount
getter steps are to return
the number of
children
of
this
that are
elements
The
prepend(
nodes
method steps are:
Let
node
be the result of
converting nodes into a node
given
nodes
and
this
’s
node document
Pre-insert
node
into
this
before
this
’s
first child
The
append(
nodes
method steps are:
Let
node
be the result of
converting nodes into a node
given
nodes
and
this
’s
node document
Append
node
to
this
The
replaceChildren(
nodes
method steps
are:
Let
node
be the result of
converting nodes into a node
given
nodes
and
this
’s
node document
Ensure pre-insert validity
of
node
into
this
before null.
Replace all
with
node
within
this
The
moveBefore(
node
child
method steps are:
Let
referenceChild
be
child
If
referenceChild
is
node
, then set
referenceChild
to
node
’s
next sibling
Move
node
into
this
before
referenceChild
The
querySelector(
selectors
method
steps are to return the first result of running
scope-match a selectors string
selectors
against
this
, if the result is not an empty list; otherwise null.
The
querySelectorAll(
selectors
method
steps are to return the
static
result of running
scope-match a selectors string
selectors
against
this
4.2.7.
Mixin
NonDocumentTypeChildNode
Web compatibility prevents the
previousElementSibling
and
nextElementSibling
attributes from being exposed on
doctypes
(and therefore on
ChildNode
).
interface
mixin
NonDocumentTypeChildNode
readonly
attribute
Element
previousElementSibling
readonly
attribute
Element
nextElementSibling
};
Element
includes
NonDocumentTypeChildNode
CharacterData
includes
NonDocumentTypeChildNode
element
node
previousElementSibling
Returns the first
preceding
sibling
that is an
element
otherwise null.
element
node
nextElementSibling
Returns the first
following
sibling
that is an
element
otherwise null.
The
previousElementSibling
getter
steps are to return the first
preceding
sibling
that is an
element
; otherwise null.
The
nextElementSibling
getter
steps are to return the first
following
sibling
that is an
element
; otherwise null.
4.2.8.
Mixin
ChildNode
interface
mixin
ChildNode
CEReactions
Unscopable
undefined
before
((
Node
or
DOMString
)...
nodes
);
CEReactions
Unscopable
undefined
after
((
Node
or
DOMString
)...
nodes
);
CEReactions
Unscopable
undefined
replaceWith
((
Node
or
DOMString
)...
nodes
);
CEReactions
Unscopable
undefined
remove
();
};
DocumentType
includes
ChildNode
Element
includes
ChildNode
CharacterData
includes
ChildNode
node
before(...nodes)
Inserts
nodes
just before
node
, while replacing strings in
nodes
with equivalent
Text
nodes
Throws
a "
HierarchyRequestError
DOMException
if the constraints of
the
node tree
are violated.
node
after(...nodes)
Inserts
nodes
just after
node
, while replacing strings in
nodes
with equivalent
Text
nodes
Throws
a "
HierarchyRequestError
DOMException
if the constraints of
the
node tree
are violated.
node
replaceWith(...nodes)
Replaces
node
with
nodes
, while replacing strings in
nodes
with equivalent
Text
nodes
Throws
a "
HierarchyRequestError
DOMException
if the constraints of
the
node tree
are violated.
node
remove()
Removes
node
The
before(
nodes
method steps are:
Let
parent
be
this
’s
parent
If
parent
is null, then return.
Let
viablePreviousSibling
be
this
’s first
preceding
sibling
not in
nodes
; otherwise null.
Let
node
be the result of
converting nodes into a node
, given
nodes
and
this
’s
node document
If
viablePreviousSibling
is null, then set it to
parent
’s
first child
; otherwise to
viablePreviousSibling
’s
next sibling
Pre-insert
node
into
parent
before
viablePreviousSibling
The
after(
nodes
method steps are:
Let
parent
be
this
’s
parent
If
parent
is null, then return.
Let
viableNextSibling
be
this
’s first
following
sibling
not in
nodes
; otherwise null.
Let
node
be the result of
converting nodes into a node
, given
nodes
and
this
’s
node document
Pre-insert
node
into
parent
before
viableNextSibling
The
replaceWith(
nodes
method steps are:
Let
parent
be
this
’s
parent
If
parent
is null, then return.
Let
viableNextSibling
be
this
’s first
following
sibling
not in
nodes
; otherwise null.
Let
node
be the result of
converting nodes into a node
, given
nodes
and
this
’s
node document
If
this
’s
parent
is
parent
replace
this
with
node
within
parent
This
could have been inserted into
node
Otherwise,
pre-insert
node
into
parent
before
viableNextSibling
The
remove()
method steps are:
If
this
’s
parent
is null, then return.
Remove
this
4.2.9.
Mixin
Slottable
interface
mixin
Slottable
readonly
attribute
HTMLSlotElement
assignedSlot
};
Element
includes
Slottable
Text
includes
Slottable
The
assignedSlot
getter steps are to return the result of
find a slot
given
this
and true.
4.2.10.
Old-style collections:
NodeList
and
HTMLCollection
collection
is an object that represents a list of
nodes
. A
collection
can be either
live
or
static
Unless otherwise stated, a
collection
must be
live
If a
collection
is
live
, then the attributes and methods
on that object must operate on the actual underlying data, not a snapshot of
the data.
When a
collection
is created, a
filter and a root are associated with it.
The
collection
then
represents
a view of the subtree rooted at the
collection’s
root, containing only nodes that match the
given filter. The view is linear. In the absence of specific requirements to the contrary, the nodes
within the
collection
must be sorted in
tree order
4.2.10.1.
Interface
NodeList
NodeList
object is a
collection
of
nodes
Exposed
Window
interface
NodeList
getter
Node
item
unsigned
long
index
);
readonly
attribute
unsigned
long
length
iterable
Node
>;
};
collection
length
Returns the number of
nodes
in the
collection
element
collection
item(index)
element
collection
index
Returns the
node
with index
index
from the
collection
. The
nodes
are sorted in
tree order
The object’s
supported property indices
are the numbers in the range zero to one less than
the number of nodes
represented by the collection
. If there are no such
elements, then there are no
supported property indices
The
length
attribute must return the number of nodes
represented by the collection
The
item(
index
method must return the
index
th
node
in the
collection
. If there is no
index
th
node
in the
collection
, then the method must
return null.
4.2.10.2.
Interface
HTMLCollection
Exposed
Window
LegacyUnenumerableNamedProperties
interface
HTMLCollection
readonly
attribute
unsigned
long
length
getter
Element
item
unsigned
long
index
);
getter
Element
namedItem
DOMString
name
);
};
An
HTMLCollection
object is a
collection
of
elements
HTMLCollection
is a historical artifact we cannot rid the web of.
While developers are of course welcome to keep using it, new API standard designers ought not to use
it (use
sequence
in IDL instead).
collection
length
Returns the number of
elements
in
the
collection
element
collection
item(index)
element
collection
index
Returns the
element
with index
index
from the
collection
The
elements
are sorted in
tree order
element
collection
namedItem(name)
element
collection
name
Returns the first
element
with
ID
or name
name
from the collection.
The object’s
supported property indices
are the numbers in the range zero to one less than
the number of elements
represented by the collection
. If there are no such
elements, then there are no
supported property indices
The
length
getter steps are to return the
number of nodes
represented by the collection
The
item(
index
method steps are to
return the
index
th
element
in the
collection
. If there
is no
index
th
element
in the
collection
, then the method
must return null.
The
supported property names
are the values from the list returned by these steps:
Let
result
be an empty list.
For each
element
represented by the collection
, in
tree order
If
element
has an
ID
which is not in
result
append
element
’s
ID
to
result
If
element
is in the
HTML namespace
and
has
name
attribute
whose
value
is neither
the empty string nor is in
result
, append
element
’s
name
attribute
value
to
result
Return
result
The
namedItem(
key
method steps are:
If
key
is the empty string, return null.
Return the first
element
in the
collection
for which at least one of
the following is true:
it has an
ID
which is
key
it is in the
HTML namespace
and
has
name
attribute
whose
value
is
key
or null if there is no such
element
4.3.
Mutation observers
Each
similar-origin window agent
has a
mutation observer microtask queued
(a boolean), which is initially false.
[HTML]
Each
similar-origin window agent
also has
pending mutation observers
(a
set
of zero or more
MutationObserver
objects), which is initially empty.
To
queue a mutation observer microtask
If the
surrounding agent
’s
mutation observer microtask queued
is true, then
return.
Set the
surrounding agent
’s
mutation observer microtask queued
to true.
Queue
microtask
to
notify mutation observers
To
notify mutation observers
Set the
surrounding agent
’s
mutation observer microtask queued
to false.
Let
notifySet
be a
clone
of the
surrounding agent
’s
pending mutation observers
Empty
the
surrounding agent
’s
pending mutation observers
Let
signalSet
be a
clone
of the
surrounding agent
’s
signal slots
Empty
the
surrounding agent
’s
signal slots
For each
mo
of
notifySet
Let
records
be a
clone
of
mo
’s
record queue
Empty
mo
’s
record queue
For each
node
of
mo
’s
node list
remove
all
transient registered observers
whose
observer
is
mo
from
node
’s
registered observer list
If
records
is not empty
, then
invoke
mo
’s
callback
with «
records
mo
and "
report
", and with
callback this value
mo
For each
slot
of
signalSet
fire an event
named
slotchange
, with its
bubbles
attribute set to true,
at
slot
Each
node
has a
registered observer list
(a
list
of
zero or more
registered observers
), which is initially empty.
registered observer
consists of an
observer
(a
MutationObserver
object) and
options
(a
MutationObserverInit
dictionary).
transient registered observer
is a
registered observer
that also consists of a
source
(a
registered observer
).
Transient registered observers
are used to track mutations within
a given
node
’s
descendants
after
node
has been removed so
they do not get lost when
subtree
is set to true on
node
’s
parent
4.3.1.
Interface
MutationObserver
Exposed
Window
interface
MutationObserver
constructor
MutationCallback
callback
);
undefined
observe
Node
target
optional
MutationObserverInit
options
= {});
undefined
disconnect
();
sequence
MutationRecord
takeRecords
();
};
callback
MutationCallback
undefined
sequence
MutationRecord
mutations
MutationObserver
observer
);
dictionary
MutationObserverInit
boolean
childList
false
boolean
attributes
boolean
characterData
boolean
subtree
false
boolean
attributeOldValue
boolean
characterDataOldValue
sequence
DOMString
attributeFilter
};
MutationObserver
object can be used to observe mutations to the
tree
of
nodes
Each
MutationObserver
object has these associated concepts:
callback
set on creation.
node list
(a
list
of weak references to
nodes
), which is initially empty.
record queue
(a
queue
of
zero or more
MutationRecord
objects), which is initially empty.
observer
= new
MutationObserver(callback)
Constructs a
MutationObserver
object and sets its
callback
to
callback
. The
callback
is invoked with a list of
MutationRecord
objects
as first argument and the constructed
MutationObserver
object as second argument. It is
invoked after
nodes
registered with the
observe()
method, are
mutated.
observer
observe(target, options)
Instructs the user agent to observe a given
target
(a
node
) and report any mutations based on
the criteria given by
options
(an object).
The
options
argument allows for setting mutation
observation options via object members. These are the object members that
can be used:
childList
Set to true if mutations to
target
’s
children
are to be observed.
attributes
Set to true if mutations to
target
’s
attributes
are to be observed. Can be omitted if
attributeOldValue
or
attributeFilter
is
specified.
characterData
Set to true if mutations to
target
’s
data
are to be observed. Can be omitted if
characterDataOldValue
is specified.
subtree
Set to true if mutations to not just
target
, but
also
target
’s
descendants
are to be
observed.
attributeOldValue
Set to true if
attributes
is true or omitted
and
target
’s
attribute
value
before the mutation
needs to be recorded.
characterDataOldValue
Set to true if
characterData
is set to true or omitted and
target
’s
data
before the mutation
needs to be recorded.
attributeFilter
Set to a list of
attribute
local names
(without
namespace
) if not all
attribute
mutations need to be
observed and
attributes
is true
or omitted.
observer
disconnect()
Stops
observer
from observing any mutations. Until the
observe()
method is used
again,
observer
’s
callback
will not be invoked.
observer
takeRecords()
Empties the
record queue
and
returns what was in there.
The
new MutationObserver(
callback
constructor steps are to set
this
’s
callback
to
callback
The
observe(
target
options
method steps are:
If either
options
["
attributeOldValue
"] or
options
["
attributeFilter
"]
exists
, and
options
["
attributes
"] does not
exist
, then set
options
["
attributes
"] to true.
If
options
["
characterDataOldValue
"]
exists
and
options
["
characterData
"] does not
exist
, then set
options
["
characterData
"] to
true.
If none of
options
["
childList
"],
options
["
attributes
"], and
options
["
characterData
"] is true, then
throw
TypeError
If
options
["
attributeOldValue
"] is true and
options
["
attributes
"] is false, then
throw
TypeError
If
options
["
attributeFilter
"] is present and
options
["
attributes
"] is false, then
throw
TypeError
If
options
["
characterDataOldValue
"] is true and
options
["
characterData
"] is false, then
throw
TypeError
For each
registered
of
target
’s
registered observer list
: if
registered
’s
observer
is
this
For each
node
of
this
’s
node list
remove
all
transient registered observers
whose
source
is
registered
from
node
’s
registered observer list
Set
registered
’s
options
to
options
Otherwise:
Append
a new
registered observer
whose
observer
is
this
and
options
is
options
to
target
’s
registered observer list
Append
a weak reference to
target
to
this
’s
node list
The
disconnect()
method steps are:
For each
node
of
this
’s
node list
remove
any
registered observer
from
node
’s
registered observer list
for which
this
is the
observer
Empty
this
’s
record queue
The
takeRecords()
method steps are:
Let
records
be a
clone
of
this
’s
record queue
Empty
this
’s
record queue
Return
records
4.3.2.
Queuing a mutation record
To
queue a mutation record
of
type
for
target
with
name
namespace
oldValue
addedNodes
removedNodes
previousSibling
, and
nextSibling
Let
interestedObservers
be an empty
map
Let
nodes
be the
inclusive ancestors
of
target
For each
node
of
nodes
, and then
for each
registered
of
node
’s
registered observer list
Let
options
be
registered
’s
options
If none of the following are true
node
is not
target
and
options
["
subtree
"] is false
type
is "
attributes
" and
options
["
attributes
"] either does not
exist
or is false
type
is "
attributes
",
options
["
attributeFilter
"]
exists
, and
options
["
attributeFilter
"] does not
contain
name
or
namespace
is non-null
type
is "
characterData
" and
options
["
characterData
"] either does not
exist
or is false
type
is "
childList
" and
options
["
childList
"] is false
then:
Let
mo
be
registered
’s
observer
If
interestedObservers
mo
] does not
exist
, then
set
interestedObservers
mo
] to null.
If either
type
is "
attributes
" and
options
["
attributeOldValue
"] is true, or
type
is
characterData
" and
options
["
characterDataOldValue
"] is true, then
set
interestedObservers
mo
] to
oldValue
For each
observer
mappedOldValue
of
interestedObservers
Let
record
be a new
MutationRecord
object with its
type
set to
type
target
set to
target
attributeName
set to
name
attributeNamespace
set to
namespace
oldValue
set to
mappedOldValue
addedNodes
set to
addedNodes
removedNodes
set to
removedNodes
previousSibling
set to
previousSibling
, and
nextSibling
set to
nextSibling
Enqueue
record
to
observer
’s
record queue
Append
observer
to the
surrounding agent
’s
pending mutation observers
Queue a mutation observer microtask
To
queue a tree mutation record
for
target
with
addedNodes
removedNodes
previousSibling
, and
nextSibling
Assert
: either
addedNodes
or
removedNodes
is not empty
Queue a mutation record
of "
childList
" for
target
with
null, null, null,
addedNodes
removedNodes
previousSibling
and
nextSibling
4.3.3.
Interface
MutationRecord
Exposed
Window
interface
MutationRecord
readonly
attribute
DOMString
type
SameObject
readonly
attribute
Node
target
SameObject
readonly
attribute
NodeList
addedNodes
SameObject
readonly
attribute
NodeList
removedNodes
readonly
attribute
Node
previousSibling
readonly
attribute
Node
nextSibling
readonly
attribute
DOMString
attributeName
readonly
attribute
DOMString
attributeNamespace
readonly
attribute
DOMString
oldValue
};
record
type
Returns "
attributes
" if it was an
attribute
mutation.
characterData
" if it was a mutation to a
CharacterData
node
. And
childList
" if it was a mutation to the
tree
of
nodes
record
target
Returns the
node
the mutation
affected, depending on the
type
For "
attributes
", it is the
element
whose
attribute
changed. For
characterData
", it is the
CharacterData
node
. For "
childList
",
it is the
node
whose
children
changed.
record
addedNodes
record
removedNodes
Return the
nodes
added and removed
respectively.
record
previousSibling
record
nextSibling
Return the
previous
and
next sibling
respectively
of the added or removed
nodes
; otherwise null.
record
attributeName
Returns the
local name
of the changed
attribute
; otherwise null.
record
attributeNamespace
Returns the
namespace
of the changed
attribute
; otherwise null.
record
oldValue
The return value depends on
type
. For
attributes
", it is the
value
of the
changed
attribute
before the change.
For "
characterData
", it is the
data
of the changed
node
before the change. For
childList
", it is null.
The
type
target
addedNodes
removedNodes
previousSibling
nextSibling
attributeName
attributeNamespace
, and
oldValue
attributes must return the values they were
initialized to.
4.4.
Interface
Node
Exposed
Window
interface
Node
EventTarget
const
unsigned
short
ELEMENT_NODE
= 1;
const
unsigned
short
ATTRIBUTE_NODE
= 2;
const
unsigned
short
TEXT_NODE
= 3;
const
unsigned
short
CDATA_SECTION_NODE
= 4;
const
unsigned
short
ENTITY_REFERENCE_NODE
= 5; // legacy
const
unsigned
short
ENTITY_NODE
= 6; // legacy
const
unsigned
short
PROCESSING_INSTRUCTION_NODE
= 7;
const
unsigned
short
COMMENT_NODE
= 8;
const
unsigned
short
DOCUMENT_NODE
= 9;
const
unsigned
short
DOCUMENT_TYPE_NODE
= 10;
const
unsigned
short
DOCUMENT_FRAGMENT_NODE
= 11;
const
unsigned
short
NOTATION_NODE
= 12; // legacy
readonly
attribute
unsigned
short
nodeType
readonly
attribute
DOMString
nodeName
readonly
attribute
USVString
baseURI
readonly
attribute
boolean
isConnected
readonly
attribute
Document
ownerDocument
Node
getRootNode
optional
GetRootNodeOptions
options
= {});
readonly
attribute
Node
parentNode
readonly
attribute
Element
parentElement
boolean
hasChildNodes
();
SameObject
readonly
attribute
NodeList
childNodes
readonly
attribute
Node
firstChild
readonly
attribute
Node
lastChild
readonly
attribute
Node
previousSibling
readonly
attribute
Node
nextSibling

CEReactions
attribute
DOMString
nodeValue
CEReactions
attribute
DOMString
textContent
CEReactions
undefined
normalize
();

CEReactions
NewObject
Node
cloneNode
optional
boolean
subtree
false
);
boolean
isEqualNode
Node
otherNode
);
boolean
isSameNode
Node
otherNode
); // legacy alias of ===
const
unsigned
short
DOCUMENT_POSITION_DISCONNECTED
= 0x01;
const
unsigned
short
DOCUMENT_POSITION_PRECEDING
= 0x02;
const
unsigned
short
DOCUMENT_POSITION_FOLLOWING
= 0x04;
const
unsigned
short
DOCUMENT_POSITION_CONTAINS
= 0x08;
const
unsigned
short
DOCUMENT_POSITION_CONTAINED_BY
= 0x10;
const
unsigned
short
DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC
= 0x20;
unsigned
short
compareDocumentPosition
Node
other
);
boolean
contains
Node
other
);
DOMString
lookupPrefix
DOMString
namespace
);
DOMString
lookupNamespaceURI
DOMString
prefix
);
boolean
isDefaultNamespace
DOMString
namespace
);

CEReactions
Node
insertBefore
Node
node
Node
child
);
CEReactions
Node
appendChild
Node
node
);
CEReactions
Node
replaceChild
Node
node
Node
child
);
CEReactions
Node
removeChild
Node
child
);
};
dictionary
GetRootNodeOptions
boolean
composed
false
};
Node
is an abstract interface that is used by all
nodes
. You cannot
get a direct instance of it.
Each
node
has an associated
node document
, set upon creation, that is a
document
node
’s
node document
can be changed by the
adopt
algorithm.
node
’s
get the parent
algorithm, given an
event
, returns the
node
’s
assigned slot
, if
node
is
assigned
; otherwise
node
’s
parent
Each
node
also has a
registered observer list
node
nodeType
Returns a number appropriate for the type of
node
, as follows:
Element
Node
ELEMENT_NODE
(1).
Attr
Node
ATTRIBUTE_NODE
(2).
An
exclusive
Text
node
Node
TEXT_NODE
(3).
CDATASection
Node
CDATA_SECTION_NODE
(4).
ProcessingInstruction
Node
PROCESSING_INSTRUCTION_NODE
(7).
Comment
Node
COMMENT_NODE
(8).
Document
Node
DOCUMENT_NODE
(9).
DocumentType
Node
DOCUMENT_TYPE_NODE
(10).
DocumentFragment
Node
DOCUMENT_FRAGMENT_NODE
(11).
node
nodeName
Returns a string appropriate for the type of
node
, as follows:
Element
Its
HTML-uppercased qualified name
Attr
Its
qualified name
An
exclusive
Text
node
#text
".
CDATASection
#cdata-section
".
ProcessingInstruction
Its
target
Comment
#comment
".
Document
#document
".
DocumentType
Its
name
DocumentFragment
#document-fragment
".
The
nodeType
getter steps are to return the first matching
statement, switching on the interface
this
implements
Element
ELEMENT_NODE
(1)
Attr
ATTRIBUTE_NODE
(2);
An
exclusive
Text
node
TEXT_NODE
(3);
CDATASection
CDATA_SECTION_NODE
(4);
ProcessingInstruction
PROCESSING_INSTRUCTION_NODE
(7);
Comment
COMMENT_NODE
(8);
Document
DOCUMENT_NODE
(9);
DocumentType
DOCUMENT_TYPE_NODE
(10);
DocumentFragment
DOCUMENT_FRAGMENT_NODE
(11).
The
nodeName
getter steps are to return the first matching
statement, switching on the interface
this
implements
Element
Its
HTML-uppercased qualified name
Attr
Its
qualified name
An
exclusive
Text
node
#text
".
CDATASection
#cdata-section
".
ProcessingInstruction
Its
target
Comment
#comment
".
Document
#document
".
DocumentType
Its
name
DocumentFragment
#document-fragment
".
node
baseURI
Returns
node
’s
node document
’s
document base URL
The
baseURI
getter steps are to return
this
’s
node document
’s
document base URL
serialized
node
isConnected
Returns true if
node
is
connected
; otherwise false.
node
ownerDocument
Returns the
node document
Returns null for
documents
node
getRootNode()
Returns
node
’s
root
node
getRootNode
({ composed:true })
Returns
node
’s
shadow-including root
node
parentNode
Returns the
parent
node
parentElement
Returns the
parent element
node
hasChildNodes()
Returns whether
node
has
children
node
childNodes
Returns the
children
node
firstChild
Returns the
first child
node
lastChild
Returns the
last child
node
previousSibling
Returns the
previous sibling
node
nextSibling
Returns the
next sibling
The
isConnected
getter steps are to return true,
if
this
is
connected
; otherwise false.
The
ownerDocument
getter steps are to return null,
if
this
is a
document
; otherwise
this
’s
node document
The
node document
of a
document
is that
document
itself. All
nodes
have a
node document
at all
times.
The
getRootNode(
options
method steps are to
return
this
’s
shadow-including root
if
options
["
composed
"] is true; otherwise
this
’s
root
The
parentNode
getter steps are to return
this
’s
parent
The
parentElement
getter steps are to return
this
’s
parent element
The
hasChildNodes()
method steps are to return true if
this
has
children
; otherwise false.
The
childNodes
getter steps are to return a
NodeList
rooted at
this
matching only
children
The
firstChild
getter steps are to return
this
’s
first child
The
lastChild
getter steps are to return
this
’s
last child
The
previousSibling
getter steps are to return
this
’s
previous sibling
The
nextSibling
getter steps are to return
this
’s
next sibling
The
nodeValue
getter steps are to return the following, switching
on the interface
this
implements
Attr
this
’s
value
CharacterData
this
’s
data
Otherwise
Null.
The
nodeValue
setter steps are to, if the given value is null, act as if it was the
empty string instead, and then do as described below, switching on the interface
this
implements
Attr
Set an existing attribute value
with
this
and the given value.
CharacterData
Replace data
of
this
with 0,
this
’s
length
, and
the given value.
Otherwise
Do nothing.
To
get text content
with a
node
node
return the following, switching on the interface
node
implements
DocumentFragment
Element
The
descendant text content
of
node
Attr
node
’s
value
CharacterData
node
’s
data
Otherwise
Null.
The
textContent
getter steps are to
return the result of running
get text content
with
this
To
string replace all
with a string
string
within a
node
parent
, run these steps:
Let
node
be null.
If
string
is not the empty string, then set
node
to a new
Text
node
whose
data
is
string
and
node document
is
parent
’s
node document
Replace all
with
node
within
parent
To
set text content
with a
node
node
and a string
value
do as defined below, switching on the interface
node
implements
DocumentFragment
Element
String replace all
with
value
within
node
Attr
Set an existing attribute value
with
node
and
value
CharacterData
Replace data
of
node
with 0,
node
’s
length
, and
value
Otherwise
Do nothing.
The
textContent
setter steps are to, if the given value is null, act as if it was the
empty string instead, and then run
set text content
with
this
and the given value.
node
normalize()
Removes
empty
exclusive
Text
nodes
and concatenates the
data
of remaining
contiguous exclusive
Text
nodes
into the first of their
nodes
The
normalize()
method steps are to run these steps for
each
descendant
exclusive
Text
node
node
of
this
Let
length
be
node
’s
length
If
length
is zero, then
remove
node
and continue with the
next
exclusive
Text
node
, if any.
Let
data
be the
concatenation
of the
data
of
node
’s
contiguous exclusive
Text
nodes
(excluding itself), in
tree order
Replace data
of
node
with
length
, 0, and
data
Let
currentNode
be
node
’s
next sibling
While
currentNode
is an
exclusive
Text
node
For each
live range
whose
start node
is
currentNode
add
length
to its
start offset
and set its
start node
to
node
For each
live range
whose
end node
is
currentNode
: add
length
to its
end offset
and set its
end node
to
node
For each
live range
whose
start node
is
currentNode
’s
parent
and
start offset
is
currentNode
’s
index
: set its
start node
to
node
and its
start offset
to
length
For each
live range
whose
end node
is
currentNode
’s
parent
and
end offset
is
currentNode
’s
index
: set its
end node
to
node
and its
end offset
to
length
Add
currentNode
’s
length
to
length
Set
currentNode
to its
next sibling
Remove
node
’s
contiguous exclusive
Text
nodes
(excluding itself), in
tree order
node
cloneNode
([
subtree
= false])
Returns a copy of
node
. If
subtree
is true, the copy also includes the
node
’s
descendants
node
isEqualNode
otherNode
Returns whether
node
and
otherNode
have the same properties.
Specifications
may define
cloning steps
for all or some
nodes
. The
algorithm is passed
node
copy
, and
subtree
as
indicated in the
clone a node
algorithm.
HTML defines
cloning steps
for several elements, such as
input
script
and
template
. SVG ought to do the same for its
script
elements, but does not.
To
clone a node
given a
node
node
and an optional
document
document
(default
node
’s
node document
), boolean
subtree
(default false),
node
-or-null
parent
(default null), and null or a
CustomElementRegistry
object
fallbackRegistry
(default null):
Assert
node
is not a
document
or
node
is
document
Let
copy
be the result of
cloning a single node
given
node
document
, and
fallbackRegistry
Run any
cloning steps
defined for
node
in
other applicable specifications
and pass
node
copy
, and
subtree
as parameters.
If
parent
is non-null, then
append
copy
to
parent
If
subtree
is true, then for each
child
of
node
’s
children
, in
tree order
clone a node
given
child
with
document
set to
document
subtree
set to
subtree
parent
set to
copy
, and
fallbackRegistry
set to
fallbackRegistry
If
node
is an
element
node
is a
shadow host
, and
node
’s
shadow root
’s
clonable
is true:
Assert
copy
is not a
shadow host
Let
shadowRootRegistry
be
node
’s
shadow root
’s
custom element registry
If
shadowRootRegistry
is a global custom element registry
, then set
shadowRootRegistry
to
document
’s
effective global custom element registry
Attach a shadow root
with
copy
node
’s
shadow root
’s
mode
, true,
node
’s
shadow root
’s
serializable
node
’s
shadow root
’s
delegates focus
node
’s
shadow root
’s
slot assignment
, and
shadowRootRegistry
Set
copy
’s
shadow root
’s
declarative
to
node
’s
shadow root
’s
declarative
Set
copy
’s
shadow root
’s
keep custom element registry null
to
node
’s
shadow root
’s
keep custom element registry null
For each
child
of
node
’s
shadow root
’s
children
, in
tree order
clone a node
given
child
with
document
set to
document
subtree
set to
subtree
, and
parent
set to
copy
’s
shadow root
This intentionally does not pass the
fallbackRegistry
argument.
Return
copy
To
clone a single node
given a
node
node
document
document
, and null or a
CustomElementRegistry
object
fallbackRegistry
Let
copy
be null.
If
node
is an
element
Let
registry
be
node
’s
custom element registry
If
registry
is null, then set
registry
to
fallbackRegistry
If
registry
is a global custom element registry
, then set
registry
to
document
’s
effective global custom element registry
Set
copy
to the result of
creating an element
, given
document
node
’s
local name
node
’s
namespace
node
’s
namespace prefix
node
’s
is
value
, false, and
registry
For each
attribute
of
node
’s
attribute list
Let
copyAttribute
be the result of
cloning a single node
given
attribute
document
, and null.
Append
copyAttribute
to
copy
Otherwise, set
copy
to a
node
that
implements
the same
interfaces as
node
, and fulfills these additional requirements, switching on the
interface
node
implements
Document
Set
copy
’s
encoding
content type
URL
origin
type
mode
, and
allow declarative shadow roots
, to those of
node
If
node
’s
custom element registry
’s
is scoped
is true, then set
copy
’s
custom element registry
to
node
’s
custom element registry
DocumentType
Set
copy
’s
name
public ID
, and
system ID
to those of
node
Attr
Set
copy
’s
namespace
namespace prefix
local name
, and
value
to those of
node
Text
Comment
Set
copy
’s
data
to that of
node
ProcessingInstruction
Set
copy
’s
target
and
data
to those of
node
Otherwise
Do nothing.
Assert
copy
is a
node
If
node
is a
document
, then set
document
to
copy
Set
copy
’s
node document
to
document
Return
copy
The
cloneNode(
subtree
method steps are:
If
this
is a
shadow root
, then
throw
NotSupportedError
DOMException
Return the result of
cloning a node
given
this
with
subtree
set to
subtree
node
equals
node
if all of the following conditions are true:
and
implement
the same interfaces.
The following are equal, switching on the interface
implements
DocumentType
Its
name
public ID
, and
system ID
Element
Its
namespace
namespace prefix
local name
, and its
attribute list
’s
size
Attr
Its
namespace
local name
, and
value
ProcessingInstruction
Its
target
and
data
Text
Comment
Its
data
Otherwise
If
is an
element
, each
attribute
in its
attribute list
equals
an
attribute
in
’s
attribute list
and
have the same number of
children
Each
child
of
equals
the
child
of
at the identical
index
The
isEqualNode(
otherNode
method steps are to
return true if
otherNode
is non-null and
this
equals
otherNode
; otherwise false.
The
isSameNode(
otherNode
method steps are to
return true if
otherNode
is
this
; otherwise false.
node
compareDocumentPosition(other)
Returns a bitmask indicating the position of
other
relative to
node
. These are the bits that can be set:
Node
DOCUMENT_POSITION_DISCONNECTED
(1)
Set when
node
and
other
are not in the
same
tree
Node
DOCUMENT_POSITION_PRECEDING
(2)
Set when
other
is
preceding
node
Node
DOCUMENT_POSITION_FOLLOWING
(4)
Set when
other
is
following
node
Node
DOCUMENT_POSITION_CONTAINS
(8)
Set when
other
is an
ancestor
of
node
Node
DOCUMENT_POSITION_CONTAINED_BY
(16, 10 in hexadecimal)
Set when
other
is a
descendant
of
node
node
contains(other)
Returns true if
other
is an
inclusive descendant
of
node
otherwise false.
These are the constants
compareDocumentPosition()
returns as mask:
DOCUMENT_POSITION_DISCONNECTED
(1);
DOCUMENT_POSITION_PRECEDING
(2);
DOCUMENT_POSITION_FOLLOWING
(4);
DOCUMENT_POSITION_CONTAINS
(8);
DOCUMENT_POSITION_CONTAINED_BY
(16, 10 in hexadecimal);
DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC
(32, 20 in hexadecimal).
The
compareDocumentPosition(
other
method
steps are:
If
this
is
other
, then return zero.
Let
node1
be
other
and
node2
be
this
Let
attr1
and
attr2
be null.
If
node1
is an
attribute
, then set
attr1
to
node1
and
node1
to
attr1
’s
element
If
node2
is an
attribute
Set
attr2
to
node2
and
node2
to
attr2
’s
element
If
attr1
and
node1
are non-null, and
node2
is
node1
For each
attr
of
node2
’s
attribute list
If
attr
equals
attr1
, then return the result of
adding
DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC
and
DOCUMENT_POSITION_PRECEDING
If
attr
equals
attr2
, then return the result of
adding
DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC
and
DOCUMENT_POSITION_FOLLOWING
If
node1
or
node2
is null, or
node1
’s
root
is
not
node2
’s
root
, then return the result of adding
DOCUMENT_POSITION_DISCONNECTED
DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC
, and
either
DOCUMENT_POSITION_PRECEDING
or
DOCUMENT_POSITION_FOLLOWING
, with the
constraint that this is to be consistent, together.
Whether to return
DOCUMENT_POSITION_PRECEDING
or
DOCUMENT_POSITION_FOLLOWING
is typically implemented via pointer comparison. In
JavaScript implementations a cached
Math
random
()
value can
be used.
If
node1
is an
ancestor
of
node2
and
attr1
is null, or
node1
is
node2
and
attr2
is non-null, then return the
result of adding
DOCUMENT_POSITION_CONTAINS
to
DOCUMENT_POSITION_PRECEDING
If
node1
is a
descendant
of
node2
and
attr2
is null, or
node1
is
node2
and
attr1
is non-null, then return the
result of adding
DOCUMENT_POSITION_CONTAINED_BY
to
DOCUMENT_POSITION_FOLLOWING
If
node1
is
preceding
node2
, then return
DOCUMENT_POSITION_PRECEDING
Due to the way
attributes
are handled in this algorithm this results in a
node
’s
attributes
counting as
preceding
that
node
’s
children
, despite
attributes
not
participating
in the same
tree
Return
DOCUMENT_POSITION_FOLLOWING
The
contains(
other
method steps are to return
true if
other
is an
inclusive descendant
of
this
; otherwise false
(including when
other
is null).
To
locate a namespace prefix
for an
element
using
namespace
, run these steps:
If
element
’s
namespace
is
namespace
and its
namespace prefix
is non-null, then return its
namespace prefix
If
element
has
an
attribute
whose
namespace prefix
is "
xmlns
" and
value
is
namespace
, then return
element
’s first such
attribute
’s
local name
If
element
’s
parent element
is non-null, then return the result of running
locate a namespace prefix
on that
element
using
namespace
Return null.
To
locate a namespace
for a
node
using
prefix
, switch on
the interface
node
implements
Element
If
prefix
is "
xml
", then return the
XML namespace
If
prefix
is "
xmlns
", then return the
XMLNS namespace
If its
namespace
is non-null and its
namespace prefix
is
prefix
, then return
namespace
If it
has
an
attribute
whose
namespace
is the
XMLNS namespace
namespace prefix
is "
xmlns
", and
local name
is
prefix
, or if
prefix
is null and it
has
an
attribute
whose
namespace
is the
XMLNS namespace
namespace prefix
is null, and
local name
is "
xmlns
", then return its
value
if it is not the empty string, and
null otherwise.
If its
parent element
is null, then return null.
Return the result of running
locate a namespace
on its
parent element
using
prefix
Document
If its
document element
is null, then return null.
Return the result of running
locate a namespace
on its
document element
using
prefix
DocumentType
DocumentFragment
Return null.
Attr
If its
element
is null, then return null.
Return the result of running
locate a namespace
on its
element
using
prefix
Otherwise
If its
parent element
is null, then return null.
Return the result of running
locate a namespace
on its
parent element
using
prefix
The
lookupPrefix(
namespace
method steps are:
If
namespace
is null or the empty string, then return null.
Switch on the interface
this
implements
Element
Return the result of
locating a namespace prefix
for
this
using
namespace
Document
If
this
’s
document element
is null, then return null.
Return the result of
locating a namespace prefix
for
this
’s
document element
using
namespace
DocumentType
DocumentFragment
Return null.
Attr
If
this
’s
element
is null, then return null.
Return the result of
locating a namespace prefix
for
this
’s
element
using
namespace
Otherwise
If
this
’s
parent element
is null, then return null.
Return the result of
locating a namespace prefix
for
this
’s
parent element
using
namespace
The
lookupNamespaceURI(
prefix
method steps
are:
If
prefix
is the empty string, then set it to null.
Return the result of running
locate a namespace
for
this
using
prefix
The
isDefaultNamespace(
namespace
method steps
are:
If
namespace
is the empty string, then set it to null.
Let
defaultNamespace
be the result of running
locate a namespace
for
this
using null.
Return true if
defaultNamespace
is the same as
namespace
; otherwise
false.
The
insertBefore(
node
child
method steps are to return the result of
pre-inserting
node
into
this
before
child
The
appendChild(
node
method steps are to
return the result of
appending
node
to
this
The
replaceChild(
node
child
method steps are to return the result of
replacing
child
with
node
within
this
The
removeChild(
child
method steps are to
return the result of
pre-removing
child
from
this
The
list of elements with qualified name
qualifiedName
for a
node
root
is the
HTMLCollection
returned by the following
algorithm:
If
qualifiedName
is U+002A (*), then return an
HTMLCollection
rooted at
root
, whose filter matches only
descendant
elements
Otherwise, if
root
’s
node document
is an
HTML document
return an
HTMLCollection
rooted at
root
, whose filter matches the following
descendant
elements
Whose
namespace
is the
HTML namespace
and whose
qualified name
is
qualifiedName
, in
ASCII lowercase
Whose
namespace
is
not
the
HTML namespace
and whose
qualified name
is
qualifiedName
Otherwise, return an
HTMLCollection
rooted at
root
, whose filter matches
descendant
elements
whose
qualified name
is
qualifiedName
When invoked with the same argument, and as long as
root
’s
node document
’s
type
has not changed, the same
HTMLCollection
object may be returned as returned by an earlier call.
The
list of elements with namespace
namespace
and local name
localName
for a
node
root
is the
HTMLCollection
returned by the following
algorithm:
If
namespace
is the empty string, then set it to null.
If both
namespace
and
localName
are U+002A (*), then return an
HTMLCollection
rooted at
root
, whose filter matches
descendant
elements
If
namespace
is U+002A (*), then return an
HTMLCollection
rooted at
root
, whose filter matches
descendant
elements
whose
local name
is
localName
If
localName
is U+002A (*), then return an
HTMLCollection
rooted at
root
, whose filter matches
descendant
elements
whose
namespace
is
namespace
Return an
HTMLCollection
rooted at
root
, whose filter matches
descendant
elements
whose
namespace
is
namespace
and
local name
is
localName
When invoked with the same arguments, the same
HTMLCollection
object may be returned as
returned by an earlier call.
The
list of elements with class names
classNames
for a
node
root
is the
HTMLCollection
returned by the following
algorithm:
Let
classes
be the result of running the
ordered set parser
on
classNames
If
classes
is the empty set, return an empty
HTMLCollection
Return an
HTMLCollection
rooted at
root
, whose filter matches
descendant
elements
that have all their
classes
in
classes
The comparisons for the
classes
must be done in an
ASCII case-insensitive
manner if
root
’s
node document
’s
mode
is "
quirks
"; otherwise in an
identical to
manner.
When invoked with the same argument, the same
HTMLCollection
object may be returned as
returned by an earlier call.
4.5.
Interface
Document
Exposed
Window
interface
Document
Node
constructor
();

SameObject
readonly
attribute
DOMImplementation
implementation
readonly
attribute
USVString
URL
readonly
attribute
USVString
documentURI
readonly
attribute
DOMString
compatMode
readonly
attribute
DOMString
characterSet
readonly
attribute
DOMString
charset
; // legacy alias of .characterSet
readonly
attribute
DOMString
inputEncoding
; // legacy alias of .characterSet
readonly
attribute
DOMString
contentType
readonly
attribute
DocumentType
doctype
readonly
attribute
Element
documentElement
HTMLCollection
getElementsByTagName
DOMString
qualifiedName
);
HTMLCollection
getElementsByTagNameNS
DOMString
namespace
DOMString
localName
);
HTMLCollection
getElementsByClassName
DOMString
classNames
);

CEReactions
NewObject
Element
createElement
DOMString
localName
optional
DOMString
or
ElementCreationOptions
options
= {});
CEReactions
NewObject
Element
createElementNS
DOMString
namespace
DOMString
qualifiedName
optional
DOMString
or
ElementCreationOptions
options
= {});
NewObject
DocumentFragment
createDocumentFragment
();
NewObject
Text
createTextNode
DOMString
data
);
NewObject
CDATASection
createCDATASection
DOMString
data
);
NewObject
Comment
createComment
DOMString
data
);
NewObject
ProcessingInstruction
createProcessingInstruction
DOMString
target
DOMString
data
);

CEReactions
NewObject
Node
importNode
Node
node
optional
boolean
or
ImportNodeOptions
options
false
);
CEReactions
Node
adoptNode
Node
node
);

NewObject
Attr
createAttribute
DOMString
localName
);
NewObject
Attr
createAttributeNS
DOMString
namespace
DOMString
qualifiedName
);

NewObject
Event
createEvent
DOMString
interface
); // legacy

NewObject
Range
createRange
();

// NodeFilter.SHOW_ALL = 0xFFFFFFFF
NewObject
NodeIterator
createNodeIterator
Node
root
optional
unsigned
long
whatToShow
= 0xFFFFFFFF,
optional
NodeFilter
filter
null
);
NewObject
TreeWalker
createTreeWalker
Node
root
optional
unsigned
long
whatToShow
= 0xFFFFFFFF,
optional
NodeFilter
filter
null
);
};

Exposed
Window
interface
XMLDocument
Document
{};
dictionary
ElementCreationOptions
CustomElementRegistry
customElementRegistry
DOMString
is
};
dictionary
ImportNodeOptions
CustomElementRegistry
customElementRegistry
boolean
selfOnly
false
};
Document
nodes
are simply
known as
documents
document
’s
node document
is itself.
Each
document
has an associated
encoding
(an
encoding
),
content type
(a string),
URL
(a
URL
),
origin
(an
origin
),
type
("
xml
" or "
html
"),
mode
("
no-quirks
", "
quirks
", or "
limited-quirks
"),
allow declarative shadow roots
(a boolean), and
custom element registry
(null or a
CustomElementRegistry
object).
[ENCODING]
[URL]
[HTML]
Unless stated otherwise, a
document
’s
encoding
is the
utf-8
encoding
content type
is
application/xml
",
URL
is "
about:blank
",
origin
is an
opaque origin
type
is "
xml
",
mode
is
no-quirks
",
allow declarative shadow roots
is false, and
custom element registry
is null.
document
is said to be an
XML document
if its
type
is "
xml
"; otherwise an
HTML document
Whether a
document
is an
HTML document
or an
XML document
affects the
behavior of certain APIs.
document
is said to be in
no-quirks mode
if its
mode
is "
no-quirks
",
quirks mode
if its
mode
is "
quirks
", and
limited-quirks mode
if its
mode
is "
limited-quirks
".
The
mode
is only ever changed from the default for
documents
created by the
HTML parser
based on the presence, absence, or value of the DOCTYPE string,
and by a new
browsing context
(initial "
about:blank
").
[HTML]
No-quirks mode
was originally known as "standards mode" and
limited-quirks mode
was once known as "almost standards mode". They have been renamed because their details are now
defined by standards. (And because Ian Hickson vetoed their original names on the basis that they
are nonsensical.)
document
’s
get the parent
algorithm, given an
event
, returns
null if
event
’s
type
attribute value is "
load
" or
document
does not have a
browsing context
; otherwise the
document
’s
relevant global object
document
= new
Document()
Returns a new
document
document
implementation
Returns
document
’s
DOMImplementation
object.
document
URL
document
documentURI
Returns
document
’s
URL
document
compatMode
Returns the string "
BackCompat
" if
document
’s
mode
is
quirks
"; otherwise "
CSS1Compat
".
document
characterSet
Returns
document
’s
encoding
document
contentType
Returns
document
’s
content type
The
new Document()
constructor
steps are to set
this
’s
origin
to the
origin
of
current global object
’s
associated
Document
[HTML]
Unlike
createDocument()
, this constructor does not
return an
XMLDocument
object, but a
document
Document
object).
The
implementation
getter steps are to return the
DOMImplementation
object that is associated with
this
The
URL
and
documentURI
getter steps are to return
this
’s
URL
serialized
The
compatMode
getter steps are to return
BackCompat
" if
this
’s
mode
is "
quirks
";
otherwise "
CSS1Compat
".
The
characterSet
charset
, and
inputEncoding
getter steps are to return
this
’s
encoding
’s
name
The
contentType
getter steps are to return
this
’s
content type
document
doctype
Returns the
doctype
or null if
there is none.
document
documentElement
Returns the
document element
collection
document
getElementsByTagName
qualifiedName
If
qualifiedName
is "
" returns an
HTMLCollection
of all
descendant
elements
Otherwise, returns an
HTMLCollection
of all
descendant
elements
whose
qualified name
is
qualifiedName
(Matches case-insensitively against
elements
in the
HTML namespace
within an
HTML document
.)
collection
document
getElementsByTagNameNS
namespace
localName
If
namespace
and
localName
are "
", returns an
HTMLCollection
of all
descendant
elements
If only
namespace
is "
", returns an
HTMLCollection
of all
descendant
elements
whose
local name
is
localName
If only
localName
is "
", returns an
HTMLCollection
of all
descendant
elements
whose
namespace
is
namespace
Otherwise, returns an
HTMLCollection
of all
descendant
elements
whose
namespace
is
namespace
and
local name
is
localName
collection
document
getElementsByClassName
classNames
collection
element
getElementsByClassName
classNames
Returns an
HTMLCollection
of the
elements
in the object on which the method
was invoked (a
document
or an
element
) that have all the classes given by
classNames
. The
classNames
argument is interpreted as a space-separated list
of classes.
The
doctype
getter steps are to return the
child
of
this
that is a
doctype
; otherwise null.
The
documentElement
getter steps are to return
this
’s
document element
The
getElementsByTagName(
qualifiedName
method steps are to return the
list of elements with qualified name
qualifiedName
for
this
Thus, in an
HTML document
document
getElementsByTagName
"FOO"
will match

elements that are not in the
HTML namespace
, and

elements that are in
the
HTML namespace
, but not

elements
that are in the
HTML namespace
The
getElementsByTagNameNS(
namespace
localName
method steps are to return the
list of elements with namespace
namespace
and local
name
localName
for
this
The
getElementsByClassName(
classNames
method steps are to return the
list of elements with class names
classNames
for
this
Given the following XHTML fragment:
div
id
"example"
id
"p1"
class
"aaa bbb"
/>
id
"p2"
class
"aaa ccc"
/>
id
"p3"
class
"bbb ccc"
/>
div
A call to
document
getElementById
"example"
).
getElementsByClassName
"aaa"
would return an
HTMLCollection
with the two paragraphs
p1
and
p2
in it.
A call to
getElementsByClassName
"ccc bbb"
would only return one node, however, namely
p3
. A call to
document
getElementById
"example"
).
getElementsByClassName
"bbb  ccc "
would return the same thing.
A call to
getElementsByClassName
"aaa,bbb"
would return no nodes; none of the elements above are in the
aaa,bbb
class.
element
document
createElement(localName [, options])
Returns an
element
with
localName
as
local name
(if
document
is an
HTML document
localName
gets lowercased). The
element
’s
namespace
is the
HTML namespace
when
document
is an
HTML document
or
document
’s
content type
is "
application/xhtml+xml
"; otherwise null.
When supplied,
options
’s
customElementRegistry
can be
used to set the
CustomElementRegistry
When supplied,
options
’s
is
can be used to create a
customized built-in element
If
localName
is not a
valid element local name
an
InvalidCharacterError
DOMException
will be thrown.
When both
options
’s
customElementRegistry
and
options
’s
is
are supplied, a
NotSupportedError
DOMException
will be thrown.
element
document
createElementNS(namespace, qualifiedName [, options])
Returns an
element
with
namespace
namespace
. Its
namespace prefix
will be everything before U+003A (:) in
qualifiedName
or null. Its
local name
will be everything after
U+003A (:) in
qualifiedName
or
qualifiedName
When supplied,
options
’s
customElementRegistry
can be
used to set the
CustomElementRegistry
When supplied,
options
’s
is
can be used to create a
customized built-in element
If
qualifiedName
is not a (possibly-prefixed)
valid element local name
an "
InvalidCharacterError
DOMException
will be
thrown.
If one of the following conditions is true a "
NamespaceError
DOMException
will be thrown:
Namespace prefix
is non-null and
namespace
is the empty string.
Namespace prefix
is "
xml
" and
namespace
is not the
XML namespace
qualifiedName
or
namespace prefix
is "
xmlns
" and
namespace
is not the
XMLNS namespace
namespace
is the
XMLNS namespace
and
neither
qualifiedName
nor
namespace prefix
is "
xmlns
".
When both
options
’s
customElementRegistry
and
options
’s
is
are supplied, a
NotSupportedError
DOMException
will be thrown.
documentFragment
document
createDocumentFragment()
Returns a
DocumentFragment
node
text
document
createTextNode(data)
Returns a
Text
node
whose
data
is
data
text
document
createCDATASection(data)
Returns a
CDATASection
node
whose
data
is
data
comment
document
createComment(data)
Returns a
Comment
node
whose
data
is
data
processingInstruction
document
createProcessingInstruction(target, data)
Returns a
ProcessingInstruction
node
whose
target
is
target
and
data
is
data
If
target
does not match the
Name
production an
InvalidCharacterError
DOMException
will be thrown.
If
data
contains "
?>
" an
InvalidCharacterError
DOMException
will be thrown.
The
element interface
for any
name
and
namespace
is
Element
, unless stated otherwise.
The HTML Standard will, e.g., define that for
html
and the
HTML namespace
, the
HTMLHtmlElement
interface is used.
[HTML]
The
createElement(
localName
options
method steps are:
If
localName
is not a
valid element local name
, then
throw
an "
InvalidCharacterError
DOMException
If
this
is an
HTML document
, then set
localName
to
localName
in
ASCII lowercase
Let
registry
and
is
be the result of
flattening element creation options
given
options
and
this
Let
namespace
be the
HTML namespace
, if
this
is an
HTML document
or
this
’s
content type
is
application/xhtml+xml
"; otherwise null.
Return the result of
creating an element
given
this
localName
namespace
, null,
is
, true, and
registry
The
internal
createElementNS
steps
, given
document
namespace
qualifiedName
, and
options
, are as follows:
Let (
namespace
prefix
localName
) be the result of
validating and extracting
namespace
and
qualifiedName
given "
element
".
Let
registry
and
is
be the result of
flattening element creation options
given
options
and
this
Return the result of
creating an element
given
document
localName
namespace
prefix
is
, true, and
registry
The
createElementNS(
namespace
qualifiedName
options
method steps are to return the result of running the
internal
createElementNS
steps
, given
this
namespace
qualifiedName
, and
options
To
flatten element creation options
, given a string or
ElementCreationOptions
dictionary
options
and a
document
document
Let
registry
be the result of
looking up a custom element registry
given
document
Let
is
be null.
If
options
is a dictionary:
If
options
["
is
"]
exists
, then set
is
to it.
If
options
["
customElementRegistry
"]
exists
If
is
is non-null, then
throw
a "
NotSupportedError
DOMException
Set
registry
to
options
["
customElementRegistry
"].
If
registry
is non-null,
registry
’s
is scoped
is false, and
registry
is not
document
’s
custom element registry
, then
throw
NotSupportedError
DOMException
Return
registry
and
is
createElement()
and
createElementNS()
’s
options
parameter is allowed to be a string for web compatibility.
The
createDocumentFragment()
method steps are to
return a new
DocumentFragment
node
whose
node document
is
this
The
createTextNode(
data
method steps are
to return a new
Text
node
whose
data
is
data
and
node document
is
this
The
createCDATASection(
data
method steps
are:
If
this
is an
HTML document
, then
throw
NotSupportedError
DOMException
If
data
contains the string "
]]>
", then
throw
an
InvalidCharacterError
DOMException
Return a new
CDATASection
node
with its
data
set
to
data
and
node document
set to
this
The
createComment(
data
method steps are
to return a new
Comment
node
whose
data
is
data
and
node document
is
this
The
createProcessingInstruction(
target
data
method steps are:
If
target
does not match the
Name
production,
then
throw
an "
InvalidCharacterError
DOMException
If
data
contains the string
?>
", then
throw
an
InvalidCharacterError
DOMException
Return a new
ProcessingInstruction
node
, with
target
set to
target
data
set to
data
, and
node document
set to
this
clone
document
importNode
node
[,
options
= false])
Returns a copy of
node
. If
options
is true or
options
is a
dictionary whose
selfOnly
is false, the copy also includes the
node
’s
descendants
options
’s
customElementRegistry
can be used to set the
CustomElementRegistry
of elements that have none.
If
node
is a
document
or a
shadow root
, throws a
NotSupportedError
DOMException
node
document
adoptNode
node
Moves
node
from another
document
and returns it.
If
node
is a
document
, throws a "
NotSupportedError
DOMException
or, if
node
is a
shadow root
, throws a
HierarchyRequestError
DOMException
The
importNode(
node
options
method steps are:
If
node
is a
document
or
shadow root
, then
throw
a "
NotSupportedError
DOMException
Let
subtree
be false.
Let
registry
be null.
If
options
is a boolean, then set
subtree
to
options
Otherwise:
Set
subtree
to the negation of
options
["
selfOnly
"].
If
options
["
customElementRegistry
"]
exists
, then set
registry
to it.
If
registry
’s
is scoped
is false and
registry
is not
this
’s
custom element registry
, then
throw
a "
NotSupportedError
DOMException
If
registry
is null, then set
registry
to the result of
looking up a custom element registry
given
this
Return the result of
cloning a node
given
node
with
document
set to
this
subtree
set to
subtree
, and
fallbackRegistry
set to
registry
Specifications
may define
adopting steps
for all or some
nodes
. The
algorithm is passed
node
and
oldDocument
, as indicated in the
adopt
algorithm.
To
adopt
node
node
into a
document
document
Let
oldDocument
be
node
’s
node document
If
node
’s
parent
is non-null, then
remove
node
If
document
is not
oldDocument
For each
inclusiveDescendant
of
node
’s
shadow-including inclusive descendants
, in
shadow-including tree order
Set
inclusiveDescendant
’s
node document
to
document
If
inclusiveDescendant
is a
shadow root
and if any of the following
are true:
inclusiveDescendant
’s
custom element registry
is null
and
inclusiveDescendant
’s
keep custom element registry null
is false; or
inclusiveDescendant
’s
custom element registry
is a global custom element registry
then set
inclusiveDescendant
’s
custom element registry
to
document
’s
effective global custom element registry
Otherwise, if
inclusiveDescendant
is an
element
Set the
node document
of each
attribute
in
inclusiveDescendant
’s
attribute list
to
document
If
inclusiveDescendant
’s
custom element registry
is null
or
inclusiveDescendant
’s
custom element registry
’s
is scoped
is false, then set
inclusiveDescendant
’s
custom element registry
to
document
’s
effective global custom element registry
For each
inclusiveDescendant
of
node
’s
shadow-including inclusive descendants
that is
custom
, in
shadow-including tree order
enqueue a custom element callback reaction
with
inclusiveDescendant
, callback name "
adoptedCallback
", and
oldDocument
document
».
For each
inclusiveDescendant
of
node
’s
shadow-including inclusive descendants
, in
shadow-including tree order
: run the
adopting steps
with
inclusiveDescendant
and
oldDocument
The
adoptNode(
node
method steps are:
If
node
is a
document
, then
throw
NotSupportedError
DOMException
If
node
is a
shadow root
, then
throw
HierarchyRequestError
DOMException
If
node
is a
DocumentFragment
node
whose
host
is non-null, then return.
Adopt
node
into
this
Return
node
Null or a
CustomElementRegistry
object
registry
is a global custom element registry
if
registry
is non-null and
registry
’s
is scoped
is false.
document
document
’s
effective global custom element registry
is:
If
document
’s
custom element registry
is a global custom element registry
, then return
document
’s
custom element registry
Return null.
The
createAttribute(
localName
method
steps are:
If
localName
is not a
valid attribute local name
, then
throw
an "
InvalidCharacterError
DOMException
If
this
is an
HTML document
, then set
localName
to
localName
in
ASCII lowercase
Return a new
attribute
whose
local name
is
localName
and
node document
is
this
The
createAttributeNS(
namespace
qualifiedName
method steps are:
Let (
namespace
prefix
localName
) be the result of
validating and extracting
namespace
and
qualifiedName
given "
attribute
".
Return a new
attribute
whose
namespace
is
namespace
namespace prefix
is
prefix
local name
is
localName
, and
node document
is
this
The
createEvent(
interface
method steps
are:
Let
constructor
be null.
If
interface
is an
ASCII case-insensitive
match for any of the strings in the
first column in the following table, then set
constructor
to the interface in the
second column on the same row as the matching string:
String
Interface
Notes
beforeunloadevent
BeforeUnloadEvent
[HTML]
compositionevent
CompositionEvent
[UIEVENTS]
customevent
CustomEvent
devicemotionevent
DeviceMotionEvent
[DEVICE-ORIENTATION]
deviceorientationevent
DeviceOrientationEvent
dragevent
DragEvent
[HTML]
event
Event
events
focusevent
FocusEvent
[UIEVENTS]
hashchangeevent
HashChangeEvent
[HTML]
htmlevents
Event
keyboardevent
KeyboardEvent
[UIEVENTS]
messageevent
MessageEvent
[HTML]
mouseevent
MouseEvent
[UIEVENTS]
mouseevents
storageevent
StorageEvent
[HTML]
svgevents
Event
textevent
TextEvent
[UIEVENTS]
touchevent
TouchEvent
[TOUCH-EVENTS]
uievent
UIEvent
[UIEVENTS]
uievents
If
constructor
is null, then
throw
a "
NotSupportedError
DOMException
If the interface indicated by
constructor
is not exposed on the
relevant global object
of
this
, then
throw
NotSupportedError
DOMException
Typically user agents disable support for touch events in some configurations, in
which case this clause would be triggered for the interface
TouchEvent
Let
event
be the result of
creating an event
given
constructor
Initialize
event
’s
type
attribute to the empty string.
Initialize
event
’s
timeStamp
attribute to the result of calling
current high resolution time
with
this
’s
relevant global object
Initialize
event
’s
isTrusted
attribute to false.
Unset
event
’s
initialized flag
Return
event
Event
constructors ought to be used instead.
The
createRange()
method steps are to return a new
live range
with (
this
, 0) as its
start
an
end
The
Range()
constructor can be used instead.
The
createNodeIterator(
root
whatToShow
filter
method steps are:
Let
iterator
be a new
NodeIterator
object.
Set
iterator
’s
root
and
iterator
’s
reference
to
root
Set
iterator
’s
pointer before reference
to true.
Set
iterator
’s
whatToShow
to
whatToShow
Set
iterator
’s
filter
to
filter
Return
iterator
The
createTreeWalker(
root
whatToShow
filter
method steps are:
Let
walker
be a new
TreeWalker
object.
Set
walker
’s
root
and
walker
’s
current
to
root
Set
walker
’s
whatToShow
to
whatToShow
Set
walker
’s
filter
to
filter
Return
walker
4.5.1.
Interface
DOMImplementation
User agents must create a
DOMImplementation
object whenever a
document
is
created and associate it with that
document
Exposed
Window
interface
DOMImplementation
NewObject
DocumentType
createDocumentType
DOMString
name
DOMString
publicId
DOMString
systemId
);
NewObject
XMLDocument
createDocument
DOMString
namespace
, [
LegacyNullToEmptyString
DOMString
qualifiedName
optional
DocumentType
doctype
null
);
NewObject
Document
createHTMLDocument
optional
DOMString
title
);
boolean
hasFeature
(); // useless; always returns true
};
doctype
document
implementation
createDocumentType(name, publicId, systemId)
Returns a
doctype
, with the given
name
publicId
, and
systemId
If
name
is not a
valid doctype name
, an "
InvalidCharacterError
DOMException
is thrown.
doc
document
implementation
createDocument(
namespace
qualifiedName
[,
doctype
= null])
Returns an
XMLDocument
, with a
document element
whose
local name
is
qualifiedName
and whose
namespace
is
namespace
(unless
qualifiedName
is the
empty string), and with
doctype
, if it is given, as its
doctype
This method throws the same exceptions as the
createElementNS()
method, when
invoked with
namespace
and
qualifiedName
doc
document
implementation
createHTMLDocument([
title
])
Returns a
document
, with a basic
tree
already constructed including a
title
element, unless the
title
argument is omitted.
The
createDocumentType(
name
publicId
systemId
method steps are:
If
name
is not a
valid doctype name
, then throw an "
InvalidCharacterError
DOMException
Return a new
doctype
, with
name
as its
name
publicId
as its
public ID
, and
systemId
as its
system ID
, and with its
node document
set to the associated
document
of
this
The
createDocument(
namespace
qualifiedName
doctype
method steps are:
Let
document
be a new
XMLDocument
Let
element
be null.
If
qualifiedName
is not the empty string, then set
element
to the
result of running the
internal
createElementNS
steps
, given
document
namespace
qualifiedName
, and an empty dictionary.
If
doctype
is non-null,
append
doctype
to
document
If
element
is non-null,
append
element
to
document
document
’s
origin
is
this
’s associated
document
’s
origin
document
’s
content type
is determined by
namespace
HTML namespace
application/xhtml+xml
SVG namespace
image/svg+xml
Any other namespace
application/xml
Return
document
The
createHTMLDocument(
title
method steps are:
Let
doc
be a new
document
that is an
HTML document
Set
doc
’s
content type
to "
text/html
".
Append
a new
doctype
, with "
html
" as its
name
and with its
node document
set to
doc
, to
doc
Append
the result of
creating an element
given
doc
html
", and the
HTML namespace
, to
doc
Append
the result of
creating an element
given
doc
head
", and the
HTML namespace
, to the
html
element created earlier.
If
title
is given:
Append
the result of
creating an element
given
doc
title
", and the
HTML namespace
, to the
head
element created earlier.
Append
a new
Text
node
, with its
data
set
to
title
(which could be the empty string) and its
node document
set
to
doc
, to the
title
element created earlier.
Append
the result of
creating an element
given
doc
body
", and the
HTML namespace
, to the
html
element created earlier.
doc
’s
origin
is
this
’s associated
document
’s
origin
Return
doc
The
hasFeature()
method steps are to
return true.
hasFeature()
originally would report whether the user agent
claimed to support a given DOM feature, but experience proved it was not nearly as
reliable or granular as simply checking whether the desired objects, attributes, or
methods existed. As such, it is no longer to be used, but continues to exist (and simply
returns true) so that old pages don’t stop working.
4.6.
Interface
DocumentType
Exposed
Window
interface
DocumentType
Node
readonly
attribute
DOMString
name
readonly
attribute
DOMString
publicId
readonly
attribute
DOMString
systemId
};
DocumentType
nodes
are simply known as
doctypes
Doctypes
have an associated
name
public ID
, and
system ID
When a
doctype
is created, its
name
is always given. Unless
explicitly given when a
doctype
is created, its
public ID
and
system ID
are the
empty string.
The
name
getter steps are to return
this
’s
name
The
publicId
getter steps are to return
this
’s
public ID
The
systemId
getter steps are to return
this
’s
system ID
4.7.
Interface
DocumentFragment
Exposed
Window
interface
DocumentFragment
Node
constructor
();
};
DocumentFragment
node
has an associated
host
(null or an
element
in a different
node tree
). It is null unless otherwise stated.
An object
is a
host-including inclusive ancestor
of an object
, if either
is an
inclusive ancestor
of
or if
’s
root
has a non-null
host
and
is a
host-including inclusive ancestor
of
’s
root
’s
host
The
DocumentFragment
node
’s
host
concept is useful for HTML’s
template
element and for
shadow roots
, and impacts the
pre-insert
and
replace
algorithms.
tree
= new
DocumentFragment()
Returns a new
DocumentFragment
node
The
new DocumentFragment()
constructor steps are to set
this
’s
node document
to
current global object
’s
associated
Document
4.8.
Interface
ShadowRoot
Exposed
Window
interface
ShadowRoot
DocumentFragment
readonly
attribute
ShadowRootMode
mode
readonly
attribute
boolean
delegatesFocus
readonly
attribute
SlotAssignmentMode
slotAssignment
readonly
attribute
boolean
clonable
readonly
attribute
boolean
serializable
readonly
attribute
Element
host
attribute
EventHandler
onslotchange
};
enum
ShadowRootMode
"open"
"closed"
};
enum
SlotAssignmentMode
"manual"
"named"
};
ShadowRoot
nodes
are simply known as
shadow roots
Shadow roots
’s associated
host
is never null.
Shadow roots
have an associated
mode
("
open
or "
closed
").
Shadow roots
have an associated
delegates focus
(a boolean). It is initially set to false.
Shadow roots
have an associated
available to element internals
(a boolean). It is initially set to
false.
Shadow roots
have an associated
declarative
(a boolean). It is initially set to false.
Shadow roots
have an associated
slot assignment
("
manual
" or "
named
").
Shadow roots
have an associated
clonable
(a boolean).
It is initially set to false.
Shadow roots
have an associated
serializable
(a boolean).
It is initially set to false.
Shadow roots
have an associated
custom element registry
(null or a
CustomElementRegistry
object). It is initially null.
Shadow roots
have an associated
keep custom element registry null
(a boolean). It is initially false.
This can only ever be true in combination with declarative shadow roots. And it only
matters for as long as the
shadow root
’s
custom element registry
is null.
shadow root
’s
get the parent
algorithm, given an
event
, returns
null if
event
’s
composed flag
is unset and
shadow root
is the
root
of
event
’s
path
’s first struct’s
invocation target
; otherwise
shadow root
’s
host
The
mode
getter steps are to return
this
’s
mode
The
delegatesFocus
getter steps are to return
this
’s
delegates focus
The
slotAssignment
getter steps are to return
this
’s
slot assignment
The
clonable
getter steps are to return
this
’s
clonable
The
serializable
getter steps are to return
this
’s
serializable
The
host
getter steps are to return
this
’s
host
The
onslotchange
attribute is an
event handler IDL attribute
for the
onslotchange
event handler
, whose
event handler event type
is
slotchange
In
shadow-including tree order
is
shadow-including preorder, depth-first traversal
of a
node tree
Shadow-including preorder, depth-first traversal
of a
node tree
tree
is preorder, depth-first traversal of
tree
, with for each
shadow host
encountered in
tree
shadow-including preorder, depth-first traversal
of that
element
’s
shadow root
’s
node tree
just after it is encountered.
The
shadow-including root
of an object is its
root
’s
host
’s
shadow-including root
, if the
object’s
root
is a
shadow root
; otherwise its
root
An object
is a
shadow-including descendant
of an object
, if
is a
descendant
of
, or
’s
root
is a
shadow root
and
’s
root
’s
host
is a
shadow-including inclusive descendant
of
shadow-including inclusive descendant
is an object or one of its
shadow-including descendants
An object
is a
shadow-including ancestor
of an object
, if and only if
is a
shadow-including descendant
of
shadow-including inclusive ancestor
is an object or one of its
shadow-including ancestors
node
is
closed-shadow-hidden
from a
node
if all of the following conditions are true:
’s
root
is a
shadow root
’s
root
is not a
shadow-including inclusive ancestor
of
’s
root
is a
shadow root
whose
mode
is "
closed
" or
’s
root
’s
host
is
closed-shadow-hidden
from
To
retarget
an object
against an object
, repeat these steps until they return an object:
If one of the following is true
is not a
node
’s
root
is not a
shadow root
is a
node
and
’s
root
is a
shadow-including inclusive ancestor
of
then return
Set
to
’s
root
’s
host
The
retargeting
algorithm is used by
event dispatch
as well
as other specifications, such as
Fullscreen
[FULLSCREEN]
4.9.
Interface
Element
Exposed
Window
interface
Element
Node
readonly
attribute
DOMString
namespaceURI
readonly
attribute
DOMString
prefix
readonly
attribute
DOMString
localName
readonly
attribute
DOMString
tagName

CEReactions
attribute
DOMString
id
CEReactions
attribute
DOMString
className
SameObject
PutForwards
value
readonly
attribute
DOMTokenList
classList
CEReactions
Unscopable
attribute
DOMString
slot
boolean
hasAttributes
();
SameObject
readonly
attribute
NamedNodeMap
attributes
sequence
DOMString
getAttributeNames
();
DOMString
getAttribute
DOMString
qualifiedName
);
DOMString
getAttributeNS
DOMString
namespace
DOMString
localName
);
CEReactions
undefined
setAttribute
DOMString
qualifiedName
, (
TrustedType
or
DOMString
value
);
CEReactions
undefined
setAttributeNS
DOMString
namespace
DOMString
qualifiedName
, (
TrustedType
or
DOMString
value
);
CEReactions
undefined
removeAttribute
DOMString
qualifiedName
);
CEReactions
undefined
removeAttributeNS
DOMString
namespace
DOMString
localName
);
CEReactions
boolean
toggleAttribute
DOMString
qualifiedName
optional
boolean
force
);
boolean
hasAttribute
DOMString
qualifiedName
);
boolean
hasAttributeNS
DOMString
namespace
DOMString
localName
);
Attr
getAttributeNode
DOMString
qualifiedName
);
Attr
getAttributeNodeNS
DOMString
namespace
DOMString
localName
);
CEReactions
Attr
setAttributeNode
Attr
attr
);
CEReactions
Attr
setAttributeNodeNS
Attr
attr
);
CEReactions
Attr
removeAttributeNode
Attr
attr
);
ShadowRoot
attachShadow
ShadowRootInit
init
);
readonly
attribute
ShadowRoot
shadowRoot
readonly
attribute
CustomElementRegistry
customElementRegistry
Element
closest
DOMString
selectors
);
boolean
matches
DOMString
selectors
);
boolean
webkitMatchesSelector
DOMString
selectors
); // legacy alias of .matches
HTMLCollection
getElementsByTagName
DOMString
qualifiedName
);
HTMLCollection
getElementsByTagNameNS
DOMString
namespace
DOMString
localName
);
HTMLCollection
getElementsByClassName
DOMString
classNames
);

CEReactions
Element
insertAdjacentElement
DOMString
where
Element
element
); // legacy
undefined
insertAdjacentText
DOMString
where
DOMString
data
); // legacy
};
dictionary
ShadowRootInit
required
ShadowRootMode
mode
boolean
delegatesFocus
false
SlotAssignmentMode
slotAssignment
= "named";
boolean
clonable
false
boolean
serializable
false
CustomElementRegistry
customElementRegistry
};
ShadowRootInit
somewhat unusually allows both
undefined
and
null
to be passed to its
customElementRegistry
member to allow web
developers to pass a
ShadowRoot
node instead of a dictionary to
attachShadow()
Element
nodes
are simply known as
elements
Elements
have an associated:
namespace
Null or a non-empty string.
namespace prefix
Null or a non-empty string.
local name
A non-empty string.
custom element registry
Null or a
CustomElementRegistry
object.
custom element state
undefined
", "
failed
", "
uncustomized
",
precustomized
", or "
custom
".
custom element definition
Null or a
custom element definition
is
value
Null or a
valid custom element name
When an
element
is
created
, all of these values are
initialized.
An
element
whose
custom element state
is
uncustomized
" or "
custom
" is said to be
defined
. An
element
whose
custom element state
is "
custom
" is said to be
custom
Whether or not an element is
defined
is used to determine the
behavior of the
:defined
pseudo-class. Whether or not an element is
custom
is
used to determine the behavior of the
mutation algorithms
. The
failed
" and "
precustomized
" states are used to ensure that if a
custom element constructor
fails to execute correctly the first time, it is not executed
again by an
upgrade
The following code illustrates elements in each of these four states:

script
window
customElements
define
"sw-rey"
class
extends
HTMLElement
{})
window
customElements
define
"sw-finn"
class
extends
HTMLElement
{},
extends
"p"
})
window
customElements
define
"sw-kylo"
class
extends
HTMLElement
constructor
()
// super() intentionally omitted for this example
})
script

sw-han
>sw-han
is
"sw-luke"
>is
"asdf"
>
sw-kylo
>sw-kylo

>asdf
>asdf

sw-rey
>sw-rey
is
"sw-finn"
>Elements
also have an associated
shadow root
(null or a
shadow root
). It is null unless otherwise stated. An
element
is a
shadow host
if its
shadow root
is non-null.
An
element
’s
qualified name
is its
local name
if its
namespace prefix
is null; otherwise its
namespace prefix
, followed by "
", followed by its
local name
An
element
’s
HTML-uppercased qualified name
is the return
value of these steps:
Let
qualifiedName
be
this
’s
qualified name
If
this
is in the
HTML namespace
and its
node document
is an
HTML document
, then set
qualifiedName
to
qualifiedName
in
ASCII uppercase
Return
qualifiedName
User agents could optimize
qualified name
and
HTML-uppercased qualified name
by storing them in internal slots.
To
create an element
, given a
document
document
, string
localName
, string-or-null
namespace
, and
optionally a string-or-null
prefix
(default null), string-or-null
is
(default
null), boolean
synchronousCustomElements
(default false), and "
default
",
null, or a
CustomElementRegistry
object
registry
(default "
default
"):
Let
result
be null.
If
registry
is "
default
", then set
registry
to the result
of
looking up a custom element registry
given
document
Let
definition
be the result of
looking up a custom element definition
given
registry
namespace
localName
, and
is
If
definition
is non-null, and
definition
’s
name
is not equal to its
local name
(i.e.,
definition
represents a
customized built-in element
):
Let
interface
be the
element interface
for
localName
and the
HTML namespace
Set
result
to the result of
creating an element internal
given
document
interface
localName
, the
HTML namespace
prefix
, "
undefined
",
is
, and
registry
If
synchronousCustomElements
is true, then run this step while catching any
exceptions:
Upgrade
result
using
definition
If this step threw an exception
exception
Report
exception
for
definition
’s
constructor
’s corresponding JavaScript object’s
associated realm
’s
global object
Set
result
’s
custom element state
to
failed
".
Otherwise,
enqueue a custom element upgrade reaction
given
result
and
definition
Otherwise, if
definition
is non-null:
If
synchronousCustomElements
is true:
Let
be
definition
’s
constructor
Set
the
surrounding agent
’s
active custom element constructor map
] to
registry
Run these steps while catching any exceptions:
Set
result
to the result of
constructing
, with no
arguments.
Assert:
result
’s
custom element state
and
custom element definition
are initialized.
Assert:
result
’s
namespace
is the
HTML namespace
IDL enforces that
result
is an
HTMLElement
object, which all
use the
HTML namespace
If
result
’s
attribute list
is not empty
then
throw
a "
NotSupportedError
DOMException
If
result
has
children
, then
throw
NotSupportedError
DOMException
If
result
’s
parent
is non-null, then
throw
NotSupportedError
DOMException
If
result
’s
node document
is not
document
, then
throw
a "
NotSupportedError
DOMException
If
result
’s
local name
is not equal to
localName
, then
throw
a "
NotSupportedError
DOMException
Set
result
’s
namespace prefix
to
prefix
Set
result
’s
is
value
to null.
Set
result
’s
custom element registry
to
registry
If any of these steps threw an exception
exception
Report
exception
for
definition
’s
constructor
’s corresponding
JavaScript object’s
associated realm
’s
global object
Set
result
to the result of
creating an element internal
given
document
HTMLUnknownElement
localName
, the
HTML namespace
prefix
, "
failed
", null, and
registry
Remove
the
surrounding agent
’s
active custom element constructor map
].
Under normal circumstances it will already have been removed at this point.
Otherwise:
Set
result
to the result of
creating an element internal
given
document
HTMLElement
localName
, the
HTML namespace
prefix
, "
undefined
", null, and
registry
Enqueue a custom element upgrade reaction
given
result
and
definition
Otherwise:
Let
interface
be the
element interface
for
localName
and
namespace
Set
result
to the result of
creating an element internal
given
document
interface
localName
namespace
prefix
, "
uncustomized
",
is
, and
registry
If
namespace
is the
HTML namespace
, and either
localName
is a
valid custom element name
or
is
is non-null, then set
result
’s
custom element state
to "
undefined
".
Return
result
To
create an element internal
given a
document
document
, an
interface
interface
a string
localName
, a string-or-null
namespace
a string-or-null
prefix
, a string
state
, a string-or-null
is
, and
null or a
CustomElementRegistry
object
registry
Let
element
be a new
element
that implements
interface
with
namespace
set to
namespace
namespace prefix
set to
prefix
local name
set to
localName
custom element registry
set to
registry
custom element state
set to
state
custom element definition
set to null,
is
value
set to
is
, and
node document
set to
document
Assert
element
’s
attribute list
is empty
Return
element
Elements
also have an
attribute list
, which is a
list
exposed through a
NamedNodeMap
. Unless explicitly given when an
element
is created, its
attribute list
is empty
An
element
has
an
attribute
if its
attribute list
contains
This and
other specifications
may define
attribute change steps
for
elements
. The algorithm is passed
element
localName
oldValue
value
, and
namespace
To
handle attribute changes
for an
attribute
attribute
with
element
oldValue
, and
newValue
, run these steps:
Queue a mutation record
of "
attributes
" for
element
with
attribute
’s
local name
attribute
’s
namespace
oldValue
, « », « », null, and null.
If
element
is
custom
, then
enqueue a custom element callback reaction
with
element
, callback name
attributeChangedCallback
", and «
attribute
’s
local name
oldValue
newValue
attribute
’s
namespace
».
Run the
attribute change steps
with
element
attribute
’s
local name
oldValue
newValue
, and
attribute
’s
namespace
To
change
an
attribute
attribute
to
value
, run these steps:
Let
oldValue
be
attribute
’s
value
Set
attribute
’s
value
to
value
Handle attribute changes
for
attribute
with
attribute
’s
element
oldValue
, and
value
To
append
an
attribute
attribute
to an
element
element
, run these
steps:
Append
attribute
to
element
’s
attribute list
Set
attribute
’s
element
to
element
Set
attribute
’s
node document
to
element
’s
node document
Handle attribute changes
for
attribute
with
element
, null, and
attribute
’s
value
To
remove
an
attribute
attribute
, run these steps:
Let
element
be
attribute
’s
element
Remove
attribute
from
element
’s
attribute
list
Set
attribute
’s
element
to null.
Handle attribute changes
for
attribute
with
element
attribute
’s
value
, and null.
To
replace
an
attribute
oldAttribute
with an
attribute
newAttribute
Let
element
be
oldAttribute
’s
element
Replace
oldAttribute
by
newAttribute
in
element
’s
attribute list
Set
newAttribute
’s
element
to
element
Set
newAttribute
’s
node document
to
element
’s
node document
Set
oldAttribute
’s
element
to null.
Handle attribute changes
for
oldAttribute
with
element
oldAttribute
’s
value
, and
newAttribute
’s
value
To
get an attribute by name
given a
string
qualifiedName
and an
element
element
If
element
is in the
HTML namespace
and its
node document
is an
HTML document
, then set
qualifiedName
to
qualifiedName
in
ASCII lowercase
Return the first
attribute
in
element
’s
attribute list
whose
qualified name
is
qualifiedName
; otherwise null.
To
get an attribute by namespace and local name
given null or a string
namespace
, a string
localName
, and an
element
element
If
namespace
is the empty string, then set it to null.
Return the
attribute
in
element
’s
attribute list
whose
namespace
is
namespace
and
local name
is
localName
, if any; otherwise null.
To
get an attribute value
given an
element
element
, a string
localName
, and an optional null or
string
namespace
(default null):
Let
attr
be the result of
getting an attribute
given
namespace
localName
, and
element
If
attr
is null, then return the empty string.
Return
attr
’s
value
To
set an attribute
given an
attribute
attr
and an
element
element
Let
verifiedValue
be the result of calling
get trusted type compliant attribute value
with
attr
’s
local name
attr
’s
namespace
element
, and
attr
’s
value
[TRUSTED-TYPES]
If
attr
’s
element
is neither null nor
element
throw
an "
InUseAttributeError
DOMException
Let
oldAttr
be the result of
getting an attribute
given
attr
’s
namespace
attr
’s
local name
, and
element
If
oldAttr
is
attr
, return
attr
Set
attr
’s
value
to
verifiedValue
If
oldAttr
is non-null, then
replace
oldAttr
with
attr
Otherwise,
append
attr
to
element
Return
oldAttr
To
set an attribute value
given an
element
element
, a string
localName
, a string
value
an optional null or string
prefix
(default null), and an optional null or string
namespace
(default null):
Let
attribute
be the result of
getting an attribute
given
namespace
localName
, and
element
If
attribute
is null, create an
attribute
whose
namespace
is
namespace
namespace prefix
is
prefix
local name
is
localName
value
is
value
, and
node document
is
element
’s
node document
, then
append
this
attribute
to
element
, and then
return.
Change
attribute
to
value
To
remove an attribute by name
given a string
qualifiedName
and an
element
element
Let
attr
be the result of
getting an attribute
given
qualifiedName
and
element
If
attr
is non-null, then
remove
attr
Return
attr
To
remove an attribute by namespace and local name
given null or a string
namespace
, a string
localName
, and an
element
element
Let
attr
be the result of
getting an attribute
given
namespace
localName
, and
element
If
attr
is non-null, then
remove
attr
Return
attr
An
element
can have an associated
unique identifier (ID)
Historically
elements
could have multiple identifiers e.g., by using
the HTML
id
attribute
and a DTD. This specification makes
ID
a concept of the DOM and allows for only one per
element
, given by an
id
attribute
Use these
attribute change steps
to update an
element
’s
ID
If
localName
is
id
namespace
is null, and
value
is null or the empty string, then unset
element
’s
ID
Otherwise, if
localName
is
id
namespace
is null, then
set
element
’s
ID
to
value
While this specification defines requirements for
class
id
, and
slot
attributes
on any
element
, it makes no
claims as to whether using them is conforming or not.
node
’s
parent
of type
Element
is known as its
parent element
. If the
node
has a
parent
of a different type, its
parent element
is null.
namespace
element
namespaceURI
Returns the
namespace
prefix
element
prefix
Returns the
namespace prefix
localName
element
localName
Returns the
local name
qualifiedName
element
tagName
Returns the
HTML-uppercased qualified name
The
namespaceURI
getter steps are to return
this
’s
namespace
The
prefix
getter steps are to return
this
’s
namespace prefix
The
localName
getter steps are to return
this
’s
local name
The
tagName
getter steps are to return
this
’s
HTML-uppercased qualified name
element
id
[ =
value
Returns the value of
element
’s
id
content attribute. Can be set to
change it.
element
className
[ =
value
Returns the value of
element
’s
class
content attribute. Can be set
to change it.
element
classList
Allows for manipulation of
element
’s
class
content attribute as a
set of whitespace-separated tokens through a
DOMTokenList
object.
element
slot
[ =
value
Returns the value of
element
’s
slot
content attribute. Can be set to
change it.
IDL attributes that are defined to
reflect
a string
name
, must have these getter and setter steps:
getter steps
Return the result of running
get an attribute value
given
this
and
name
setter steps
Set an attribute value
for
this
using
name
and the given value.
The
id
attribute must
reflect
id
".
The
className
attribute must
reflect
class
".
The
classList
getter steps are to return a
DOMTokenList
object whose associated
element
is
this
and whose associated
attribute
’s
local name
is
class
. The
token set
of this
particular
DOMTokenList
object are also known as the
element
’s
classes
The
slot
attribute must
reflect
slot
".
id
class
, and
slot
are effectively
superglobal attributes as they can appear on any element, regardless of that element’s
namespace.
element
hasAttributes
()
Returns true if
element
has attributes; otherwise false.
element
getAttributeNames
()
Returns the
qualified names
of all
element
’s
attributes
Can contain duplicates.
element
getAttribute
qualifiedName
Returns
element
’s first
attribute
whose
qualified name
is
qualifiedName
, and null if there is no such
attribute
otherwise.
element
getAttributeNS
namespace
localName
Returns
element
’s
attribute
whose
namespace
is
namespace
and
local name
is
localName
, and null if there is
no such
attribute
otherwise.
element
setAttribute
qualifiedName
value
Sets the
value
of
element
’s first
attribute
whose
qualified name
is
qualifiedName
to
value
element
setAttributeNS
namespace
localName
value
Sets the
value
of
element
’s
attribute
whose
namespace
is
namespace
and
local name
is
localName
to
value
element
removeAttribute
qualifiedName
Removes
element
’s first
attribute
whose
qualified name
is
qualifiedName
element
removeAttributeNS
namespace
localName
Removes
element
’s
attribute
whose
namespace
is
namespace
and
local name
is
localName
element
toggleAttribute
qualifiedName
[,
force
])
If
force
is not given, "toggles"
qualifiedName
, removing it if it is
present and adding it if it is not present. If
force
is true, adds
qualifiedName
. If
force
is false, removes
qualifiedName
Returns true if
qualifiedName
is now present; otherwise false.
element
hasAttribute
qualifiedName
Returns true if
element
has an
attribute
whose
qualified name
is
qualifiedName
; otherwise false.
element
hasAttributeNS
namespace
localName
Returns true if
element
has an
attribute
whose
namespace
is
namespace
and
local name
is
localName
The
hasAttributes()
method steps are to return false
if
this
’s
attribute list
is empty
; otherwise true.
The
attributes
getter steps are to return the
associated
NamedNodeMap
The
getAttributeNames()
method steps are to return the
qualified names
of the
attributes
in
this
’s
attribute list
, in order; otherwise a new
list
These are not guaranteed to be unique.
The
getAttribute(
qualifiedName
method
steps are:
Let
attr
be the result of
getting an attribute
given
qualifiedName
and
this
If
attr
is null, return null.
Return
attr
’s
value
The
getAttributeNS(
namespace
localName
method steps are:
Let
attr
be the result of
getting an attribute
given
namespace
localName
, and
this
If
attr
is null, return null.
Return
attr
’s
value
The
setAttribute(
qualifiedName
value
method steps are:
If
qualifiedName
is not a
valid attribute local name
, then
throw
an
InvalidCharacterError
DOMException
Despite the parameter naming,
qualifiedName
is only used as a
qualified name
if an
attribute
already
exists with that qualified name. Otherwise, it is used as the
local name
of the new
attribute. We only need to validate it for the latter case.
If
this
is in the
HTML namespace
and its
node document
is an
HTML document
, then set
qualifiedName
to
qualifiedName
in
ASCII lowercase
Let
verifiedValue
be the result of calling
get trusted type compliant attribute value
with
qualifiedName
, null,
this
and
value
[TRUSTED-TYPES]
Let
attribute
be the first
attribute
in
this
’s
attribute list
whose
qualified name
is
qualifiedName
and null otherwise.
If
attribute
is non-null, then
change
attribute
to
verifiedValue
and return.
Set
attribute
to a new
attribute
whose
local name
is
qualifiedName
value
is
verifiedValue
, and
node document
is
this
’s
node document
Append
attribute
to
this
The
setAttributeNS(
namespace
qualifiedName
value
method steps are:
Let (
namespace
prefix
localName
) be the result of
validating and extracting
namespace
and
qualifiedName
given "
attribute
".
Let
verifiedValue
be the result of calling
get trusted type compliant attribute value
with
localName
namespace
this
, and
value
[TRUSTED-TYPES]
Set an attribute value
for
this
using
localName
verifiedValue
prefix
, and
namespace
The
removeAttribute(
qualifiedName
method steps are to
remove an attribute
given
qualifiedName
and
this
, and then return undefined.
The
removeAttributeNS(
namespace
localName
method steps are to
remove an attribute
given
namespace
localName
, and
this
, and then return undefined.
The
hasAttribute(
qualifiedName
method
steps are:
If
this
is in the
HTML namespace
and its
node document
is an
HTML document
, then set
qualifiedName
to
qualifiedName
in
ASCII lowercase
Return true if
this
has
an
attribute
whose
qualified name
is
qualifiedName
; otherwise false.
The
toggleAttribute(
qualifiedName
force
method steps are:
If
qualifiedName
is not a
valid attribute local name
, then
throw
an
InvalidCharacterError
DOMException
See
the discussion above
about why
we validate it as a local name, instead of a qualified name.
If
this
is in the
HTML namespace
and its
node document
is an
HTML document
, then set
qualifiedName
to
qualifiedName
in
ASCII lowercase
Let
attribute
be the first
attribute
in
this
’s
attribute list
whose
qualified name
is
qualifiedName
and null otherwise.
If
attribute
is null:
If
force
is not given or is true, create an
attribute
whose
local name
is
qualifiedName
value
is the empty
string, and
node document
is
this
’s
node document
, then
append
this
attribute
to
this
, and then return
true.
Return false.
Otherwise, if
force
is not given or is false,
remove an attribute
given
qualifiedName
and
this
, and then return false.
Return true.
The
hasAttributeNS(
namespace
localName
method steps are:
If
namespace
is the empty string, then set it to null.
Return true if
this
has
an
attribute
whose
namespace
is
namespace
and
local name
is
localName
; otherwise false.
The
getAttributeNode(
qualifiedName
method
steps are to return the result of
getting an attribute
given
qualifiedName
and
this
The
getAttributeNodeNS(
namespace
localName
method steps are to return the result of
getting an attribute
given
namespace
localName
, and
this
The
setAttributeNode(
attr
and
setAttributeNodeNS(
attr
methods steps are to
return the result of
setting an attribute
given
attr
and
this
The
removeAttributeNode(
attr
method steps
are:
If
this
’s
attribute list
does not
contain
attr
, then
throw
a "
NotFoundError
DOMException
Remove
attr
Return
attr
shadow
element
attachShadow(init)
Creates a
shadow root
for
element
and returns it.
shadow
element
shadowRoot
Returns
element
’s
shadow root
, if any, and if
shadow root
’s
mode
is "
open
"; otherwise null.
valid shadow host name
is:
valid custom element name
article
",
aside
",
blockquote
",
body
",
div
",
footer
",
h1
",
h2
",
h3
",
h4
",
h5
",
h6
",
header
",
main
",
nav
",
",
section
", or
span
The
attachShadow(
init
method steps are:
Let
registry
be
this
’s
node document
’s
custom element registry
If
init
["
customElementRegistry
"]
exists
, then
set
registry
to it.
If
registry
is non-null,
registry
’s
is scoped
is false, and
registry
is not
this
’s
node document
’s
custom element registry
, then
throw
NotSupportedError
DOMException
Run
attach a shadow root
with
this
init
["
mode
"],
init
["
clonable
"],
init
["
serializable
"],
init
["
delegatesFocus
"],
init
["
slotAssignment
"], and
registry
Return
this
’s
shadow root
To
attach a shadow root
, given an
element
element
, a string
mode
, a boolean
clonable
a boolean
serializable
, a boolean
delegatesFocus
, a string
slotAssignment
, and null or a
CustomElementRegistry
object
registry
If
element
’s
namespace
is not the
HTML namespace
then
throw
a "
NotSupportedError
DOMException
If
element
’s
local name
is not a
valid shadow host name
, then
throw
a "
NotSupportedError
DOMException
If
element
’s
local name
is a
valid custom element name
, or
element
’s
is
value
is non-null:
Let
definition
be the result of
looking up a custom element definition
given
element
’s
custom element registry
, its
namespace
, its
local name
, and its
is
value
If
definition
is non-null and
definition
’s
disable shadow
is true, then
throw
NotSupportedError
DOMException
If
element
is a
shadow host
Let
currentShadowRoot
be
element
’s
shadow root
If any of the following are true:
currentShadowRoot
’s
declarative
is false; or
currentShadowRoot
’s
mode
is not
mode
then
throw
a "
NotSupportedError
DOMException
Otherwise:
Remove
all of
currentShadowRoot
’s
children
, in
tree order
Set
currentShadowRoot
’s
declarative
to false.
Return.
Let
shadow
be a new
shadow root
whose
node document
is
element
’s
node document
host
is
element
, and
mode
is
mode
Set
shadow
’s
delegates focus
to
delegatesFocus
If
element
’s
custom element state
is
precustomized
" or "
custom
", then set
shadow
’s
available to element internals
to true.
Set
shadow
’s
slot assignment
to
slotAssignment
Set
shadow
’s
declarative
to false.
Set
shadow
’s
clonable
to
clonable
Set
shadow
’s
serializable
to
serializable
Set
shadow
’s
custom element registry
to
registry
Set
element
’s
shadow root
to
shadow
The
shadowRoot
getter steps are:
Let
shadow
be
this
’s
shadow root
If
shadow
is null or its
mode
is "
closed
",
then return null.
Return
shadow
registry
element
customElementRegistry
Returns
element
’s
CustomElementRegistry
object, if any; otherwise null.
The
customElementRegistry
getter steps are to
return
this
’s
custom element registry
element
closest(selectors)
Returns the first (starting at
element
inclusive ancestor
that matches
selectors
, and null otherwise.
element
matches(selectors)
Returns true if matching
selectors
against
element
’s
root
yields
element
; otherwise false.
The
closest(
selectors
method steps are:
Let
selector
be the result of
parse a selector
from
selectors
[SELECTORS4]
If
selector
is failure, then
throw
a "
SyntaxError
DOMException
Let
elements
be
this
’s
inclusive ancestors
that are
elements
, in reverse
tree order
For each
element
of
elements
: if
match a selector against an element
, using
selector
element
, and
scoping root
this
, returns success, return
element
[SELECTORS4]
Return null.
The
matches(
selectors
and
webkitMatchesSelector(
selectors
method steps
are:
Let
selector
be the result of
parse a selector
from
selectors
[SELECTORS4]
If
selector
is failure, then
throw
a "
SyntaxError
DOMException
If the result of
match a selector against an element
, using
selector
this
, and
scoping root
this
, returns success, then return true; otherwise,
return false.
[SELECTORS4]
The
getElementsByTagName(
qualifiedName
method steps are to return the
list of elements with qualified name
qualifiedName
for
this
The
getElementsByTagNameNS(
namespace
localName
method steps are to return the
list of elements with namespace
namespace
and local
name
localName
for
this
The
getElementsByClassName(
classNames
method steps are to return the
list of elements with class names
classNames
for
this
To
insert adjacent
, given an
element
element
, string
where
, and a
node
node
, run the steps associated with the first
ASCII case-insensitive
match for
where
beforebegin
If
element
’s
parent
is null, return null.
Return the result of
pre-inserting
node
into
element
’s
parent
before
element
afterbegin
Return the result of
pre-inserting
node
into
element
before
element
’s
first child
beforeend
Return the result of
pre-inserting
node
into
element
before
null.
afterend
If
element
’s
parent
is null, return null.
Return the result of
pre-inserting
node
into
element
’s
parent
before
element
’s
next sibling
Otherwise
Throw
a "
SyntaxError
DOMException
The
insertAdjacentElement(
where
element
method steps are to return the result of running
insert adjacent
, give
this
where
, and
element
The
insertAdjacentText(
where
data
method steps are:
Let
text
be a new
Text
node
whose
data
is
data
and
node document
is
this
’s
node document
Run
insert adjacent
, given
this
where
, and
text
This method returns nothing because it existed before we had a chance to design it.
4.9.1.
Interface
NamedNodeMap
Exposed
Window
LegacyUnenumerableNamedProperties
interface
NamedNodeMap
readonly
attribute
unsigned
long
length
getter
Attr
item
unsigned
long
index
);
getter
Attr
getNamedItem
DOMString
qualifiedName
);
Attr
getNamedItemNS
DOMString
namespace
DOMString
localName
);
CEReactions
Attr
setNamedItem
Attr
attr
);
CEReactions
Attr
setNamedItemNS
Attr
attr
);
CEReactions
Attr
removeNamedItem
DOMString
qualifiedName
);
CEReactions
Attr
removeNamedItemNS
DOMString
namespace
DOMString
localName
);
};
NamedNodeMap
has an associated
element
(an
element
).
NamedNodeMap
object’s
attribute list
is its
element
’s
attribute list
NamedNodeMap
object’s
supported property indices
are the numbers in the
range zero to its
attribute list
’s
size
− 1, unless
the
attribute list
is empty
, in which case there are no
supported property indices
The
length
getter steps are to return
the
attribute list
’s
size
The
item(
index
method steps are:
If
index
is equal to or greater than
this
’s
attribute list
’s
size
, then return null.
Otherwise, return
this
’s
attribute list
index
].
NamedNodeMap
object’s
supported property names
are the return value of running these
steps:
Let
names
be the
qualified names
of the
attributes
in this
NamedNodeMap
object’s
attribute list
, with duplicates omitted, in
order.
If this
NamedNodeMap
object’s
element
is in the
HTML namespace
and its
node document
is an
HTML document
, then
for each
name
of
names
Let
lowercaseName
be
name
, in
ASCII lowercase
If
lowercaseName
is not equal to
name
, remove
name
from
names
Return
names
The
getNamedItem(
qualifiedName
method steps are to return the result of
getting an attribute
given
qualifiedName
and
element
The
getNamedItemNS(
namespace
localName
method steps are to return the result of
getting an attribute
given
namespace
localName
, and
element
The
setNamedItem(
attr
and
setNamedItemNS(
attr
method steps are
to return the result of
setting an attribute
given
attr
and
element
The
removeNamedItem(
qualifiedName
method steps are:
Let
attr
be the result of
removing an attribute
given
qualifiedName
and
element
If
attr
is null, then
throw
a "
NotFoundError
DOMException
Return
attr
The
removeNamedItemNS(
namespace
localName
method steps are:
Let
attr
be the result of
removing an attribute
given
namespace
localName
, and
element
If
attr
is null, then
throw
a "
NotFoundError
DOMException
Return
attr
4.9.2.
Interface
Attr
Exposed
Window
interface
Attr
Node
readonly
attribute
DOMString
namespaceURI
readonly
attribute
DOMString
prefix
readonly
attribute
DOMString
localName
readonly
attribute
DOMString
name
CEReactions
attribute
DOMString
value
readonly
attribute
Element
ownerElement
readonly
attribute
boolean
specified
; // useless; always returns true
};
Attr
nodes
are simply known as
attributes
. They are sometimes referred
to as
content attributes
to avoid confusion with IDL attributes.
Attributes
have a
namespace
(null or a non-empty string),
namespace prefix
(null or a non-empty string),
local name
(a non-empty string),
value
(a string), and
element
(null or an
element
).
If designed today they would just have a name and value. ☹
An
attribute
’s
qualified name
is its
local name
if its
namespace prefix
is null, and its
namespace prefix
, followed by "
", followed by its
local name
, otherwise.
User agents could have this as an internal slot as an optimization.
When an
attribute
is created, its
local name
is given. Unless explicitly
given when an
attribute
is created, its
namespace
namespace prefix
, and
element
are set to null, and its
value
is set to the empty string.
An
attribute
is an
attribute
whose
local name
is
and whose
namespace
and
namespace prefix
are
null.
The
namespaceURI
getter steps are to return
this
’s
namespace
The
prefix
getter steps are to return
this
’s
namespace prefix
The
localName
getter steps are to return
this
’s
local name
The
name
getter steps are to return
this
’s
qualified name
The
value
getter steps are to return
this
’s
value
To
set an existing attribute value
, given an
attribute
attribute
and
string
value
, run these steps:
If
attribute
’s
element
is null, then set
attribute
’s
value
to
value
and return.
Let
element
be
attribute
’s
element
Let
verifiedValue
be the result of calling
get trusted type compliant attribute value
with
attribute
’s
local name
attribute
’s
namespace
element
and
value
[TRUSTED-TYPES]
If
attribute
’s
element
is null, then set
attribute
’s
value
to
verifiedValue
and return.
Change
attribute
to
verifiedValue
The
value
setter steps are to
set an existing attribute value
with
this
and the given value.
The
ownerElement
getter steps are to return
this
’s
element
The
specified
getter steps are to return true.
4.10.
Interface
CharacterData
Exposed
Window
interface
CharacterData
Node
attribute
LegacyNullToEmptyString
DOMString
data
readonly
attribute
unsigned
long
length
DOMString
substringData
unsigned
long
offset
unsigned
long
count
);
undefined
appendData
DOMString
data
);
undefined
insertData
unsigned
long
offset
DOMString
data
);
undefined
deleteData
unsigned
long
offset
unsigned
long
count
);
undefined
replaceData
unsigned
long
offset
unsigned
long
count
DOMString
data
);
};
CharacterData
is an abstract interface. You cannot get a direct instance of it. It
is used by
Text
ProcessingInstruction
, and
Comment
nodes
Each
node
inheriting from the
CharacterData
interface has an associated mutable
string called
data
To
replace data
of a
node
node
with an integer
offset
, integer
count
, and string
data
Let
length
be
node
’s
length
If
offset
is greater than
length
, then
throw
an
IndexSizeError
DOMException
If
offset
count
is greater than
length
, then set
count
to
length
offset
Queue a mutation record
of "
characterData
" for
node
with
null, null,
node
’s
data
, « », « », null, and null.
Insert
data
into
node
’s
data
after
offset
code units
Let
deleteOffset
be
offset
data
’s
length
Starting from
deleteOffset
code units
, remove
count
code units
from
node
’s
data
For each
live range
whose
start node
is
node
and
start offset
is greater than
offset
but less than or equal to
offset
count
: set its
start offset
to
offset
For each
live range
whose
end node
is
node
and
end offset
is greater than
offset
but less than or equal to
offset
count
: set its
end offset
to
offset
For each
live range
whose
start node
is
node
and
start offset
is greater than
offset
count
: increase its
start offset
by
data
’s
length
and decrease it by
count
For each
live range
whose
end node
is
node
and
end offset
is greater than
offset
count
: increase its
end offset
by
data
’s
length
and decrease it by
count
If
node
’s
parent
is non-null, then run the
children changed steps
for
node
’s
parent
To
substring data
of a
node
node
with an integer
offset
and integer
count
Let
length
be
node
’s
length
If
offset
is greater than
length
, then
throw
an
IndexSizeError
DOMException
If
offset
count
is greater than
length
, then return a
string whose value is the
code units
from the
offset
th
code unit
to the end of
node
’s
data
Return a string whose value is the
code units
from the
offset
th
code unit
to the
offset
count
th
code unit
in
node
’s
data
The
data
getter steps are to return
this
’s
data
. Its setter steps are to
replace data
of
this
with 0,
this
’s
length
, and the given value.
The
length
getter steps are to return
this
’s
length
The
substringData(
offset
count
method steps are to return the result of
substringing data
of
this
with
offset
and
count
The
appendData(
data
method steps are
to
replace data
of
this
with
this
’s
length
, 0, and
data
The
insertData(
offset
data
method steps are to
replace data
of
this
with
offset
, 0, and
data
The
deleteData(
offset
count
method steps are to
replace data
of
this
with
offset
count
, and
the empty string.
The
replaceData(
offset
count
data
method steps are to
replace data
of
this
with
offset
count
, and
data
4.11.
Interface
Text
Exposed
Window
interface
Text
CharacterData
constructor
optional
DOMString
data
= "");

NewObject
Text
splitText
unsigned
long
offset
);
readonly
attribute
DOMString
wholeText
};
text
= new
Text([
data
= ""])
Returns a new
Text
node
whose
data
is
data
text
splitText(offset)
Splits
data
at the given
offset
and returns the remainder as
Text
node
text
wholeText
Returns the combined
data
of all direct
Text
node
siblings
An
exclusive
Text
node
is a
Text
node
that is not a
CDATASection
node
The
contiguous
Text
nodes
of a
node
node
are
node
node
’s
previous sibling
Text
node
, if any, and
its
contiguous
Text
nodes
, and
node
’s
next sibling
Text
node
, if any, and its
contiguous
Text
nodes
, avoiding any
duplicates.
The
contiguous exclusive
Text
nodes
of a
node
node
are
node
node
’s
previous sibling
exclusive
Text
node
, if any, and its
contiguous exclusive
Text
nodes
, and
node
’s
next sibling
exclusive
Text
node
, if any, and its
contiguous exclusive
Text
nodes
, avoiding any duplicates.
The
child text content
of a
node
node
is the
concatenation
of the
data
of all
the
Text
node
children
of
node
, in
tree order
The
descendant text content
of a
node
node
is the
concatenation
of the
data
of all the
Text
node
descendants
of
node
, in
tree order
The
new Text(
data
constructor steps are to set
this
’s
data
to
data
and
this
’s
node document
to
current global object
’s
associated
Document
To
split
Text
node
node
with integer
offset
Let
length
be
node
’s
length
If
offset
is greater than
length
, then
throw
an
IndexSizeError
DOMException
Let
count
be
length
offset
Let
newData
be the result of
substringing data
of
node
with
offset
and
count
Let
newNode
be a new
Text
node
whose
node document
is
node
’s
node document
and
data
is
newData
Let
parent
be
node
’s
parent
If
parent
is non-null:
Insert
newNode
into
parent
before
node
’s
next sibling
For each
live range
whose
start node
is
node
and
start offset
is greater than
offset
, set its
start node
to
newNode
and decrease its
start offset
by
offset
For each
live range
whose
end node
is
node
and
end offset
is greater than
offset
, set its
end node
to
newNode
and decrease its
end offset
by
offset
For each
live range
whose
start node
is
parent
and
start offset
is equal to the
index
of
node
plus 1,
increase its
start offset
by 1.
For each
live range
whose
end node
is
parent
and
end offset
is equal to the
index
of
node
plus 1,
increase its
end offset
by 1.
Replace data
of
node
with
offset
count
, and
the empty string.
Return
newNode
The
splitText(
offset
method steps are to
split
this
with offset
offset
The
wholeText
getter steps are to return the
concatenation
of the
data
of the
contiguous
Text
nodes
of
this
, in
tree order
4.12.
Interface
CDATASection
Exposed
Window
interface
CDATASection
Text
};
4.13.
Interface
ProcessingInstruction
Exposed
Window
interface
ProcessingInstruction
CharacterData
readonly
attribute
DOMString
target
};
ProcessingInstruction
nodes
have an associated
target
The
target
getter steps are to return
this
’s
target
4.14.
Interface
Comment
Exposed
Window
interface
Comment
CharacterData
constructor
optional
DOMString
data
= "");
};
comment
= new
Comment([
data
= ""])
Returns a new
Comment
node
whose
data
is
data
The
new Comment(
data
constructor steps are to set
this
’s
data
to
data
and
this
’s
node document
to
current global object
’s
associated
Document
5.
Ranges
5.1.
Introduction to "DOM Ranges"
StaticRange
and
Range
objects (
ranges
) represent a sequence of content within a
node tree
. Each
range
has a
start
and an
end
which
are
boundary points
. A
boundary point
is a
tuple
consisting of a
node
and an
offset
. So in other words, a
range
represents a piece of content within a
node tree
between two
boundary points
Ranges
are frequently used in editing for selecting and copying content.
Element
Element
img
src
"insanity-wolf"
alt
"Little-endian BOM; decode as big-endian!"
Text
CSS 2.1 syndata is
Element
em
Text
awesome
Text
In the
node tree
above, a
range
can be used to represent the sequence
“syndata is awes”. Assuming
is assigned to the
element
, and
em
to the
em
element
, this would be done as follows:
var
range
new
Range
(),
firstText
childNodes
],
secondText
em
firstChild
range
setStart
firstText
// do not forget the leading space
range
setEnd
secondText
// range now stringifies to the aforementioned quote
Attributes
such as
src
and
alt
in the
node tree
above cannot be represented by a
range
Ranges
are only useful for
nodes
Range
objects, unlike
StaticRange
objects, are affected by mutations to the
node tree
. Therefore they are also known as
live ranges
. Such mutations will not
invalidate them and will try to ensure that it still represents the same piece of content.
Necessarily, a
live range
might itself be modified as part of the mutation to the
node tree
when, e.g., part of the content it represents is mutated.
See the
insert
and
remove
algorithms, the
normalize()
method, and the
replace data
and
split
algorithms for details.
Updating
live ranges
in response to
node tree
mutations can be expensive. For every
node tree
change, all affected
Range
objects need to be updated. Even if the application
is uninterested in some
live ranges
, it still has to pay the cost of keeping them up-to-date
when a mutation occurs.
StaticRange
object is a lightweight
range
that does not update when the
node tree
mutates. It is therefore not subject to the same maintenance cost as
live ranges
5.2.
Boundary points
boundary point
is a
tuple
consisting of a
node
(a
node
) and an
offset
(a non-negative integer).
A correct
boundary point
’s
offset
will
be between 0 and the
boundary point
’s
node
’s
length
, inclusive.
The
position
of a
boundary point
nodeA
offsetA
) relative to a
boundary point
nodeB
offsetB
) is
before
equal
, or
after
, as returned by these steps:
Assert:
nodeA
and
nodeB
have the same
root
If
nodeA
is
nodeB
, then return
equal
if
offsetA
is
offsetB
before
if
offsetA
is less than
offsetB
, and
after
if
offsetA
is
greater than
offsetB
If
nodeA
is
following
nodeB
, then if the
position
of (
nodeB
offsetB
) relative to
nodeA
offsetA
) is
before
, return
after
, and if it is
after
, return
before
If
nodeA
is an
ancestor
of
nodeB
Let
child
be
nodeB
While
child
is not a
child
of
nodeA
, set
child
to its
parent
If
child
’s
index
is less than
offsetA
, then return
after
Return
before
5.3.
Interface
AbstractRange
Exposed
Window
interface
AbstractRange
readonly
attribute
Node
startContainer
readonly
attribute
unsigned
long
startOffset
readonly
attribute
Node
endContainer
readonly
attribute
unsigned
long
endOffset
readonly
attribute
boolean
collapsed
};
Objects implementing the
AbstractRange
interface are known as
ranges
range
has two associated
boundary points
— a
start
and
end
For convenience, a
range
’s
start node
is its
start
’s
node
, its
start offset
is its
start
’s
offset
, its
end node
is its
end
’s
node
, and its
end offset
is its
end
’s
offset
range
is
collapsed
if its
start node
is its
end node
and its
start offset
is its
end offset
node
range
startContainer
Returns
range
’s
start node
offset
range
startOffset
Returns
range
’s
start offset
node
range
endContainer
Returns
range
’s
end node
offset
range
endOffset
Returns
range
’s
end offset
collapsed
range
collapsed
Returns true if
range
is
collapsed
; otherwise false.
The
startContainer
getter steps are to return
this
’s
start node
The
startOffset
getter steps are to return
this
’s
start offset
The
endContainer
getter steps are to return
this
’s
end node
The
endOffset
getter steps are to return
this
’s
end offset
The
collapsed
getter steps are to return true if
this
is
collapsed
; otherwise false.
5.4.
Interface
StaticRange
dictionary
StaticRangeInit
required
Node
startContainer
required
unsigned
long
startOffset
required
Node
endContainer
required
unsigned
long
endOffset
};

Exposed
Window
interface
StaticRange
AbstractRange
constructor
StaticRangeInit
init
);
};
staticRange
= new
StaticRange
(init)
Returns a new
range
object that does not update when the
node tree
mutates.
The
new StaticRange(
init
constructor steps are:
If
init
["
startContainer
"] or
init
["
endContainer
"] is a
DocumentType
or
Attr
node
, then
throw
an "
InvalidNodeTypeError
DOMException
Set
this
’s
start
to
init
["
startContainer
"],
init
["
startOffset
"]) and
end
to
init
["
endContainer
"],
init
["
endOffset
"]).
StaticRange
is
valid
if all of the following are true:
Its
start
and
end
are in the same
node tree
Its
start offset
is between 0 and its
start node
’s
length
, inclusive.
Its
end offset
is between 0 and its
end node
’s
length
, inclusive.
Its
start
is
before
or
equal
to its
end
5.5.
Interface
Range
Exposed
Window
interface
Range
AbstractRange
constructor
();
readonly
attribute
Node
commonAncestorContainer
undefined
setStart
Node
node
unsigned
long
offset
);
undefined
setEnd
Node
node
unsigned
long
offset
);
undefined
setStartBefore
Node
node
);
undefined
setStartAfter
Node
node
);
undefined
setEndBefore
Node
node
);
undefined
setEndAfter
Node
node
);
undefined
collapse
optional
boolean
toStart
false
);
undefined
selectNode
Node
node
);
undefined
selectNodeContents
Node
node
);
const
unsigned
short
START_TO_START
= 0;
const
unsigned
short
START_TO_END
= 1;
const
unsigned
short
END_TO_END
= 2;
const
unsigned
short
END_TO_START
= 3;
short
compareBoundaryPoints
unsigned
short
how
Range
sourceRange
);

CEReactions
undefined
deleteContents
();
CEReactions
NewObject
DocumentFragment
extractContents
();
CEReactions
NewObject
DocumentFragment
cloneContents
();
CEReactions
undefined
insertNode
Node
node
);
CEReactions
undefined
surroundContents
Node
newParent
);

NewObject
Range
cloneRange
();
undefined
detach
();
boolean
isPointInRange
Node
node
unsigned
long
offset
);
short
comparePoint
Node
node
unsigned
long
offset
);
boolean
intersectsNode
Node
node
);
stringifier
};
Objects implementing the
Range
interface are known as
live ranges
Algorithms that modify a
tree
(in particular the
insert
remove
move
replace data
, and
split
algorithms) modify
live ranges
associated with that
tree
The
root
of a
live range
is the
root
of its
start node
node
node
is
contained
in a
live range
range
if
node
’s
root
is
range
’s
root
, and (
node
, 0) is
after
range
’s
start
, and
node
node
’s
length
) is
before
range
’s
end
node
is
partially contained
in a
live range
if it’s an
inclusive ancestor
of the
live range
’s
start node
but not its
end node
, or vice versa.
Some facts to better understand these definitions:
The content that one would think of as being within the
live range
consists of all
contained
nodes
, plus possibly some of the contents of the
start node
and
end node
if those are
CharacterData
nodes
The
nodes
that are contained in a
live range
will generally not be
contiguous, because the
parent
of a
contained
node
will not always be
contained
However, the
descendants
of a
contained
node
are
contained
, and if two
siblings
are
contained
, so are any
siblings
that lie between them.
The
start node
and
end node
of a
live range
are
never
contained
within it.
The first
contained
node
(if there are any) will
always be after the
start node
, and the last
contained
node
will always be equal to or before the
end node
’s last
descendant
There exists a
partially contained
node
if and only if
the
start node
and
end node
are different.
The
commonAncestorContainer
attribute value is neither
contained
nor
partially contained
If the
start node
is an
ancestor
of the
end node
, the common
inclusive ancestor
will be the
start node
. Exactly one of its
children
will be
partially contained
, and a
child
will be
contained
if and only if it
precedes
the
partially contained
child
. If the
end node
is an
ancestor
of the
start node
, the
opposite holds.
If the
start node
is not an
inclusive ancestor
of the
end node
, nor vice versa, the common
inclusive ancestor
will be
distinct from both of them. Exactly two of its
children
will be
partially contained
, and a
child
will be contained if and
only if it lies between those two.
The
live range pre-remove steps
given a
node
node
, are:
Let
parent
be
node
’s
parent
Assert
parent
is non-null.
Let
index
be
node
’s
index
For each
live range
whose
start node
is an
inclusive descendant
of
node
, set its
start
to
parent
index
).
For each
live range
whose
end node
is an
inclusive descendant
of
node
, set its
end
to (
parent
index
).
For each
live range
whose
start node
is
parent
and
start offset
is greater than
index
, decrease its
start offset
by 1.
For each
live range
whose
end node
is
parent
and
end offset
is greater than
index
, decrease its
end offset
by 1.
range
= new
Range()
Returns a new
live range
The
new Range()
constructor steps are
to set
this
’s
start
and
end
to
current global object
’s
associated
Document
, 0).
container
range
commonAncestorContainer
Returns the
node
, furthest away from the
document
, that is an
ancestor
of both
range
’s
start node
and
end node
The
commonAncestorContainer
getter steps are:
Let
container
be
start node
While
container
is not an
inclusive ancestor
of
end node
: set
container
to
container
’s
parent
Return
container
To
set the start or end
of a
range
to a
boundary point
node
offset
):
If
node
is a
doctype
, then
throw
an
InvalidNodeTypeError
DOMException
If
offset
is greater than
node
’s
length
, then
throw
an "
IndexSizeError
DOMException
Let
boundaryPoint
be the
boundary point
node
offset
).
If these steps were invoked as "set the start"
If
range
’s
root
is not
node
’s
root
or
boundaryPoint
is
after
range
’s
end
, then set
range
’s
end
to
boundaryPoint
Set
range
’s
start
to
boundaryPoint
If these steps were invoked as "set the end"
If
range
’s
root
is not
node
’s
root
or
boundaryPoint
is
before
range
’s
start
, then set
range
’s
start
to
boundaryPoint
Set
range
’s
end
to
boundaryPoint
The
setStart(
node
offset
method
steps are to
set the start
of
this
to
boundary point
node
offset
).
The
setEnd(
node
offset
method
steps are to
set the end
of
this
to
boundary point
node
offset
).
The
setStartBefore(
node
method steps are:
Let
parent
be
node
’s
parent
If
parent
is null, then
throw
an "
InvalidNodeTypeError
DOMException
Set the start
of
this
to
boundary point
parent
node
’s
index
).
The
setStartAfter(
node
method steps are:
Let
parent
be
node
’s
parent
If
parent
is null, then
throw
an "
InvalidNodeTypeError
DOMException
Set the start
of
this
to
boundary point
parent
node
’s
index
plus 1).
The
setEndBefore(
node
method steps are:
Let
parent
be
node
’s
parent
If
parent
is null, then
throw
an "
InvalidNodeTypeError
DOMException
Set the end
of
this
to
boundary point
parent
node
’s
index
).
The
setEndAfter(
node
method steps are:
Let
parent
be
node
’s
parent
If
parent
is null, then
throw
an "
InvalidNodeTypeError
DOMException
Set the end
of
this
to
boundary point
parent
node
’s
index
plus 1).
The
collapse(
toStart
method steps are to, if
toStart
is true, set
end
to
start
; otherwise set
start
to
end
To
select
node
node
within a
range
range
Let
parent
be
node
’s
parent
If
parent
is null, then
throw
an "
InvalidNodeTypeError
DOMException
Let
index
be
node
’s
index
Set
range
’s
start
to
boundary point
parent
index
).
Set
range
’s
end
to
boundary point
parent
index
plus 1).
The
selectNode(
node
method steps are to
select
node
within
this
The
selectNodeContents(
node
method steps
are:
If
node
is a
doctype
, then
throw
an
InvalidNodeTypeError
DOMException
Let
length
be the
length
of
node
Set
start
to the
boundary point
node
, 0).
Set
end
to the
boundary point
node
length
).
The
compareBoundaryPoints(
how
sourceRange
method steps are:
If
how
is not one of
START_TO_START
START_TO_END
END_TO_END
, and
END_TO_START
then
throw
a "
NotSupportedError
DOMException
If
this
’s
root
is not
sourceRange
’s
root
, then
throw
a "
WrongDocumentError
DOMException
Let
thisPoint
and
sourcePoint
be null.
Switch on
how
START_TO_START
Set
thisPoint
to
this
’s
start
and
sourcePoint
to
sourceRange
’s
start
START_TO_END
Set
thisPoint
to
this
’s
end
and
sourcePoint
to
sourceRange
’s
start
END_TO_END
Set
thisPoint
to
this
’s
end
and
sourcePoint
to
sourceRange
’s
end
END_TO_START
Set
thisPoint
to
this
’s
start
and
sourcePoint
to
sourceRange
’s
end
Switch on the
position
of
thisPoint
relative to
sourcePoint
before
Return −1.
equal
Return 0.
after
Return 1.
The
deleteContents()
method steps are:
If
this
is
collapsed
, then return.
Let
originalStartNode
originalStartOffset
originalEndNode
, and
originalEndOffset
be
this
’s
start node
start offset
end node
, and
end offset
, respectively.
If
originalStartNode
is
originalEndNode
and it is a
CharacterData
node
Replace data
of
originalStartNode
with
originalStartOffset
originalEndOffset
originalStartOffset
, and the empty string.
Return.
Let
nodesToRemove
be a list of all the
nodes
that are
contained
in
this
, in
tree order
, omitting any
node
whose
parent
is also
contained
in
this
Let
newNode
and
newOffset
be null.
If
originalStartNode
is an
inclusive ancestor
of
originalEndNode
, then set
newNode
to
originalStartNode
and
newOffset
to
originalStartOffset
Otherwise:
Let
referenceNode
be
originalStartNode
While
referenceNode
’s
parent
is non-null and is not an
inclusive ancestor
of
originalEndNode
: set
referenceNode
to
its
parent
Set
newNode
to
referenceNode
’s
parent
and
newOffset
to
referenceNode
’s
index
+ 1.
If
referenceNode
’s
parent
were null, it would be the
root
of
this
. And then it would be an
inclusive ancestor
of
originalEndNode
and we could not reach this
point.
Set
this
’s
start
and
end
to
newNode
newOffset
).
If
originalStartNode
is a
CharacterData
node
, then
replace data
of
originalStartNode
with
originalStartOffset
originalStartNode
’s
length
originalStartOffset
, and
the empty string.
For each
node
of
nodesToRemove
, in
tree order
remove
node
If
originalEndNode
is a
CharacterData
node
, then
replace data
of
originalEndNode
with 0,
originalEndOffset
, and
the empty string.
To
extract
live range
range
Let
fragment
be a new
DocumentFragment
node
whose
node document
is
range
’s
start node
’s
node document
If
range
is
collapsed
, then return
fragment
Let
originalStartNode
originalStartOffset
originalEndNode
, and
originalEndOffset
be
range
’s
start node
start offset
end node
, and
end offset
, respectively.
If
originalStartNode
is
originalEndNode
and it is a
CharacterData
node
Let
clone
be a
clone
of
originalStartNode
Set
clone
’s
data
to the result of
substringing data
of
originalStartNode
with
originalStartOffset
and
originalEndOffset
originalStartOffset
Append
clone
to
fragment
Replace data
of
originalStartNode
with
originalStartOffset
originalEndOffset
originalStartOffset
, and the empty string.
Return
fragment
Let
commonAncestor
be
originalStartNode
While
commonAncestor
is not an
inclusive ancestor
of
originalEndNode
: set
commonAncestor
to its own
parent
Let
firstPartiallyContainedChild
be null.
If
originalStartNode
is not an
inclusive ancestor
of
originalEndNode
, then set
firstPartiallyContainedChild
to the first
child
of
commonAncestor
that is
partially contained
in
range
Let
lastPartiallyContainedChild
be null.
If
originalEndNode
is not an
inclusive ancestor
of
originalStartNode
, then set
lastPartiallyContainedChild
to the last
child
of
commonAncestor
that is
partially contained
in
range
These variable assignments do actually always make sense. For instance, if
originalStartNode
is not an
inclusive ancestor
of
originalEndNode
originalStartNode
is itself
partially contained
in
range
, and so are all its
ancestors
up until a
child
of
commonAncestor
commonAncestor
cannot be
originalStartNode
, because it has to be an
inclusive ancestor
of
originalEndNode
. The other case is similar. Also,
notice that the two
children
will never be equal if both are defined.
Let
containedChildren
be a list of all
children
of
commonAncestor
that are
contained
in
range
, in
tree order
If any member of
containedChildren
is a
doctype
, then
throw
HierarchyRequestError
DOMException
We do not have to worry about the first or last partially
contained node, because a
doctype
can never be
partially contained. It cannot be a boundary point of a range, and it
cannot be the ancestor of anything.
Let
newNode
and
newOffset
be null.
If
originalStartNode
is an
inclusive ancestor
of
originalEndNode
, then set
newNode
to
originalStartNode
and
newOffset
to
originalStartOffset
Otherwise:
Let
referenceNode
be
originalStartNode
While
referenceNode
’s
parent
is non-null and is not an
inclusive ancestor
of
originalEndNode
: set
referenceNode
to
its
parent
Set
newNode
to the
parent
of
referenceNode
, and
newOffset
to
referenceNode
’s
index
+ 1.
If
referenceNode
’s
parent
is null, it would be the
root
of
range
. And then it would be an
inclusive ancestor
of
originalEndNode
and we could not reach this
point.
Set
range
’s
start
and
end
to
newNode
newOffset
).
If
firstPartiallyContainedChild
is a
CharacterData
node
In this case,
firstPartiallyContainedChild
is
originalStartNode
Let
clone
be a
clone
of
originalStartNode
Set the
data
of
clone
to the result of
substringing data
of
originalStartNode
with
originalStartOffset
and
originalStartNode
’s
length
originalStartOffset
Append
clone
to
fragment
Replace data
of
originalStartNode
with
originalStartOffset
originalStartNode
’s
length
originalStartOffset
, and
the empty string.
Otherwise, if
firstPartiallyContainedChild
is non-null:
Let
clone
be a
clone
of
firstPartiallyContainedChild
Append
clone
to
fragment
Let
subrange
be a new
live range
whose
start
is
originalStartNode
originalStartOffset
) and whose
end
is
firstPartiallyContainedChild
firstPartiallyContainedChild
’s
length
).
Let
subfragment
be the result of
extracting
subrange
Append
subfragment
to
clone
For each
contained child
of
containedChildren
append
contained child
to
fragment
If
lastPartiallyContainedChild
is a
CharacterData
node
In this case,
lastPartiallyContainedChild
is
originalEndNode
Let
clone
be a
clone
of
originalEndNode
Set
clone
’s
data
to the result of
substringing data
of
originalEndNode
with 0 and
originalEndOffset
Append
clone
to
fragment
Replace data
of
originalEndNode
with 0,
originalEndOffset
and the empty string.
Otherwise, if
lastPartiallyContainedChild
is non-null:
Let
clone
be a
clone
of
lastPartiallyContainedChild
Append
clone
to
fragment
Let
subrange
be a new
live range
whose
start
is
lastPartiallyContainedChild
, 0) and whose
end
is
originalEndNode
originalEndOffset
).
Let
subfragment
be the result of
extracting
subrange
Append
subfragment
to
clone
Return
fragment
The
extractContents()
method steps are to return the
result of
extracting
this
To
clone the contents
of a
live range
range
Let
fragment
be a new
DocumentFragment
node
whose
node document
is
range
’s
start node
’s
node document
If
range
is
collapsed
, then return
fragment
Let
originalStartNode
originalStartOffset
originalEndNode
, and
originalEndOffset
be
range
’s
start node
start offset
end node
, and
end offset
, respectively.
If
originalStartNode
is
originalEndNode
and it is a
CharacterData
node
Let
clone
be a
clone
of
originalStartNode
Set
clone
’s
data
to the result of
substringing data
of
originalStartNode
with
originalStartOffset
and
originalEndOffset
originalStartOffset
Append
clone
to
fragment
Return
fragment
Let
commonAncestor
be
originalStartNode
While
commonAncestor
is not an
inclusive ancestor
of
originalEndNode
: set
commonAncestor
to its own
parent
Let
firstPartiallyContainedChild
be null.
If
originalStartNode
is not an
inclusive ancestor
of
originalEndNode
, then set
firstPartiallyContainedChild
to the first
child
of
commonAncestor
that is
partially contained
in
range
Let
lastPartiallyContainedChild
be null.
If
originalEndNode
is not an
inclusive ancestor
of
originalStartNode
, then set
lastPartiallyContainedChild
to the last
child
of
commonAncestor
that is
partially contained
in
range
These variable assignments do actually always make sense. For instance, if
originalStartNode
is not an
inclusive ancestor
of
originalEndNode
originalStartNode
is itself
partially contained
in
range
, and so are all its
ancestors
up until a
child
of
commonAncestor
commonAncestor
cannot be
originalStartNode
, because it has to be an
inclusive ancestor
of
originalEndNode
. The other case is similar. Also,
notice that the two
children
will never be equal if both are defined.
Let
containedChildren
be a list of all
children
of
commonAncestor
that are
contained
in
range
, in
tree order
If any member of
containedChildren
is a
doctype
, then
throw
HierarchyRequestError
DOMException
We do not have to worry about the first or last partially
contained node, because a
doctype
can never be
partially contained. It cannot be a boundary point of a range, and it
cannot be the ancestor of anything.
If
firstPartiallyContainedChild
is a
CharacterData
node
In this case,
firstPartiallyContainedChild
is
originalStartNode
Let
clone
be a
clone
of
originalStartNode
Set the
data
of
clone
to the result of
substringing data
of
originalStartNode
with
originalStartOffset
and
originalStartNode
’s
length
originalStartOffset
Append
clone
to
fragment
Otherwise, if
firstPartiallyContainedChild
is non-null:
Let
clone
be a
clone
of
firstPartiallyContainedChild
Append
clone
to
fragment
Let
subrange
be a new
live range
whose
start
is
originalStartNode
originalStartOffset
) and whose
end
is
firstPartiallyContainedChild
firstPartiallyContainedChild
’s
length
).
Let
subfragment
be the result of
cloning the contents
of
subrange
Append
subfragment
to
clone
For each
contained child
of
containedChildren
Let
clone
be a
clone
of
contained child
with
subtree
set to true.
Append
clone
to
fragment
If
lastPartiallyContainedChild
is a
CharacterData
node
In this case,
lastPartiallyContainedChild
is
originalEndNode
Let
clone
be a
clone
of
originalEndNode
Set
clone
’s
data
to the result of
substringing data
of
originalEndNode
with 0 and
originalEndOffset
Append
clone
to
fragment
Otherwise, if
lastPartiallyContainedChild
is non-null:
Let
clone
be a
clone
of
lastPartiallyContainedChild
Append
clone
to
fragment
Let
subrange
be a new
live range
whose
start
is
lastPartiallyContainedChild
, 0) and whose
end
is
originalEndNode
originalEndOffset
).
Let
subfragment
be the result of
cloning the contents
of
subrange
Append
subfragment
to
clone
Return
fragment
The
cloneContents()
method steps are to return the
result of
cloning the contents
of
this
To
insert
node
node
into a
live range
range
If
range
’s
start node
is a
ProcessingInstruction
or
Comment
node
, is a
Text
node
whose
parent
is
null, or is
node
, then
throw
a "
HierarchyRequestError
DOMException
Let
referenceNode
be null.
If
range
’s
start node
is a
Text
node
, then set
referenceNode
to that
Text
node
Otherwise, set
referenceNode
to the
child
of
range
’s
start node
whose
index
is
range
’s
start offset
if there is such a
child
; otherwise null.
Let
parent
be
range
’s
start node
if
referenceNode
is null; otherwise
referenceNode
’s
parent
Ensure pre-insert validity
of
node
into
parent
before
referenceNode
If
range
’s
start node
is a
Text
node
, then set
referenceNode
to the result of
splitting
it with offset
range
’s
start offset
If
node
is
referenceNode
, then set
referenceNode
to its
next sibling
If
node
’s
parent
is non-null, then
remove
node
Let
newOffset
be
parent
’s
length
if
referenceNode
is null; otherwise
referenceNode
’s
index
Increase
newOffset
by
node
’s
length
if
node
is a
DocumentFragment
node
; otherwise 1.
Pre-insert
node
into
parent
before
referenceNode
If
range
is
collapsed
, then set
range
’s
end
to (
parent
newOffset
).
The
insertNode(
node
method steps are to
insert
node
into
this
The
surroundContents(
newParent
method steps
are:
If a non-
Text
node
is
partially contained
in
this
, then
throw
an "
InvalidStateError
DOMException
If
newParent
is a
Document
DocumentType
, or
DocumentFragment
node
, then
throw
an "
InvalidNodeTypeError
DOMException
For historical reasons
CharacterData
nodes
are not checked here and end up throwing later on as a side effect.
Let
fragment
be the result of
extracting
this
If
newParent
has
children
, then
replace all
with
null within
newParent
Insert
newParent
into
this
Append
fragment
to
newParent
Select
newParent
within
this
The
cloneRange()
method steps are to return a new
live range
with the same
start
and
end
as
this
The
detach()
method steps are to do nothing.
Its functionality (disabling a
Range
object) was removed, but the method itself
is preserved for compatibility.
position
range
comparePoint(node, offset)
Returns −1 if the point is before the range, 0 if the point is
in the range, and 1 if the point is after the range.
intersects
range
intersectsNode(node)
Returns whether
range
intersects
node
The
isPointInRange(
node
offset
method steps are:
If
node
’s
root
is not
this
’s
root
then return false.
If
node
is a
doctype
, then
throw
an
InvalidNodeTypeError
DOMException
If
offset
is greater than
node
’s
length
, then
throw
an "
IndexSizeError
DOMException
If (
node
offset
) is
before
start
or
after
end
, then return
false.
Return true.
The
comparePoint(
node
offset
method steps are:
If
node
’s
root
is not
this
’s
root
then
throw
a "
WrongDocumentError
DOMException
If
node
is a
doctype
, then
throw
an
InvalidNodeTypeError
DOMException
If
offset
is greater than
node
’s
length
, then
throw
an "
IndexSizeError
DOMException
If (
node
offset
) is
before
start
, then return −1.
If (
node
offset
) is
after
end
, then return 1.
Return 0.
The
intersectsNode(
node
method steps are:
If
node
’s
root
is not
this
’s
root
then return false.
Let
parent
be
node
’s
parent
If
parent
is null, then return true.
Let
offset
be
node
’s
index
If (
parent
offset
) is
before
end
and (
parent
offset
+ 1) is
after
start
, then return true.
Return false.
The
stringification behavior
must run
these steps:
Let
string
be the empty string.
If
this
’s
start node
is
this
’s
end node
and
it is a
Text
node
, then return the substring of that
Text
node
’s
data
beginning at
this
’s
start offset
and ending
at
this
’s
end offset
If
this
’s
start node
is a
Text
node
, then append
the substring of that
node
’s
data
from
this
’s
start offset
until the end to
string
Append the
concatenation
of the
data
of all
Text
nodes
that are
contained
in
this
, in
tree order
, to
string
If
this
’s
end node
is a
Text
node
, then
append the substring of that
node
’s
data
from its start until
this
’s
end offset
to
string
Return
string
The
createContextualFragment()
getClientRects()
and
getBoundingClientRect()
methods are defined in other specifications.
[DOM-Parsing]
[CSSOM-VIEW]
6.
Traversal
NodeIterator
and
TreeWalker
objects can be used to filter and traverse
node
trees
Each
NodeIterator
and
TreeWalker
object has an associated boolean
is active
to avoid recursive invocations. It is
initially false.
Each
NodeIterator
and
TreeWalker
object also has an associated
root
(a
node
), a
whatToShow
(a bitmask), and a
filter
(a callback).
To
filter
node
node
within
NodeIterator
or
TreeWalker
object
traverser
If
traverser
’s
is active
is true, then throw an
InvalidStateError
DOMException
Let
be
node
’s
nodeType
attribute value − 1.
If the
th
bit (where 0 is the least significant bit) of
traverser
’s
whatToShow
is not set, then return
FILTER_SKIP
If
traverser
’s
filter
is null, then return
FILTER_ACCEPT
Set
traverser
’s
is active
to true.
Let
result
be the return value of
call a user object’s operation
with
traverser
’s
filter
, "
acceptNode
", and
node
». If this throws an exception, then set
traverser
’s
is active
to false and rethrow the exception.
Set
traverser
’s
is active
to false.
Return
result
6.1.
Interface
NodeIterator
Exposed
Window
interface
NodeIterator
SameObject
readonly
attribute
Node
root
readonly
attribute
Node
referenceNode
readonly
attribute
boolean
pointerBeforeReferenceNode
readonly
attribute
unsigned
long
whatToShow
readonly
attribute
NodeFilter
filter
Node
nextNode
();
Node
previousNode
();
undefined
detach
();
};
NodeIterator
objects can be created using the
createNodeIterator()
method on
Document
objects.
Each
NodeIterator
object has an associated
iterator collection
, which is a
collection
rooted at the
NodeIterator
object’s
root
, whose
filter matches any
node
Each
NodeIterator
object also has an associated
reference
(a
node
) and
pointer before reference
(a boolean).
As mentioned earlier,
NodeIterator
objects have an associated
is active
root
whatToShow
, and
filter
as well.
The
NodeIterator
pre-remove steps
given a
NodeIterator
object
nodeIterator
and
node
toBeRemovedNode
, are:
If
toBeRemovedNode
is not an
inclusive ancestor
of
nodeIterator
’s
reference
, or
toBeRemovedNode
is
nodeIterator
’s
root
, then return.
If
nodeIterator
’s
pointer before reference
is true:
Let
next
be
toBeRemovedNode
’s first
following
node
that is an
inclusive descendant
of
nodeIterator
’s
root
and is not an
inclusive descendant
of
toBeRemovedNode
, if there is such a
node
; otherwise null.
If
next
is non-null, then set
nodeIterator
’s
reference
to
next
and return.
Set
nodeIterator
’s
pointer before reference
to false.
Set
nodeIterator
’s
reference
to
toBeRemovedNode
’s
parent
, if
toBeRemovedNode
’s
previous sibling
is null; otherwise to the
inclusive descendant
of
toBeRemovedNode
’s
previous sibling
that appears last in
tree order
The
root
getter steps are to return
this
’s
root
The
referenceNode
getter steps are to return
this
’s
reference
The
pointerBeforeReferenceNode
getter steps
are to return
this
’s
pointer before reference
The
whatToShow
getter steps are to return
this
’s
whatToShow
The
filter
getter steps are to return
this
’s
filter
To
traverse
, given a
NodeIterator
object
iterator
and "
next
" or "
previous
type
Let
node
be
iterator
’s
reference
Let
beforeNode
be
iterator
’s
pointer before reference
While true:
If
type
is
next
":
If
beforeNode
is false, then set
node
to the first
node
following
node
in
iterator
’s
iterator collection
. If there is no such
node
, then return
null.
If
beforeNode
is true, then set it to false.
Otherwise:
If
beforeNode
is true, then set
node
to the first
node
preceding
node
in
iterator
’s
iterator collection
. If there is no such
node
, then return
null.
If
beforeNode
is false, then set it to true.
Let
result
be the result of
filtering
node
within
iterator
If
result
is
FILTER_ACCEPT
, then
break
Set
iterator
’s
reference
to
node
Set
iterator
’s
pointer before reference
to
beforeNode
Return
node
The
nextNode()
method steps are to return the
result of
traversing
with
this
and "
next
".
The
previousNode()
method steps are to return the
result of
traversing
with
this
and "
previous
".
The
detach()
method steps are to do nothing.
Its functionality (disabling a
NodeIterator
object) was removed, but the method
itself is preserved for compatibility.
6.2.
Interface
TreeWalker
Exposed
Window
interface
TreeWalker
SameObject
readonly
attribute
Node
root
readonly
attribute
unsigned
long
whatToShow
readonly
attribute
NodeFilter
filter
attribute
Node
currentNode
Node
parentNode
();
Node
firstChild
();
Node
lastChild
();
Node
previousSibling
();
Node
nextSibling
();
Node
previousNode
();
Node
nextNode
();
};
TreeWalker
objects can be created using the
createTreeWalker()
method on
Document
objects.
Each
TreeWalker
object has an associated
current
(a
node
).
As mentioned earlier
TreeWalker
objects have an associated
root
whatToShow
, and
filter
as well.
The
root
getter steps are to return
this
’s
root
The
whatToShow
getter steps are to return
this
’s
whatToShow
The
filter
getter steps are to return
this
’s
filter
The
currentNode
getter steps are to return
this
’s
current
The
currentNode
setter steps are to set
this
’s
current
to the given value.
The
parentNode()
method steps are:
Let
node
be
this
’s
current
While
node
is non-null and is not
this
’s
root
Set
node
to
node
’s
parent
If
node
is non-null and
filtering
node
within
this
returns
FILTER_ACCEPT
, then set
this
’s
current
to
node
and return
node
Return null.
To
traverse children
, given a
TreeWalker
object
walker
and "
first
" or "
last
type
Let
node
be
walker
’s
current
Set
node
to
node
’s
first child
if
type
is
first
"; otherwise to
node
’s
last child
While
node
is non-null:
Let
result
be the result of
filtering
node
within
walker
If
result
is
FILTER_ACCEPT
, then set
walker
’s
current
to
node
and return
node
If
result
is
FILTER_SKIP
Let
child
be
node
’s
first child
if
type
is "
first
"; otherwise
node
’s
last child
If
child
is non-null, then set
node
to
child
and
continue
While
node
is non-null:
Let
sibling
be
node
’s
next sibling
if
type
is "
first
"; otherwise
node
’s
previous sibling
If
sibling
is non-null, then set
node
to
sibling
and
break
Let
parent
be
node
’s
parent
If
parent
is null,
walker
’s
root
, or
walker
’s
current
, then return null.
Set
node
to
parent
Return null.
The
firstChild()
method steps are to
traverse children
with
this
and "
first
".
The
lastChild()
method steps are to
traverse children
with
this
and "
last
".
To
traverse siblings
, given a
TreeWalker
object
walker
and "
next
" or "
previous
type
Let
node
be
walker
’s
current
If
node
is
root
, then return null.
While true:
Let
sibling
be
node
’s
next sibling
if
type
is "
next
"; otherwise
node
’s
previous sibling
While
sibling
is non-null:
Set
node
to
sibling
Let
result
be the result of
filtering
node
within
walker
If
result
is
FILTER_ACCEPT
, then set
walker
’s
current
to
node
and return
node
Set
sibling
to
node
’s
first child
if
type
is "
next
"; otherwise to
node
’s
last child
If
result
is
FILTER_REJECT
or
sibling
is null, then
set
sibling
to
node
’s
next sibling
if
type
is
next
"; otherwise to
node
’s
previous sibling
Set
node
to
node
’s
parent
If
node
is null or
walker
’s
root
, then return
null.
If the return value of
filtering
node
within
walker
is
FILTER_ACCEPT
, then return null.
The
nextSibling()
method steps are to
traverse siblings
with
this
and "
next
".
The
previousSibling()
method steps are to
traverse siblings
with
this
and "
previous
".
The
previousNode()
method steps are:
Let
node
be
this
’s
current
While
node
is not
this
’s
root
Let
sibling
be
node
’s
previous sibling
While
sibling
is non-null:
Set
node
to
sibling
Let
result
be the result of
filtering
node
within
this
While
result
is not
FILTER_REJECT
and
node
has a
child
Set
node
to
node
’s
last child
Set
result
to the result of
filtering
node
within
this
If
result
is
FILTER_ACCEPT
, then set
this
’s
current
to
node
and return
node
Set
sibling
to
node
’s
previous sibling
If
node
is
this
’s
root
or
node
’s
parent
is null, then return null.
Set
node
to
node
’s
parent
If the return value of
filtering
node
within
this
is
FILTER_ACCEPT
, then set
this
’s
current
to
node
and return
node
Return null.
The
nextNode()
method steps are:
Let
node
be
this
’s
current
Let
result
be
FILTER_ACCEPT
While true:
While
result
is not
FILTER_REJECT
and
node
has a
child
Set
node
to its
first child
Set
result
to the result of
filtering
node
within
this
If
result
is
FILTER_ACCEPT
, then set
this
’s
current
to
node
and return
node
Let
sibling
be null.
Let
temporary
be
node
While
temporary
is non-null:
If
temporary
is
this
’s
root
, then return null.
Set
sibling
to
temporary
’s
next sibling
If
sibling
is non-null, then set
node
to
sibling
and
break
Set
temporary
to
temporary
’s
parent
Set
result
to the result of
filtering
node
within
this
If
result
is
FILTER_ACCEPT
, then set
this
’s
current
to
node
and return
node
6.3.
Interface
NodeFilter
Exposed
Window
callback
interface
NodeFilter
// Constants for acceptNode()
const
unsigned
short
FILTER_ACCEPT
= 1;
const
unsigned
short
FILTER_REJECT
= 2;
const
unsigned
short
FILTER_SKIP
= 3;

// Constants for whatToShow
const
unsigned
long
SHOW_ALL
= 0xFFFFFFFF;
const
unsigned
long
SHOW_ELEMENT
= 0x1;
const
unsigned
long
SHOW_ATTRIBUTE
= 0x2;
const
unsigned
long
SHOW_TEXT
= 0x4;
const
unsigned
long
SHOW_CDATA_SECTION
= 0x8;
const
unsigned
long
SHOW_ENTITY_REFERENCE
= 0x10; // legacy
const
unsigned
long
SHOW_ENTITY
= 0x20; // legacy
const
unsigned
long
SHOW_PROCESSING_INSTRUCTION
= 0x40;
const
unsigned
long
SHOW_COMMENT
= 0x80;
const
unsigned
long
SHOW_DOCUMENT
= 0x100;
const
unsigned
long
SHOW_DOCUMENT_TYPE
= 0x200;
const
unsigned
long
SHOW_DOCUMENT_FRAGMENT
= 0x400;
const
unsigned
long
SHOW_NOTATION
= 0x800; // legacy
unsigned
short
acceptNode
Node
node
);
};
NodeFilter
objects can be used as
filter
for
NodeIterator
and
TreeWalker
objects and also provide constants for their
whatToShow
bitmask. A
NodeFilter
object is typically implemented as a
JavaScript function.
These constants can be used as
filter
return value:
FILTER_ACCEPT
(1);
FILTER_REJECT
(2);
FILTER_SKIP
(3).
These constants can be used for
whatToShow
SHOW_ALL
(4294967295, FFFFFFFF in hexadecimal);
SHOW_ELEMENT
(1);
SHOW_ATTRIBUTE
(2);
SHOW_TEXT
(4);
SHOW_CDATA_SECTION
(8);
SHOW_PROCESSING_INSTRUCTION
(64, 40 in hexadecimal);
SHOW_COMMENT
(128, 80 in hexadecimal);
SHOW_DOCUMENT
(256, 100 in hexadecimal);
SHOW_DOCUMENT_TYPE
(512, 200 in hexadecimal);
SHOW_DOCUMENT_FRAGMENT
(1024, 400 in hexadecimal).
7.
Sets
Yes, the name
DOMTokenList
is an unfortunate legacy mishap.
7.1.
Interface
DOMTokenList
Exposed
Window
interface
DOMTokenList
readonly
attribute
unsigned
long
length
getter
DOMString
item
unsigned
long
index
);
boolean
contains
DOMString
token
);
CEReactions
undefined
add
DOMString
...
tokens
);
CEReactions
undefined
remove
DOMString
...
tokens
);
CEReactions
boolean
toggle
DOMString
token
optional
boolean
force
);
CEReactions
boolean
replace
DOMString
token
DOMString
newToken
);
boolean
supports
DOMString
token
);
CEReactions
stringifier
attribute
DOMString
value
iterable
DOMString
>;
};
DOMTokenList
object has an associated
token set
(a
set
), which is
initially empty.
DOMTokenList
object also has an associated
element
(an
element
) and an
attribute name
(an
attribute
’s
local name
).
Specifications
may define
supported tokens
for a
DOMTokenList
’s
element
and
attribute name
DOMTokenList
object
set
’s
validation steps
for a given
token
are:
If
set
’s
element
and
attribute name
does not define
supported tokens
, then
throw
TypeError
Let
lowercaseToken
be
token
, in
ASCII lowercase
If
lowercaseToken
is present in the
supported tokens
of
set
’s
element
and
attribute name
, then
return true.
Return false.
DOMTokenList
object
set
’s
update steps
are:
If
get an attribute by namespace and local name
given null,
set
’s
attribute name
, and
set
’s
element
returns null and
set
’s
token set
is empty, then return.
Set an attribute value
given
set
’s
element
set
’s
attribute name
, and the result of running the
ordered set serializer
for
set
’s
token set
DOMTokenList
object
set
’s
serialize steps
are to return the result of
running
get an attribute value
given
set
’s
element
and
set
’s
attribute name
DOMTokenList
object
set
has these
attribute change steps
for
set
’s
element
If
localName
is
set
’s
attribute name
namespace
is null, and
value
is null, then
empty
token set
Otherwise, if
localName
is
set
’s
attribute name
and
namespace
is null, then set
set
’s
token set
to
value
parsed
When a
DOMTokenList
object
set
is created:
Let
element
be
set
’s
element
Let
attributeName
be
set
’s
attribute name
Let
value
be the result of
getting an attribute value
given
element
and
attributeName
Run the
attribute change steps
for
element
attributeName
value
value
, and null.
tokenlist
length
Returns the number of tokens.
tokenlist
item(index)
tokenlist
index
Returns the token with index
index
tokenlist
contains(token)
Returns true if
token
is present; otherwise false.
tokenlist
add(
tokens
…)
Adds all arguments passed, except those already present.
Throws a "
SyntaxError
DOMException
if one of the arguments is the empty
string.
Throws an "
InvalidCharacterError
DOMException
if one of the arguments
contains any
ASCII whitespace
tokenlist
remove(
tokens
…)
Removes arguments passed, if they are present.
Throws a "
SyntaxError
DOMException
if one of the arguments is the empty
string.
Throws an "
InvalidCharacterError
DOMException
if one of the arguments
contains any
ASCII whitespace
tokenlist
toggle(
token
[,
force
])
If
force
is not given, "toggles"
token
, removing it if it’s present and
adding it if it’s not present. If
force
is true, adds
token
(same as
add()
). If
force
is false, removes
token
(same
as
remove()
).
Returns true if
token
is now present; otherwise false.
Throws a "
SyntaxError
DOMException
if
token
is empty.
Throws an "
InvalidCharacterError
DOMException
if
token
contains
any spaces.
tokenlist
replace(
token
newToken
Replaces
token
with
newToken
Returns true if
token
was replaced with
newToken
; otherwise false.
Throws a "
SyntaxError
DOMException
if one of the arguments is the empty
string.
Throws an "
InvalidCharacterError
DOMException
if one of the arguments
contains any
ASCII whitespace
tokenlist
supports(
token
Returns true if
token
is in the associated attribute’s supported tokens. Returns
false otherwise.
Throws a
TypeError
if the associated attribute has no supported tokens defined.
tokenlist
value
Returns the associated set as string.
Can be set, to change the associated attribute.
The
length
getter steps are to return
this
’s
token set
’s
size
The object’s
supported property indices
are the numbers in the range zero to object’s
token set
’s
size
− 1, unless
token set
is empty
in which case there are no
supported property indices
The
item(
index
method steps are:
If
index
is equal to or greater than
this
’s
token set
’s
size
, then return null.
Return
this
’s
token set
index
].
The
contains(
token
method steps are
to return true if
this
’s
token set
token
exists
; otherwise
false.
The
add(
tokens
…)
method steps are:
For each
token
of
tokens
If
token
is the empty string, then
throw
a "
SyntaxError
DOMException
If
token
contains any
ASCII whitespace
, then
throw
an
InvalidCharacterError
DOMException
For each
token
of
tokens
append
token
to
this
’s
token set
Run the
update steps
The
remove(
tokens
…)
method steps are:
For each
token
of
tokens
If
token
is the empty string, then
throw
a "
SyntaxError
DOMException
If
token
contains any
ASCII whitespace
, then
throw
an
InvalidCharacterError
DOMException
For each
token
of
tokens
remove
token
from
this
’s
token set
Run the
update steps
The
toggle(
token
force
method steps are:
If
token
is the empty string, then
throw
a "
SyntaxError
DOMException
If
token
contains any
ASCII whitespace
, then
throw
an
InvalidCharacterError
DOMException
If
this
’s
token set
token
exists
If
force
is either not given or is false, then
remove
token
from
this
’s
token set
, run the
update steps
and return
false.
Return true.
Otherwise, if
force
not given or is true,
append
token
to
this
’s
token set
, run the
update steps
, and return true.
Return false.
The
update steps
are not always run for
toggle()
for web compatibility.
The
replace(
token
newToken
method steps are:
If either
token
or
newToken
is the empty string, then
throw
SyntaxError
DOMException
If either
token
or
newToken
contains any
ASCII whitespace
, then
throw
an "
InvalidCharacterError
DOMException
If
this
’s
token set
does not
contain
token
, then
return false.
Replace
token
in
this
’s
token set
with
newToken
Run the
update steps
Return true.
The
update steps
are not always run for
replace()
for web compatibility.
The
supports(
token
method steps are:
Let
result
be the return value of
validation steps
called with
token
Return
result
The
value
getter steps are to return the
result of running
this
’s
serialize steps
The
value
setter steps are to
set an attribute value
for
this
’s
element
using
this
’s
attribute name
and the given value.
8.
XPath
DOM Level 3 XPath
defined an API for evaluating
XPath 1.0
expressions. These APIs are widely implemented, but have not been maintained. The interface
definitions are maintained here so that they can be updated when
Web IDL
changes.
Complete definitions of these APIs remain necessary and such work is tracked and can be contributed
to in
whatwg/dom#67
[DOM-Level-3-XPath]
[XPath]
[WEBIDL]
8.1.
Interface
XPathResult
Exposed
Window
interface
XPathResult
const
unsigned
short
ANY_TYPE
= 0;
const
unsigned
short
NUMBER_TYPE
= 1;
const
unsigned
short
STRING_TYPE
= 2;
const
unsigned
short
BOOLEAN_TYPE
= 3;
const
unsigned
short
UNORDERED_NODE_ITERATOR_TYPE
= 4;
const
unsigned
short
ORDERED_NODE_ITERATOR_TYPE
= 5;
const
unsigned
short
UNORDERED_NODE_SNAPSHOT_TYPE
= 6;
const
unsigned
short
ORDERED_NODE_SNAPSHOT_TYPE
= 7;
const
unsigned
short
ANY_UNORDERED_NODE_TYPE
= 8;
const
unsigned
short
FIRST_ORDERED_NODE_TYPE
= 9;
readonly
attribute
unsigned
short
resultType
readonly
attribute
unrestricted
double
numberValue
readonly
attribute
DOMString
stringValue
readonly
attribute
boolean
booleanValue
readonly
attribute
Node
singleNodeValue
readonly
attribute
boolean
invalidIteratorState
readonly
attribute
unsigned
long
snapshotLength
Node
iterateNext
();
Node
snapshotItem
unsigned
long
index
);
};
8.2.
Interface
XPathExpression
Exposed
Window
interface
XPathExpression
// XPathResult.ANY_TYPE = 0
XPathResult
evaluate
Node
contextNode
optional
unsigned
short
type
= 0,
optional
XPathResult
result
null
);
};
8.3.
Mixin
XPathEvaluatorBase
callback
interface
XPathNSResolver
DOMString
lookupNamespaceURI
DOMString
prefix
);
};
interface
mixin
XPathEvaluatorBase
NewObject
XPathExpression
createExpression
DOMString
expression
optional
XPathNSResolver
resolver
null
);
Node
createNSResolver
Node
nodeResolver
); // legacy
// XPathResult.ANY_TYPE = 0
XPathResult
evaluate
DOMString
expression
Node
contextNode
optional
XPathNSResolver
resolver
null
optional
unsigned
short
type
= 0,
optional
XPathResult
result
null
);
};
Document
includes
XPathEvaluatorBase
The
createNSResolver(
nodeResolver
method steps are to return
nodeResolver
This method exists only for historical reasons.
8.4.
Interface
XPathEvaluator
Exposed
Window
interface
XPathEvaluator
constructor
();
};
XPathEvaluator
includes
XPathEvaluatorBase
For historical reasons you can both construct
XPathEvaluator
and access the same
methods on
Document
9.
XSLT
XSL Transformations (XSLT)
is a language for transforming XML documents
into other XML documents. The APIs defined in this section have been widely implemented, and are
maintained here so that they can be updated when
Web IDL
changes. Complete definitions
of these APIs remain necessary and such work is tracked and can be contributed to in
whatwg/dom#181
[XSLT]
9.1.
Interface
XSLTProcessor
Exposed
Window
interface
XSLTProcessor
constructor
();
undefined
importStylesheet
Node
style
);
CEReactions
DocumentFragment
transformToFragment
Node
source
Document
output
);
CEReactions
Document
transformToDocument
Node
source
);
undefined
setParameter
([
LegacyNullToEmptyString
DOMString
namespaceURI
DOMString
localName
any
value
);
any
getParameter
([
LegacyNullToEmptyString
DOMString
namespaceURI
DOMString
localName
);
undefined
removeParameter
([
LegacyNullToEmptyString
DOMString
namespaceURI
DOMString
localName
);
undefined
clearParameters
();
undefined
reset
();
};
10.
Security and privacy considerations
There are no known security or privacy considerations for this standard.
11.
Historical
This standard used to contain several interfaces and interface members that have been removed.
These interfaces have been removed:
DOMConfiguration
DOMError
DOMErrorHandler
DOMImplementationList
DOMImplementationSource
DOMLocator
DOMObject
DOMUserData
Entity
EntityReference
MutationEvent
MutationNameEvent
NameList
Notation
RangeException
TypeInfo
UserDataHandler
And these interface members have been removed:
Attr
schemaTypeInfo
isId
Document
createEntityReference()
xmlEncoding
xmlStandalone
xmlVersion
strictErrorChecking
domConfig
normalizeDocument()
renameNode()
DocumentType
entities
notations
internalSubset
DOMImplementation
getFeature()
Element
schemaTypeInfo
setIdAttribute()
setIdAttributeNS()
setIdAttributeNode()
Node
isSupported
getFeature()
getUserData()
setUserData()
NodeIterator
expandEntityReferences
Text
isElementContentWhitespace
replaceWholeText()
TreeWalker
expandEntityReferences
Acknowledgments
There have been a lot of people that have helped make DOM more interoperable over the years and
thereby furthered the goals of this standard. Likewise many people have helped making this standard
what it is today.
With that, many thanks to
Adam Klein,
Adrian Bateman,
Ahmid
snuggs
Alex Komoroske,
Alex Russell,
Alexey Shvayka,
Andreas Kling,
Andreu Botella,
Anthony Ramine,
Arkadiusz Michalski,
Arnaud Le Hors,
Arun Ranganathan,
Benjamin Gruenbaum,
Björn Höhrmann,
Boris Zbarsky,
Brandon Payton,
Brandon Slade,
Brandon Wallace,
Brian Kardell,
C. Scott Ananian,
Cameron McCormack,
Chris Dumez,
Chris Paris,
Chris Rebert,
Cyrille Tuzi,
Dan Burzo,
Daniel Clark,
Daniel Glazman,
Darien Maillet Valentine,
Darin Fisher,
David Baron,
David Bruant,
David Flanagan,
David Håsäther,
David Hyatt,
Deepak Sherveghar,
Dethe Elza,
Dimitri Glazkov,
Domenic Denicola,
Dominic Cooney,
Dominique Hazaël-Massieux,
Don Jordan,
Doug Schepers,
Edgar Chen,
Elisée Maurer,
Elliott Sprehn,
Emilio Cobos Álvarez,
Eric Bidelman,
Erik Arvidsson,
Evgeny Kapun,
François Daoust,
François Remy,
Gary Kacmarcik,
Gavin Nicol,
Giorgio Liscio,
Glen Huang,
Glenn Adams,
Glenn Maynard,
Hajime Morrita,
Harald Alvestrand,
Hayato Ito,
Henri Sivonen,
Hongchan Choi,
Hunan Rostomyan,
Ian Hickson,
Igor Bukanov,
Jacob Rossi,
Jake Archibald,
Jake Verbaten,
James Graham,
James Greene,
James M Snell,
James Robinson,
Jayson Chen,
Jeffrey Yasskin,
Jens Lindström,
Jeremy Davis,
Jesse McCarthy,
Jinho Bang,
João Eiras,
Joe Kesselman,
John Atkins,
John Dai,
Jonas Sicking,
Jonathan Kingston,
Jonathan Robie,
Joris van der Wel,
Joshua Bell,
J. S. Choi,
Jungkee Song,
Justin Summerlin,
Kagami Sascha Rosylight,
呂康豪 (Kang-Hao Lu),
田村健人 (Kent TAMURA),
Kevin J. Sung,
Kevin Sweeney,
Kirill Topolyan,
Koji Ishii,
Lachlan Hunt,
Lauren Wood,
Luca Casonato,
Luke Zielinski,
Magne Andersson,
Majid Valipour,
Malte Ubl,
Manish Goregaokar,
Manish Tripathi,
Marcos Caceres,
Mark Miller,
Martijn van der Ven,
Mason Freed,
Mats Palmgren,
Mounir Lamouri,
Michael Stramel,
Michael™ Smith,
Mike Champion,
Mike Taylor,
Mike West,
Nicolás Peña Moreno,
Nidhi Jaju,
Ojan Vafai,
Oliver Nightingale,
Olli Pettay,
Ondřej Žára,
Peter Sharpe,
Philip Jägenstedt,
Philippe Le Hégaret,
Piers Wombwell,
Pierre-Marie Dartus,
prosody—Gab Vereable Context(,
Rafael Weinstein,
Rakina Zata Amni,
Richard Bradshaw,
Rick Byers,
Rick Waldron,
Robbert Broersma,
Robin Berjon,
Roland Steiner,
Rune
F.
Halvorsen,
Russell Bicknell,
Ruud Steltenpool,
Ryosuke Niwa,
Sam Dutton,
Sam Sneddon,
Samuel Giles,
Sanket Joshi,
Scott Haseley,
Sebastian Mayr,
Seo Sanghyeon,
Sergey G. Grekhov,
Shiki Okasaka,
Shinya Kawanaka,
Simon Pieters,
Simon Wülker,
Stef Busking,
Steve Byrne,
Steven Obiajulu,
Stig Halvorsen,
Tab Atkins,
Takashi Sakamoto,
Takayoshi Kochi,
Theresa O’Connor,
Theodore Dubois,
timeless
Timo Tijhof,
Tobie Langel,
Tom Pixley,
Travis Leithead,
Trevor Rowbotham,
triple-underscore
Tristan Fraipont,
Veli Şenol,
Vidur Apparao,
Warren He,
Xidorn Quan,
Yash Handa,
Yehuda Katz,
Yoav Weiss,
Yoichi Osato,
Yoshinori Sano,
Yu Han,
Yusuke Abe, and
Zack Weinberg
for being awesome!
This standard is written by
Anne van Kesteren
Apple
annevk@annevk.nl
with substantial contributions from Aryeh Gregor (
ayg@aryeh.name
and Ms2ger (
ms2ger@gmail.com
).
Intellectual property rights
Part of the revision history of the integration points related to
custom
elements can be found in
the w3c/webcomponents repository
, which is
available under the
W3C Software and Document License
Copyright © WHATWG (Apple, Google, Mozilla, Microsoft). This work is licensed under a
Creative Commons Attribution 4.0
International License
. To the extent portions of it are incorporated into source code, such
portions in the source code are licensed under the
BSD 3-Clause License
instead.
This is the Living Standard. Those
interested in the patent-review version should view the
Living Standard Review Draft
Index
Terms defined by this specification
abort
, in § 3.2
abort()
method for AbortController
, in § 3.1
method for AbortSignal
, in § 3.2
abort algorithms
, in § 3.2
AbortController
, in § 3.1
AbortController()
, in § 3.1
aborted
attribute for AbortSignal
, in § 3.2
dfn for AbortSignal
, in § 3.2
abort reason
, in § 3.2
abort(reason)
method for AbortController
, in § 3.1
method for AbortSignal
, in § 3.2
AbortSignal
, in § 3.2
AbstractRange
, in § 5.3
acceptNode(node)
, in § 6.3
activation behavior
, in § 2.7
add
, in § 3.2
add()
, in § 7.1
add an event listener
, in § 2.7
addedNodes
, in § 4.3.3
AddEventListenerOptions
, in § 2.7
addEventListener(type, callback)
, in § 2.7
addEventListener(type, callback, options)
, in § 2.7
add(...tokens)
, in § 7.1
add(tokens)
, in § 7.1
adopt
, in § 4.5
adopting steps
, in § 4.5
adoptNode(node)
, in § 4.5
after
, in § 5.2
after()
, in § 4.2.8
after(...nodes)
, in § 4.2.8
allow declarative shadow roots
, in § 4.5
ancestor
, in § 1.1
any(signals)
, in § 3.2
ANY_TYPE
, in § 8.1
ANY_UNORDERED_NODE_TYPE
, in § 8.1
append
, in § 4.2.3
append()
, in § 4.2.6
append an attribute
, in § 4.9
appendChild(node)
, in § 4.4
appendData(data)
, in § 4.10
append(...nodes)
, in § 4.2.6
append to an event path
, in § 2.9
assign a slot
, in § 4.2.2.4
assigned
, in § 4.2.2.2
assigned nodes
, in § 4.2.2.1
assigned slot
, in § 4.2.2.2
assignedSlot
, in § 4.2.9
assign slottables
, in § 4.2.2.4
assign slottables for a tree
, in § 4.2.2.4
attach a shadow root
, in § 4.9
attachShadow(init)
, in § 4.9
AT_TARGET
, in § 2.2
Attr
, in § 4.9.2
attribute
, in § 4.9.2
attribute change steps
, in § 4.9
attributeFilter
, in § 4.3.1
attribute list
dfn for Element
, in § 4.9
dfn for NamedNodeMap
, in § 4.9.1
attribute name
, in § 7.1
attributeName
, in § 4.3.3
attributeNamespace
, in § 4.3.3
ATTRIBUTE_NODE
, in § 4.4
attributeOldValue
, in § 4.3.1
attributes
attribute for Element
, in § 4.9
dict-member for MutationObserverInit
, in § 4.3.1
available to element internals
, in § 4.8
baseURI
, in § 4.4
before
, in § 5.2
before()
, in § 4.2.8
before(...nodes)
, in § 4.2.8
BOOLEAN_TYPE
, in § 8.1
booleanValue
, in § 8.1
boundary point
, in § 5.2
bubbles
attribute for Event
, in § 2.2
dict-member for EventInit
, in § 2.2
BUBBLING_PHASE
, in § 2.2
callback
dfn for MutationObserver
, in § 4.3.1
dfn for event listener
, in § 2.7
cancelable
attribute for Event
, in § 2.2
dict-member for EventInit
, in § 2.2
cancelBubble
, in § 2.2
canceled flag
, in § 2.2
capture
dfn for event listener
, in § 2.7
dict-member for EventListenerOptions
, in § 2.7
CAPTURING_PHASE
, in § 2.2
CDATASection
, in § 4.12
CDATA_SECTION_NODE
, in § 4.4
change an attribute
, in § 4.9
CharacterData
, in § 4.10
characterData
, in § 4.3.1
characterDataOldValue
, in § 4.3.1
characterSet
, in § 4.5
charset
, in § 4.5
child
, in § 1.1
childElementCount
, in § 4.2.6
childList
, in § 4.3.1
ChildNode
, in § 4.2.8
childNodes
, in § 4.4
children
attribute for ParentNode
, in § 4.2.6
dfn for tree
, in § 1.1
children changed steps
, in § 4.2.3
child text content
, in § 4.11
class
, in § 4.9
classList
, in § 4.9
className
, in § 4.9
clearParameters()
, in § 9.1
clonable
attribute for ShadowRoot
, in § 4.8
dfn for ShadowRoot
, in § 4.8
dict-member for ShadowRootInit
, in § 4.9
clone a node
, in § 4.4
clone a single node
, in § 4.4
cloneContents()
, in § 5.5
cloneNode()
, in § 4.4
cloneNode(subtree)
, in § 4.4
cloneRange()
, in § 5.5
clone the contents
, in § 5.5
cloning steps
, in § 4.4
cloning the contents
, in § 5.5
"closed"
, in § 4.8
closed-shadow-hidden
, in § 4.8
closest(selectors)
, in § 4.9
collapse()
, in § 5.5
collapsed
attribute for AbstractRange
, in § 5.3
dfn for range
, in § 5.3
collapse(toStart)
, in § 5.5
collection
, in § 4.2.10
Comment
, in § 4.14
Comment()
, in § 4.14
Comment(data)
, in § 4.14
COMMENT_NODE
, in § 4.4
commonAncestorContainer
, in § 5.5
compareBoundaryPoints(how, sourceRange)
, in § 5.5
compareDocumentPosition(other)
, in § 4.4
comparePoint(node, offset)
, in § 5.5
compatMode
, in § 4.5
composed
attribute for Event
, in § 2.2
dict-member for EventInit
, in § 2.2
dict-member for GetRootNodeOptions
, in § 4.4
composed flag
, in § 2.2
composedPath()
, in § 2.2
connected
, in § 4.2.2
constructor
, in § 2.5
constructor()
constructor for AbortController
, in § 3.1
constructor for Comment
, in § 4.14
constructor for Document
, in § 4.5
constructor for DocumentFragment
, in § 4.7
constructor for EventTarget
, in § 2.7
constructor for Range
, in § 5.5
constructor for Text
, in § 4.11
constructor for XPathEvaluator
, in § 8.4
constructor for XSLTProcessor
, in § 9.1
constructor(callback)
, in § 4.3.1
constructor(data)
constructor for Comment
, in § 4.14
constructor for Text
, in § 4.11
constructor(init)
, in § 5.4
constructor(type)
constructor for CustomEvent
, in § 2.4
constructor for Event
, in § 2.2
constructor(type, eventInitDict)
constructor for CustomEvent
, in § 2.4
constructor for Event
, in § 2.2
contained
, in § 5.5
contains(other)
, in § 4.4
contains(token)
, in § 7.1
content type
, in § 4.5
contentType
, in § 4.5
contiguous exclusive Text nodes
, in § 4.11
contiguous Text nodes
, in § 4.11
convert nodes into a node
, in § 4.2.6
create a dependent abort signal
, in § 3.2
create an element
, in § 4.9
create an element internal
, in § 4.9
create an event
, in § 2.5
createAttribute(localName)
, in § 4.5
createAttributeNS(namespace, qualifiedName)
, in § 4.5
createCDATASection(data)
, in § 4.5
createComment(data)
, in § 4.5
createDocumentFragment()
, in § 4.5
createDocument(namespace, qualifiedName)
, in § 4.5.1
createDocument(namespace, qualifiedName, doctype)
, in § 4.5.1
createDocumentType(name, publicId, systemId)
, in § 4.5.1
createElement(localName)
, in § 4.5
createElement(localName, options)
, in § 4.5
createElementNS(namespace, qualifiedName)
, in § 4.5
createElementNS(namespace, qualifiedName, options)
, in § 4.5
createEntityReference()
, in § 11
createEvent(interface)
, in § 4.5
createExpression(expression)
, in § 8.3
createExpression(expression, resolver)
, in § 8.3
createHTMLDocument()
, in § 4.5.1
createHTMLDocument(title)
, in § 4.5.1
createNodeIterator(root)
, in § 4.5
createNodeIterator(root, whatToShow)
, in § 4.5
createNodeIterator(root, whatToShow, filter)
, in § 4.5
createNSResolver(nodeResolver)
, in § 8.3
createProcessingInstruction(target, data)
, in § 4.5
createRange()
, in § 4.5
createTextNode(data)
, in § 4.5
createTreeWalker(root)
, in § 4.5
createTreeWalker(root, whatToShow)
, in § 4.5
createTreeWalker(root, whatToShow, filter)
, in § 4.5
creating an event
, in § 2.5
current
, in § 6.2
current event
, in § 2.3
currentNode
, in § 6.2
currentTarget
, in § 2.2
custom
, in § 4.9
custom element definition
, in § 4.9
custom element registry
dfn for Document
, in § 4.5
dfn for Element
, in § 4.9
dfn for ShadowRoot
, in § 4.8
customElementRegistry
attribute for DocumentOrShadowRoot
, in § 4.2.5
attribute for Element
, in § 4.9
dict-member for ElementCreationOptions
, in § 4.5
dict-member for ImportNodeOptions
, in § 4.5
dict-member for ShadowRootInit
, in § 4.9
custom element state
, in § 4.9
CustomEvent
, in § 2.4
CustomEventInit
, in § 2.4
CustomEvent(type)
, in § 2.4
CustomEvent(type, eventInitDict)
, in § 2.4
data
attribute for CharacterData
, in § 4.10
dfn for CharacterData
, in § 4.10
declarative
, in § 4.8
default passive value
, in § 2.7
defaultPrevented
, in § 2.2
defined
, in § 4.9
delegates focus
, in § 4.8
delegatesFocus
attribute for ShadowRoot
, in § 4.8
dict-member for ShadowRootInit
, in § 4.9
deleteContents()
, in § 5.5
deleteData(offset, count)
, in § 4.10
dependent
, in § 3.2
dependent signals
, in § 3.2
descendant
, in § 1.1
descendant text content
, in § 4.11
detach()
method for NodeIterator
, in § 6.1
method for Range
, in § 5.5
detail
attribute for CustomEvent
, in § 2.4
dict-member for CustomEventInit
, in § 2.4
disconnect()
, in § 4.3.1
dispatch
, in § 2.9
dispatchEvent(event)
, in § 2.7
dispatch flag
, in § 2.2
doctype
attribute for Document
, in § 4.5
definition of
, in § 4.6
Document
, in § 4.5
document
definition of
, in § 4.5
dfn for clone a node
, in § 4.4
Document()
, in § 4.5
document element
, in § 4.2.1
documentElement
, in § 4.5
DocumentFragment
, in § 4.7
DocumentFragment()
, in § 4.7
DOCUMENT_FRAGMENT_NODE
, in § 4.4
DOCUMENT_NODE
, in § 4.4
DocumentOrShadowRoot
, in § 4.2.5
DOCUMENT_POSITION_CONTAINED_BY
, in § 4.4
DOCUMENT_POSITION_CONTAINS
, in § 4.4
DOCUMENT_POSITION_DISCONNECTED
, in § 4.4
DOCUMENT_POSITION_FOLLOWING
, in § 4.4
DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC
, in § 4.4
DOCUMENT_POSITION_PRECEDING
, in § 4.4
document tree
, in § 4.2.1
DocumentType
, in § 4.6
DOCUMENT_TYPE_NODE
, in § 4.4
documentURI
, in § 4.5
domConfig
, in § 11
DOMConfiguration
, in § 11
DOMError
, in § 11
DOMErrorHandler
, in § 11
DOMImplementation
, in § 4.5.1
DOMImplementationList
, in § 11
DOMImplementationSource
, in § 11
DOMLocator
, in § 11
DOMObject
, in § 11
DOMTokenList
, in § 7.1
DOMUserData
, in § 11
effective global custom element registry
, in § 4.5
Element
, in § 4.9
element
definition of
, in § 4.9
dfn for Attr
, in § 4.9.2
dfn for DOMTokenList
, in § 7.1
dfn for NamedNodeMap
, in § 4.9.1
ElementCreationOptions
, in § 4.5
element interface
, in § 4.5
ELEMENT_NODE
, in § 4.4
empty
, in § 4.2
encoding
, in § 4.5
end
, in § 5.3
endContainer
attribute for AbstractRange
, in § 5.3
dict-member for StaticRangeInit
, in § 5.4
end node
, in § 5.3
end offset
, in § 5.3
endOffset
attribute for AbstractRange
, in § 5.3
dict-member for StaticRangeInit
, in § 5.4
END_TO_END
, in § 5.5
END_TO_START
, in § 5.5
ensure pre-insert validity
, in § 4.2.3
entities
, in § 11
Entity
, in § 11
ENTITY_NODE
, in § 4.4
EntityReference
, in § 11
ENTITY_REFERENCE_NODE
, in § 4.4
equal
, in § 5.2
equals
, in § 4.4
evaluate(contextNode)
, in § 8.2
evaluate(contextNode, type)
, in § 8.2
evaluate(contextNode, type, result)
, in § 8.2
evaluate(expression, contextNode)
, in § 8.3
evaluate(expression, contextNode, resolver)
, in § 8.3
evaluate(expression, contextNode, resolver, type)
, in § 8.3
evaluate(expression, contextNode, resolver, type, result)
, in § 8.3
Event
, in § 2.2
event
attribute for Window
, in § 2.3
definition of
, in § 2.2
event constructing steps
, in § 2.5
EventInit
, in § 2.2
event listener
, in § 2.7
EventListener
, in § 2.7
event listener list
, in § 2.7
EventListenerOptions
, in § 2.7
eventPhase
, in § 2.2
EventTarget
, in § 2.7
EventTarget()
, in § 2.7
Event(type)
, in § 2.2
Event(type, eventInitDict)
, in § 2.2
exclusive Text node
, in § 4.11
expandEntityReferences
attribute for NodeIterator
, in § 11
attribute for TreeWalker
, in § 11
extract
, in § 5.5
extractContents()
, in § 5.5
fallbackRegistry
, in § 4.4
filter
attribute for NodeIterator
, in § 6.1
attribute for TreeWalker
, in § 6.2
definition of
, in § 6
dfn for traversal
, in § 6
FILTER_ACCEPT
, in § 6.3
FILTER_REJECT
, in § 6.3
FILTER_SKIP
, in § 6.3
find a slot
, in § 4.2.2.3
find flattened slottables
, in § 4.2.2.3
find slottables
, in § 4.2.2.3
fire an event
, in § 2.10
first child
, in § 1.1
firstChild
, in § 4.4
firstChild()
, in § 6.2
firstElementChild
, in § 4.2.6
FIRST_ORDERED_NODE_TYPE
, in § 8.1
flatten
, in § 2.7
flatten element creation options
, in § 4.5
flatten more
, in § 2.7
following
, in § 1.1
get an attribute by name
, in § 4.9
get an attribute by namespace and local name
, in § 4.9
get an attribute value
, in § 4.9
getAttributeNames()
, in § 4.9
getAttributeNodeNS(namespace, localName)
, in § 4.9
getAttributeNode(qualifiedName)
, in § 4.9
getAttributeNS(namespace, localName)
, in § 4.9
getAttribute(qualifiedName)
, in § 4.9
getElementById(elementId)
, in § 4.2.4
getElementsByClassName(classNames)
method for Document
, in § 4.5
method for Element
, in § 4.9
getElementsByTagNameNS(namespace, localName)
method for Document
, in § 4.5
method for Element
, in § 4.9
getElementsByTagName(qualifiedName)
method for Document
, in § 4.5
method for Element
, in § 4.9
getFeature()
method for DOMImplementation
, in § 11
method for Node
, in § 11
getNamedItemNS(namespace, localName)
, in § 4.9.1
getNamedItem(qualifiedName)
, in § 4.9.1
getParameter(namespaceURI, localName)
, in § 9.1
getRootNode()
, in § 4.4
getRootNode(options)
, in § 4.4
GetRootNodeOptions
, in § 4.4
get text content
, in § 4.4
get the parent
, in § 2.7
getUserData()
, in § 11
handle attribute changes
, in § 4.9
handleEvent(event)
, in § 2.7
has an attribute
, in § 4.9
hasAttributeNS(namespace, localName)
, in § 4.9
hasAttribute(qualifiedName)
, in § 4.9
hasAttributes()
, in § 4.9
hasChildNodes()
, in § 4.4
hasFeature()
, in § 4.5.1
host
attribute for ShadowRoot
, in § 4.8
dfn for DocumentFragment
, in § 4.7
host-including inclusive ancestor
, in § 4.7
HTMLCollection
, in § 4.2.10.2
HTML document
, in § 4.5
HTML-uppercased qualified name
, in § 4.9
ID
, in § 4.9
id
, in § 4.9
implementation
, in § 4.5
importNode(node)
, in § 4.5
importNode(node, options)
, in § 4.5
ImportNodeOptions
, in § 4.5
importStylesheet(style)
, in § 9.1
in a document
, in § 4.2.1
in a document tree
, in § 4.2.1
inclusive ancestor
, in § 1.1
inclusive descendant
, in § 1.1
inclusive sibling
, in § 1.1
index
, in § 1.1
initCustomEvent(type)
, in § 2.4
initCustomEvent(type, bubbles)
, in § 2.4
initCustomEvent(type, bubbles, cancelable)
, in § 2.4
initCustomEvent(type, bubbles, cancelable, detail)
, in § 2.4
initEvent(type)
, in § 2.2
initEvent(type, bubbles)
, in § 2.2
initEvent(type, bubbles, cancelable)
, in § 2.2
initialize
, in § 2.2
initialized flag
, in § 2.2
inner event creation steps
, in § 2.5
inner invoke
, in § 2.9
in passive listener flag
, in § 2.2
inputEncoding
, in § 4.5
insert
definition of
, in § 4.2.3
dfn for live range
, in § 5.5
insert adjacent
, in § 4.9
insertAdjacentElement(where, element)
, in § 4.9
insertAdjacentText(where, data)
, in § 4.9
insertBefore(node, child)
, in § 4.4
insertData(offset, data)
, in § 4.10
insertion steps
, in § 4.2.3
insertNode(node)
, in § 5.5
internal createElementNS steps
, in § 4.5
internalSubset
, in § 11
intersectsNode(node)
, in § 5.5
invalidIteratorState
, in § 8.1
invocation target
, in § 2.2
invocation-target-in-shadow-tree
, in § 2.2
invoke
, in § 2.9
is
, in § 4.5
is active
, in § 6
is a global custom element registry
, in § 4.5
isConnected
, in § 4.4
isDefaultNamespace(namespace)
, in § 4.4
isElementContentWhitespace
, in § 11
isEqualNode(otherNode)
, in § 4.4
isId
, in § 11
isPointInRange(node, offset)
, in § 5.5
isSameNode(otherNode)
, in § 4.4
isSupported
, in § 11
isTrusted
, in § 2.2
is value
, in § 4.9
item(index)
method for DOMTokenList
, in § 7.1
method for HTMLCollection
, in § 4.2.10.2
method for NamedNodeMap
, in § 4.9.1
method for NodeList
, in § 4.2.10.1
iterateNext()
, in § 8.1
iterator collection
, in § 6.1
keep custom element registry null
, in § 4.8
last child
, in § 1.1
lastChild
, in § 4.4
lastChild()
, in § 6.2
lastElementChild
, in § 4.2.6
legacy-canceled-activation behavior
, in § 2.7
legacy-obtain service worker fetch event listener callbacks
, in § 2.8
legacy-pre-activation behavior
, in § 2.7
length
attribute for CharacterData
, in § 4.10
attribute for DOMTokenList
, in § 7.1
attribute for HTMLCollection
, in § 4.2.10.2
attribute for NamedNodeMap
, in § 4.9.1
attribute for NodeList
, in § 4.2.10.1
dfn for Node
, in § 4.2
light tree
, in § 4.2.2
limited-quirks mode
, in § 4.5
list of elements with class names classNames
, in § 4.4
list of elements with namespace namespace and local name localName
, in § 4.4
list of elements with qualified name qualifiedName
, in § 4.4
live
, in § 4.2.10
live collection
, in § 4.2.10
live range pre-remove steps
, in § 5.5
live ranges
, in § 5.5
local name
dfn for Attr
, in § 4.9.2
dfn for Element
, in § 4.9
localName
attribute for Attr
, in § 4.9.2
attribute for Element
, in § 4.9
locate a namespace
, in § 4.4
locate a namespace prefix
, in § 4.4
locating a namespace prefix
, in § 4.4
lookupNamespaceURI(prefix)
method for Node
, in § 4.4
method for XPathNSResolver
, in § 8.3
lookupPrefix(namespace)
, in § 4.4
"manual"
, in § 4.8
manual slot assignment
, in § 4.2.2.2
matches(selectors)
, in § 4.9
mode
attribute for ShadowRoot
, in § 4.8
dfn for Document
, in § 4.5
dfn for ShadowRoot
, in § 4.8
dict-member for ShadowRootInit
, in § 4.9
move
, in § 4.2.3
moveBefore(node, child)
, in § 4.2.6
moving steps
, in § 4.2.3
MutationCallback
, in § 4.3.1
MutationEvent
, in § 11
MutationNameEvent
, in § 11
MutationObserver
, in § 4.3.1
MutationObserver(callback)
, in § 4.3.1
MutationObserverInit
, in § 4.3.1
mutation observer microtask queued
, in § 4.3
MutationRecord
, in § 4.3.3
name
attribute for Attr
, in § 4.9.2
attribute for DocumentType
, in § 4.6
dfn for DocumentType
, in § 4.6
dfn for slot
, in § 4.2.2.1
dfn for slottable
, in § 4.2.2.2
"named"
, in § 4.8
named attribute
, in § 4.9.2
namedItem(key)
, in § 4.2.10.2
namedItem(name)
, in § 4.2.10.2
NamedNodeMap
, in § 4.9.1
NameList
, in § 11
namespace
dfn for Attr
, in § 4.9.2
dfn for Element
, in § 4.9
namespace prefix
dfn for Attr
, in § 4.9.2
dfn for Element
, in § 4.9
namespaceURI
attribute for Attr
, in § 4.9.2
attribute for Element
, in § 4.9
nextElementSibling
, in § 4.2.7
nextNode()
method for NodeIterator
, in § 6.1
method for TreeWalker
, in § 6.2
next sibling
, in § 1.1
nextSibling
attribute for MutationRecord
, in § 4.3.3
attribute for Node
, in § 4.4
nextSibling()
, in § 6.2
Node
, in § 4.4
node
, in § 5.2
node document
, in § 4.4
NodeFilter
, in § 6.3
NodeIterator
, in § 6.1
NodeIterator pre-remove steps
, in § 6.1
node list
, in § 4.3.1
NodeList
, in § 4.2.10.1
nodeName
, in § 4.4
Nodes
, in § 4.2
node tree
, in § 4.2
nodeType
, in § 4.4
nodeValue
, in § 4.4
NonDocumentTypeChildNode
, in § 4.2.7
NONE
, in § 2.2
NonElementParentNode
, in § 4.2.4
no-quirks mode
, in § 4.5
normalize()
, in § 4.4
normalizeDocument()
, in § 11
Notation
, in § 11
NOTATION_NODE
, in § 4.4
notations
, in § 11
notify mutation observers
, in § 4.3
NUMBER_TYPE
, in § 8.1
numberValue
, in § 8.1
observer
, in § 4.3
observe(target)
, in § 4.3.1
observe(target, options)
, in § 4.3.1
offset
, in § 5.2
oldValue
, in § 4.3.3
onabort
attribute for AbortSignal
, in § 3.2
dfn for AbortSignal
, in § 3.2
once
dfn for event listener
, in § 2.7
dict-member for AddEventListenerOptions
, in § 2.7
onslotchange
attribute for ShadowRoot
, in § 4.8
dfn for ShadowRoot
, in § 4.8
"open"
, in § 4.8
options
, in § 4.3
ORDERED_NODE_ITERATOR_TYPE
, in § 8.1
ORDERED_NODE_SNAPSHOT_TYPE
, in § 8.1
ordered set parser
, in § 1.2
ordered set serializer
, in § 1.2
origin
, in § 4.5
other applicable specifications
, in § 1
ownerDocument
, in § 4.4
ownerElement
, in § 4.9.2
parent
dfn for clone a node
, in § 4.4
dfn for tree
, in § 1.1
parent element
, in § 4.9
parentElement
, in § 4.4
ParentNode
, in § 4.2.6
parentNode
, in § 4.4
parentNode()
, in § 6.2
partially contained
, in § 5.5
participate
, in § 1.1
participate in a tree
, in § 1.1
participates in a tree
, in § 1.1
passive
dfn for event listener
, in § 2.7
dict-member for AddEventListenerOptions
, in § 2.7
path
, in § 2.2
pending mutation observers
, in § 4.3
pointer before reference
, in § 6.1
pointerBeforeReferenceNode
, in § 6.1
position
, in § 5.2
post-connection steps
, in § 4.2.3
potential event target
, in § 2.2
preceding
, in § 1.1
prefix
attribute for Attr
, in § 4.9.2
attribute for Element
, in § 4.9
pre-insert
, in § 4.2.3
prepend()
, in § 4.2.6
prepend(...nodes)
, in § 4.2.6
pre-remove
, in § 4.2.3
preventDefault()
, in § 2.2
previousElementSibling
, in § 4.2.7
previousNode()
method for NodeIterator
, in § 6.1
method for TreeWalker
, in § 6.2
previous sibling
, in § 1.1
previousSibling
attribute for MutationRecord
, in § 4.3.3
attribute for Node
, in § 4.4
previousSibling()
, in § 6.2
ProcessingInstruction
, in § 4.13
PROCESSING_INSTRUCTION_NODE
, in § 4.4
public ID
, in § 4.6
publicId
, in § 4.6
qualified name
dfn for Attr
, in § 4.9.2
dfn for Element
, in § 4.9
querySelectorAll(selectors)
, in § 4.2.6
querySelector(selectors)
, in § 4.2.6
queue a mutation observer microtask
, in § 4.3
queue a mutation record
, in § 4.3.2
queue a tree mutation record
, in § 4.3.2
quirks mode
, in § 4.5
Range
, in § 5.5
range
, in § 5.3
Range()
, in § 5.5
RangeException
, in § 11
reason
, in § 3.2
record queue
, in § 4.3.1
reference
, in § 6.1
referenceNode
, in § 6.1
reflect
, in § 4.9
registered observer
, in § 4.3
registered observer list
, in § 4.3
relatedTarget
dfn for Event
, in § 2.2
dfn for Event/path
, in § 2.2
remove
definition of
, in § 4.2.3
dfn for AbortSignal
, in § 3.2
remove()
method for ChildNode
, in § 4.2.8
method for DOMTokenList
, in § 7.1
remove all event listeners
, in § 2.7
remove an attribute
, in § 4.9
remove an attribute by name
, in § 4.9
remove an attribute by namespace and local name
, in § 4.9
remove an event listener
, in § 2.7
removeAttributeNode(attr)
, in § 4.9
removeAttributeNS(namespace, localName)
, in § 4.9
removeAttribute(qualifiedName)
, in § 4.9
removeChild(child)
, in § 4.4
removed
, in § 2.7
removedNodes
, in § 4.3.3
removeEventListener(type, callback)
, in § 2.7
removeEventListener(type, callback, options)
, in § 2.7
removeNamedItemNS(namespace, localName)
, in § 4.9.1
removeNamedItem(qualifiedName)
, in § 4.9.1
removeParameter(namespaceURI, localName)
, in § 9.1
remove(...tokens)
, in § 7.1
remove(tokens)
, in § 7.1
removing steps
, in § 4.2.3
renameNode()
, in § 11
replace
, in § 4.2.3
replace all
, in § 4.2.3
replace an attribute
, in § 4.9
replaceChild(node, child)
, in § 4.4
replaceChildren()
, in § 4.2.6
replaceChildren(...nodes)
, in § 4.2.6
replace data
, in § 4.10
replaceData(offset, count, data)
, in § 4.10
replace(token, newToken)
, in § 7.1
replaceWholeText()
, in § 11
replaceWith()
, in § 4.2.8
replaceWith(...nodes)
, in § 4.2.8
represented by the collection
, in § 4.2.10
reset()
, in § 9.1
resultType
, in § 8.1
retarget
, in § 4.8
retargeting
, in § 4.8
returnValue
, in § 2.2
root
attribute for NodeIterator
, in § 6.1
attribute for TreeWalker
, in § 6.2
dfn for live range
, in § 5.5
dfn for traversal
, in § 6
dfn for tree
, in § 1.1
root-of-closed-tree
, in § 2.2
run the abort steps
, in § 3.2
schemaTypeInfo
attribute for Attr
, in § 11
attribute for Element
, in § 11
scope-match a selectors string
, in § 1.3
select
, in § 5.5
selectNodeContents(node)
, in § 5.5
selectNode(node)
, in § 5.5
selfOnly
, in § 4.5
serializable
attribute for ShadowRoot
, in § 4.8
dfn for ShadowRoot
, in § 4.8
dict-member for ShadowRootInit
, in § 4.9
serialize steps
, in § 7.1
set an attribute
, in § 4.9
set an attribute value
, in § 4.9
set an existing attribute value
, in § 4.9.2
setAttributeNode(attr)
, in § 4.9
setAttributeNodeNS(attr)
, in § 4.9
setAttributeNS(namespace, qualifiedName, value)
, in § 4.9
setAttribute(qualifiedName, value)
, in § 4.9
setEndAfter(node)
, in § 5.5
setEndBefore(node)
, in § 5.5
setEnd(node, offset)
, in § 5.5
setIdAttribute()
, in § 11
setIdAttributeNode()
, in § 11
setIdAttributeNS()
, in § 11
setNamedItem(attr)
, in § 4.9.1
setNamedItemNS(attr)
, in § 4.9.1
setParameter(namespaceURI, localName, value)
, in § 9.1
setStartAfter(node)
, in § 5.5
setStartBefore(node)
, in § 5.5
setStart(node, offset)
, in § 5.5
set text content
, in § 4.4
set the canceled flag
, in § 2.2
set the end
, in § 5.5
set the start
, in § 5.5
setUserData()
, in § 11
shadow-adjusted target
, in § 2.2
shadow host
, in § 4.9
shadow-including ancestor
, in § 4.8
shadow-including descendant
, in § 4.8
shadow-including inclusive ancestor
, in § 4.8
shadow-including inclusive descendant
, in § 4.8
Shadow-including preorder, depth-first traversal
, in § 4.8
shadow-including root
, in § 4.8
shadow-including tree order
, in § 4.8
shadow root
definition of
, in § 4.8
dfn for Element
, in § 4.9
ShadowRoot
, in § 4.8
shadowRoot
, in § 4.9
ShadowRootInit
, in § 4.9
ShadowRootMode
, in § 4.8
shadow tree
, in § 4.2.2
SHOW_ALL
, in § 6.3
SHOW_ATTRIBUTE
, in § 6.3
SHOW_CDATA_SECTION
, in § 6.3
SHOW_COMMENT
, in § 6.3
SHOW_DOCUMENT
, in § 6.3
SHOW_DOCUMENT_FRAGMENT
, in § 6.3
SHOW_DOCUMENT_TYPE
, in § 6.3
SHOW_ELEMENT
, in § 6.3
SHOW_ENTITY
, in § 6.3
SHOW_ENTITY_REFERENCE
, in § 6.3
SHOW_NOTATION
, in § 6.3
SHOW_PROCESSING_INSTRUCTION
, in § 6.3
SHOW_TEXT
, in § 6.3
sibling
, in § 1.1
signal
attribute for AbortController
, in § 3.1
dfn for AbortController
, in § 3.1
dfn for event listener
, in § 2.7
dict-member for AddEventListenerOptions
, in § 2.7
signal abort
dfn for AbortController
, in § 3.1
dfn for AbortSignal
, in § 3.2
signal a slot change
, in § 4.2.2.5
signal slots
, in § 4.2.2.5
singleNodeValue
, in § 8.1
slot
attribute for Element
, in § 4.9
definition of
, in § 4.2.2.1
slot assignment
, in § 4.8
slotAssignment
attribute for ShadowRoot
, in § 4.8
dict-member for ShadowRootInit
, in § 4.9
SlotAssignmentMode
, in § 4.8
slotchange
, in § 4.3
slot-in-closed-tree
, in § 2.2
Slottable
, in § 4.2.9
slottable
, in § 4.2.2.2
snapshotItem(index)
, in § 8.1
snapshotLength
, in § 8.1
source
, in § 4.3
source signals
, in § 3.2
specified
, in § 4.9.2
split a Text node
, in § 4.11
splitText(offset)
, in § 4.11
srcElement
, in § 2.2
start
, in § 5.3
startContainer
attribute for AbstractRange
, in § 5.3
dict-member for StaticRangeInit
, in § 5.4
start node
, in § 5.3
start offset
, in § 5.3
startOffset
attribute for AbstractRange
, in § 5.3
dict-member for StaticRangeInit
, in § 5.4
START_TO_END
, in § 5.5
START_TO_START
, in § 5.5
static collection
, in § 4.2.10
StaticRange
, in § 5.4
StaticRange(init)
, in § 5.4
StaticRangeInit
, in § 5.4
stopImmediatePropagation()
, in § 2.2
stop immediate propagation flag
, in § 2.2
stopPropagation()
, in § 2.2
stop propagation flag
, in § 2.2
strictErrorChecking
, in § 11
stringification behavior
, in § 7.1
stringificationbehavior
, in § 5.5
string replace all
, in § 4.4
STRING_TYPE
, in § 8.1
stringValue
, in § 8.1
substring data
, in § 4.10
substringData(offset, count)
, in § 4.10
subtree
dfn for clone a node
, in § 4.4
dict-member for MutationObserverInit
, in § 4.3.1
supported tokens
, in § 7.1
supports(token)
, in § 7.1
suppressObservers
dfn for insert
, in § 4.2.3
dfn for remove
, in § 4.2.3
surroundContents(newParent)
, in § 5.5
system ID
, in § 4.6
systemId
, in § 4.6
tagName
, in § 4.9
takeRecords()
, in § 4.3.1
target
attribute for Event
, in § 2.2
attribute for MutationRecord
, in § 4.3.3
attribute for ProcessingInstruction
, in § 4.13
dfn for Event
, in § 2.2
dfn for ProcessingInstruction
, in § 4.13
Text
, in § 4.11
Text()
, in § 4.11
textContent
, in § 4.4
Text(data)
, in § 4.11
TEXT_NODE
, in § 4.4
throwIfAborted()
, in § 3.2
timeout(milliseconds)
, in § 3.2
timeStamp
, in § 2.2
toggleAttribute(qualifiedName)
, in § 4.9
toggleAttribute(qualifiedName, force)
, in § 4.9
toggle(token)
, in § 7.1
toggle(token, force)
, in § 7.1
token set
, in § 7.1
touch target list
dfn for Event
, in § 2.2
dfn for Event/path
, in § 2.2
transformToDocument(source)
, in § 9.1
transformToFragment(source, output)
, in § 9.1
transient registered observer
, in § 4.3
traverse
, in § 6.1
traverse children
, in § 6.2
traverse siblings
, in § 6.2
tree
, in § 1.1
tree order
, in § 1.1
TreeWalker
, in § 6.2
type
attribute for Event
, in § 2.2
attribute for MutationRecord
, in § 4.3.3
dfn for Document
, in § 4.5
dfn for event listener
, in § 2.7
TypeInfo
, in § 11
UNORDERED_NODE_ITERATOR_TYPE
, in § 8.1
UNORDERED_NODE_SNAPSHOT_TYPE
, in § 8.1
update steps
, in § 7.1
URL
attribute for Document
, in § 4.5
dfn for Document
, in § 4.5
UserDataHandler
, in § 11
valid
, in § 5.4
validate and extract
, in § 1.4
validation steps
, in § 7.1
valid attribute local name
, in § 1.4
valid doctype name
, in § 1.4
valid element local name
, in § 1.4
valid namespace prefix
, in § 1.4
valid shadow host name
, in § 4.9
value
attribute for Attr
, in § 4.9.2
attribute for DOMTokenList
, in § 7.1
dfn for Attr
, in § 4.9.2
webkitMatchesSelector(selectors)
, in § 4.9
whatToShow
attribute for NodeIterator
, in § 6.1
attribute for TreeWalker
, in § 6.2
dfn for traversal
, in § 6
wholeText
, in § 4.11
XML document
, in § 4.5
XMLDocument
, in § 4.5
xmlEncoding
, in § 11
xmlStandalone
, in § 11
xmlVersion
, in § 11
XPathEvaluator
, in § 8.4
XPathEvaluator()
, in § 8.4
XPathEvaluatorBase
, in § 8.3
XPathExpression
, in § 8.2
XPathNSResolver
, in § 8.3
XPathResult
, in § 8.1
XSLTProcessor
, in § 9.1
XSLTProcessor()
, in § 9.1
Terms defined by reference
[]
defines the following terms:
DeviceMotionEvent
DeviceOrientationEvent
TouchEvent
createContextualFragment()
[CONSOLE]
defines the following terms:
report a warning to the console
[CSSOM-VIEW]
defines the following terms:
getBoundingClientRect()
getClientRects()
[ECMASCRIPT]
defines the following terms:
current realm
realm
surrounding agent
[ENCODING]
defines the following terms:
encoding
name
UTF-8
[HR-TIME-3]
defines the following terms:
DOMHighResTimeStamp
current high resolution time
relative high resolution coarse time
[HTML]
defines the following terms:
BeforeUnloadEvent
CEReactions
CustomElementRegistry
DragEvent
EventHandler
HTMLAnchorElement
HTMLElement
HTMLHtmlElement
HTMLSlotElement
HTMLUnknownElement
HashChangeEvent
MessageEvent
StorageEvent
Window
active custom element constructor map
area
associated Document
browsing context
browsing context
(for Document)
click()
constructor
current global object
custom element constructor
custom element definition
customized built-in element
disable shadow
document base URL
enqueue a custom element callback reaction
enqueue a custom element upgrade reaction
event handler
event handler event type
event handler IDL attribute
global object
head
html
HTML parser
in parallel
input
is scoped
local name
look up a custom element definition
look up a custom element registry
manually assigned nodes
microtask
name
opaque origin
origin
queue a global task
queue a microtask
relevant agent
relevant global object
relevant realm
report an exception
run steps after a timeout
scoped document set
script
similar-origin window agent
slot
style
template
the body element
timer task source
title
try to upgrade an element
upgrade an element
valid custom element name
[INFRA]
defines the following terms:
append
(for list)
append
(for set)
ASCII alpha
ASCII case-insensitive
ASCII digit
ASCII lowercase
ASCII uppercase
ASCII whitespace
assert
break
clone
code point
code unit
concatenation
contain
continue
empty
enqueue
exist
(for list)
exist
(for map)
for each
(for list)
for each
(for map)
HTML namespace
identical to
insert
is empty
is not empty
length
list
map
ordered set
prepend
queue
remove
(for list)
remove
(for map)
replace
(for list)
replace
(for set)
set
set
(for map)
size
split on ASCII whitespace
string
struct
SVG namespace
tuple
XML namespace
XMLNS namespace
[LONG-ANIMATION-FRAMES]
defines the following terms:
record timing info for event listener
[POINTEREVENTS4]
defines the following terms:
MouseEvent
[SELECTORS4]
defines the following terms:
:defined
match a selector against a tree
match a selector against an element
parse a selector
scoping root
[SERVICE-WORKERS]
defines the following terms:
ServiceWorkerGlobalScope
has ever been evaluated flag
script resource
service worker
service worker events
set of event types to handle
[TRUSTED-TYPES]
defines the following terms:
TrustedType
get trusted type compliant attribute value
[UIEVENTS]
defines the following terms:
CompositionEvent
FocusEvent
KeyboardEvent
TextEvent
UIEvent
detail
[URL]
defines the following terms:
URL
URL serializer
[WEBIDL]
defines the following terms:
AbortError
DOMException
DOMString
EnforceRange
Exposed
HierarchyRequestError
InUseAttributeError
IndexSizeError
InvalidCharacterError
InvalidNodeTypeError
InvalidStateError
LegacyNullToEmptyString
LegacyUnenumerableNamedProperties
LegacyUnforgeable
NamespaceError
NewObject
NotFoundError
NotSupportedError
PutForwards
Replaceable
SameObject
SyntaxError
TimeoutError
USVString
Unscopable
WrongDocumentError
a new promise
any
associated realm
boolean
call a user object's operation
callback this value
construct
converted to an IDL value
dictionary
identifier
implements
invoke
new
primary interface
reject
resolve
sequence
short
supported property indices
supported property names
this
throw
undefined
unrestricted double
unsigned long
unsigned long long
unsigned short
[XML]
defines the following terms:
Name
References
Normative References
[CONSOLE]
Dominic Farolino; Robert Kowalski; Terin Stock.
Console Standard
. Living Standard. URL:
[DEVICE-ORIENTATION]
Reilly Grant; Marcos Caceres.
Device Orientation and Motion
. URL:
[ECMASCRIPT]
ECMAScript Language Specification
. URL:
[ENCODING]
Anne van Kesteren.
Encoding Standard
. Living Standard. URL:
[HR-TIME-3]
Yoav Weiss.
High Resolution Time
. URL:
[HTML]
Anne van Kesteren; et al.
HTML Standard
. Living Standard. URL:
[INFRA]
Anne van Kesteren; Domenic Denicola.
Infra Standard
. Living Standard. URL:
[LONG-ANIMATION-FRAMES]
Long Animation Frames API
. Editor's Draft. URL:
[POINTEREVENTS4]
Patrick Lauke; Robert Flack.
Pointer Events
. URL:
[SELECTORS4]
Elika Etemad; Tab Atkins Jr..
Selectors Level 4
. URL:
[SERVICE-WORKERS]
Monica CHINTALA; Yoshisato Yanagisawa.
Service Workers Nightly
. URL:
[TOUCH-EVENTS]
Doug Schepers; et al.
Touch Events
. URL:
[TRUSTED-TYPES]
Krzysztof Kotowicz.
Trusted Types
. URL:
[UIEVENTS]
Xiaoqian Wu.
UI Events
. URL:
[URL]
Anne van Kesteren.
URL Standard
. Living Standard. URL:
[WEBIDL]
Edgar Chen; Timothy Gu.
Web IDL Standard
. Living Standard. URL:
[XML]
Tim Bray; et al.
Extensible Markup Language (XML) 1.0 (Fifth Edition)
. 26 November 2008. REC. URL:
[XML-NAMES]
Tim Bray; et al.
Namespaces in XML 1.0 (Third Edition)
. 8 December 2009. REC. URL:
Informative References
[CSSOM-VIEW]
Simon Fraser; Emilio Cobos Álvarez.
CSSOM View Module
. URL:
[DOM-Level-3-XPath]
Ray Whitmer.
Document Object Model (DOM) Level 3 XPath Specification
. 3 November 2020. NOTE. URL:
[DOM-Parsing]
Travis Leithead.
DOM Parsing and Serialization
. URL:
[FULLSCREEN]
Philip Jägenstedt.
Fullscreen API Standard
. Living Standard. URL:
[INDEXEDDB]
Nikunj Mehta; et al.
Indexed Database API
. URL:
[XPath]
James Clark; Steven DeRose.
XML Path Language (XPath) Version 1.0
. 16 November 1999. REC. URL:
[XSLT]
James Clark.
XSL Transformations (XSLT) Version 1.0
. 16 November 1999. REC. URL:
IDL Index
[Exposed=*]
interface
Event
constructor
DOMString
type
optional
EventInit
eventInitDict
= {});
readonly
attribute
DOMString
type
readonly
attribute
EventTarget
target
readonly
attribute
EventTarget
srcElement
; // legacy
readonly
attribute
EventTarget
currentTarget
sequence
EventTarget
composedPath
();
const
unsigned
short
NONE
= 0;
const
unsigned
short
CAPTURING_PHASE
= 1;
const
unsigned
short
AT_TARGET
= 2;
const
unsigned
short
BUBBLING_PHASE
= 3;
readonly
attribute
unsigned
short
eventPhase
undefined
stopPropagation
();
attribute
boolean
cancelBubble
; // legacy alias of .stopPropagation()
undefined
stopImmediatePropagation
();
readonly
attribute
boolean
bubbles
readonly
attribute
boolean
cancelable
attribute
boolean
returnValue
; // legacy
undefined
preventDefault
();
readonly
attribute
boolean
defaultPrevented
readonly
attribute
boolean
composed

LegacyUnforgeable
readonly
attribute
boolean
isTrusted
readonly
attribute
DOMHighResTimeStamp
timeStamp
undefined
initEvent
DOMString
type
optional
boolean
bubbles
false
optional
boolean
cancelable
false
); // legacy
};
dictionary
EventInit
boolean
bubbles
false
boolean
cancelable
false
boolean
composed
false
};
partial
interface
Window
Replaceable
readonly
attribute
Event
or
undefined
event
; // legacy
};

[Exposed=*]
interface
CustomEvent
Event
constructor
DOMString
type
optional
CustomEventInit
eventInitDict
= {});
readonly
attribute
any
detail
undefined
initCustomEvent
DOMString
type
optional
boolean
bubbles
false
optional
boolean
cancelable
false
optional
any
detail
null
); // legacy
};
dictionary
CustomEventInit
EventInit
any
detail
null
};

[Exposed=*]
interface
EventTarget
constructor
();
undefined
addEventListener
DOMString
type
EventListener
callback
optional
AddEventListenerOptions
or
boolean
options
= {});
undefined
removeEventListener
DOMString
type
EventListener
callback
optional
EventListenerOptions
or
boolean
options
= {});
boolean
dispatchEvent
Event
event
);
};
callback
interface
EventListener
undefined
handleEvent
Event
event
);
};
dictionary
EventListenerOptions
boolean
capture
false
};
dictionary
AddEventListenerOptions
EventListenerOptions
boolean
passive
boolean
once
false
AbortSignal
signal
};

[Exposed=*]
interface
AbortController
constructor
();

SameObject
readonly
attribute
AbortSignal
signal
undefined
abort
optional
any
reason
);
};

[Exposed=*]
interface
AbortSignal
EventTarget
NewObject
static
AbortSignal
abort
optional
any
reason
);
Exposed
=(
Window
Worker
),
NewObject
static
AbortSignal
timeout
([
EnforceRange
unsigned
long
long
milliseconds
);
NewObject
static
AbortSignal
_any
sequence
AbortSignal
signals
);
readonly
attribute
boolean
aborted
readonly
attribute
any
reason
undefined
throwIfAborted
();
attribute
EventHandler
onabort
};
interface
mixin
NonElementParentNode
Element
getElementById
DOMString
elementId
);
};
Document
includes
NonElementParentNode
DocumentFragment
includes
NonElementParentNode
interface
mixin
DocumentOrShadowRoot
readonly
attribute
CustomElementRegistry
customElementRegistry
};
Document
includes
DocumentOrShadowRoot
ShadowRoot
includes
DocumentOrShadowRoot
interface
mixin
ParentNode
SameObject
readonly
attribute
HTMLCollection
children
readonly
attribute
Element
firstElementChild
readonly
attribute
Element
lastElementChild
readonly
attribute
unsigned
long
childElementCount

CEReactions
Unscopable
undefined
prepend
((
Node
or
DOMString
)...
nodes
);
CEReactions
Unscopable
undefined
append
((
Node
or
DOMString
)...
nodes
);
CEReactions
Unscopable
undefined
replaceChildren
((
Node
or
DOMString
)...
nodes
);

CEReactions
undefined
moveBefore
Node
node
Node
child
);
Element
querySelector
DOMString
selectors
);
NewObject
NodeList
querySelectorAll
DOMString
selectors
);
};
Document
includes
ParentNode
DocumentFragment
includes
ParentNode
Element
includes
ParentNode
interface
mixin
NonDocumentTypeChildNode
readonly
attribute
Element
previousElementSibling
readonly
attribute
Element
nextElementSibling
};
Element
includes
NonDocumentTypeChildNode
CharacterData
includes
NonDocumentTypeChildNode
interface
mixin
ChildNode
CEReactions
Unscopable
undefined
before
((
Node
or
DOMString
)...
nodes
);
CEReactions
Unscopable
undefined
after
((
Node
or
DOMString
)...
nodes
);
CEReactions
Unscopable
undefined
replaceWith
((
Node
or
DOMString
)...
nodes
);
CEReactions
Unscopable
undefined
remove
();
};
DocumentType
includes
ChildNode
Element
includes
ChildNode
CharacterData
includes
ChildNode
interface
mixin
Slottable
readonly
attribute
HTMLSlotElement
assignedSlot
};
Element
includes
Slottable
Text
includes
Slottable

Exposed
Window
interface
NodeList
getter
Node
item
unsigned
long
index
);
readonly
attribute
unsigned
long
length
iterable
Node
>;
};

Exposed
Window
LegacyUnenumerableNamedProperties
interface
HTMLCollection
readonly
attribute
unsigned
long
length
getter
Element
item
unsigned
long
index
);
getter
Element
namedItem
DOMString
name
);
};

Exposed
Window
interface
MutationObserver
constructor
MutationCallback
callback
);
undefined
observe
Node
target
optional
MutationObserverInit
options
= {});
undefined
disconnect
();
sequence
MutationRecord
takeRecords
();
};
callback
MutationCallback
undefined
sequence
MutationRecord
mutations
MutationObserver
observer
);
dictionary
MutationObserverInit
boolean
childList
false
boolean
attributes
boolean
characterData
boolean
subtree
false
boolean
attributeOldValue
boolean
characterDataOldValue
sequence
DOMString
attributeFilter
};

Exposed
Window
interface
MutationRecord
readonly
attribute
DOMString
type
SameObject
readonly
attribute
Node
target
SameObject
readonly
attribute
NodeList
addedNodes
SameObject
readonly
attribute
NodeList
removedNodes
readonly
attribute
Node
previousSibling
readonly
attribute
Node
nextSibling
readonly
attribute
DOMString
attributeName
readonly
attribute
DOMString
attributeNamespace
readonly
attribute
DOMString
oldValue
};

Exposed
Window
interface
Node
EventTarget
const
unsigned
short
ELEMENT_NODE
= 1;
const
unsigned
short
ATTRIBUTE_NODE
= 2;
const
unsigned
short
TEXT_NODE
= 3;
const
unsigned
short
CDATA_SECTION_NODE
= 4;
const
unsigned
short
ENTITY_REFERENCE_NODE
= 5; // legacy
const
unsigned
short
ENTITY_NODE
= 6; // legacy
const
unsigned
short
PROCESSING_INSTRUCTION_NODE
= 7;
const
unsigned
short
COMMENT_NODE
= 8;
const
unsigned
short
DOCUMENT_NODE
= 9;
const
unsigned
short
DOCUMENT_TYPE_NODE
= 10;
const
unsigned
short
DOCUMENT_FRAGMENT_NODE
= 11;
const
unsigned
short
NOTATION_NODE
= 12; // legacy
readonly
attribute
unsigned
short
nodeType
readonly
attribute
DOMString
nodeName
readonly
attribute
USVString
baseURI
readonly
attribute
boolean
isConnected
readonly
attribute
Document
ownerDocument
Node
getRootNode
optional
GetRootNodeOptions
options
= {});
readonly
attribute
Node
parentNode
readonly
attribute
Element
parentElement
boolean
hasChildNodes
();
SameObject
readonly
attribute
NodeList
childNodes
readonly
attribute
Node
firstChild
readonly
attribute
Node
lastChild
readonly
attribute
Node
previousSibling
readonly
attribute
Node
nextSibling

CEReactions
attribute
DOMString
nodeValue
CEReactions
attribute
DOMString
textContent
CEReactions
undefined
normalize
();

CEReactions
NewObject
Node
cloneNode
optional
boolean
subtree
false
);
boolean
isEqualNode
Node
otherNode
);
boolean
isSameNode
Node
otherNode
); // legacy alias of ===
const
unsigned
short
DOCUMENT_POSITION_DISCONNECTED
= 0x01;
const
unsigned
short
DOCUMENT_POSITION_PRECEDING
= 0x02;
const
unsigned
short
DOCUMENT_POSITION_FOLLOWING
= 0x04;
const
unsigned
short
DOCUMENT_POSITION_CONTAINS
= 0x08;
const
unsigned
short
DOCUMENT_POSITION_CONTAINED_BY
= 0x10;
const
unsigned
short
DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC
= 0x20;
unsigned
short
compareDocumentPosition
Node
other
);
boolean
contains
Node
other
);
DOMString
lookupPrefix
DOMString
namespace
);
DOMString
lookupNamespaceURI
DOMString
prefix
);
boolean
isDefaultNamespace
DOMString
namespace
);

CEReactions
Node
insertBefore
Node
node
Node
child
);
CEReactions
Node
appendChild
Node
node
);
CEReactions
Node
replaceChild
Node
node
Node
child
);
CEReactions
Node
removeChild
Node
child
);
};
dictionary
GetRootNodeOptions
boolean
composed
false
};

Exposed
Window
interface
Document
Node
constructor
();

SameObject
readonly
attribute
DOMImplementation
implementation
readonly
attribute
USVString
URL
readonly
attribute
USVString
documentURI
readonly
attribute
DOMString
compatMode
readonly
attribute
DOMString
characterSet
readonly
attribute
DOMString
charset
; // legacy alias of .characterSet
readonly
attribute
DOMString
inputEncoding
; // legacy alias of .characterSet
readonly
attribute
DOMString
contentType
readonly
attribute
DocumentType
doctype
readonly
attribute
Element
documentElement
HTMLCollection
getElementsByTagName
DOMString
qualifiedName
);
HTMLCollection
getElementsByTagNameNS
DOMString
namespace
DOMString
localName
);
HTMLCollection
getElementsByClassName
DOMString
classNames
);

CEReactions
NewObject
Element
createElement
DOMString
localName
optional
DOMString
or
ElementCreationOptions
options
= {});
CEReactions
NewObject
Element
createElementNS
DOMString
namespace
DOMString
qualifiedName
optional
DOMString
or
ElementCreationOptions
options
= {});
NewObject
DocumentFragment
createDocumentFragment
();
NewObject
Text
createTextNode
DOMString
data
);
NewObject
CDATASection
createCDATASection
DOMString
data
);
NewObject
Comment
createComment
DOMString
data
);
NewObject
ProcessingInstruction
createProcessingInstruction
DOMString
target
DOMString
data
);

CEReactions
NewObject
Node
importNode
Node
node
optional
boolean
or
ImportNodeOptions
options
false
);
CEReactions
Node
adoptNode
Node
node
);

NewObject
Attr
createAttribute
DOMString
localName
);
NewObject
Attr
createAttributeNS
DOMString
namespace
DOMString
qualifiedName
);

NewObject
Event
createEvent
DOMString
interface
); // legacy

NewObject
Range
createRange
();

// NodeFilter.SHOW_ALL = 0xFFFFFFFF
NewObject
NodeIterator
createNodeIterator
Node
root
optional
unsigned
long
whatToShow
= 0xFFFFFFFF,
optional
NodeFilter
filter
null
);
NewObject
TreeWalker
createTreeWalker
Node
root
optional
unsigned
long
whatToShow
= 0xFFFFFFFF,
optional
NodeFilter
filter
null
);
};

Exposed
Window
interface
XMLDocument
Document
{};
dictionary
ElementCreationOptions
CustomElementRegistry
customElementRegistry
DOMString
is
};
dictionary
ImportNodeOptions
CustomElementRegistry
customElementRegistry
boolean
selfOnly
false
};

Exposed
Window
interface
DOMImplementation
NewObject
DocumentType
createDocumentType
DOMString
name
DOMString
publicId
DOMString
systemId
);
NewObject
XMLDocument
createDocument
DOMString
namespace
, [
LegacyNullToEmptyString
DOMString
qualifiedName
optional
DocumentType
doctype
null
);
NewObject
Document
createHTMLDocument
optional
DOMString
title
);
boolean
hasFeature
(); // useless; always returns true
};

Exposed
Window
interface
DocumentType
Node
readonly
attribute
DOMString
name
readonly
attribute
DOMString
publicId
readonly
attribute
DOMString
systemId
};

Exposed
Window
interface
DocumentFragment
Node
constructor
();
};

Exposed
Window
interface
ShadowRoot
DocumentFragment
readonly
attribute
ShadowRootMode
mode
readonly
attribute
boolean
delegatesFocus
readonly
attribute
SlotAssignmentMode
slotAssignment
readonly
attribute
boolean
clonable
readonly
attribute
boolean
serializable
readonly
attribute
Element
host
attribute
EventHandler
onslotchange
};
enum
ShadowRootMode
"open"
"closed"
};
enum
SlotAssignmentMode
"manual"
"named"
};

Exposed
Window
interface
Element
Node
readonly
attribute
DOMString
namespaceURI
readonly
attribute
DOMString
prefix
readonly
attribute
DOMString
localName
readonly
attribute
DOMString
tagName

CEReactions
attribute
DOMString
id
CEReactions
attribute
DOMString
className
SameObject
PutForwards
value
readonly
attribute
DOMTokenList
classList
CEReactions
Unscopable
attribute
DOMString
slot
boolean
hasAttributes
();
SameObject
readonly
attribute
NamedNodeMap
attributes
sequence
DOMString
getAttributeNames
();
DOMString
getAttribute
DOMString
qualifiedName
);
DOMString
getAttributeNS
DOMString
namespace
DOMString
localName
);
CEReactions
undefined
setAttribute
DOMString
qualifiedName
, (
TrustedType
or
DOMString
value
);
CEReactions
undefined
setAttributeNS
DOMString
namespace
DOMString
qualifiedName
, (
TrustedType
or
DOMString
value
);
CEReactions
undefined
removeAttribute
DOMString
qualifiedName
);
CEReactions
undefined
removeAttributeNS
DOMString
namespace
DOMString
localName
);
CEReactions
boolean
toggleAttribute
DOMString
qualifiedName
optional
boolean
force
);
boolean
hasAttribute
DOMString
qualifiedName
);
boolean
hasAttributeNS
DOMString
namespace
DOMString
localName
);
Attr
getAttributeNode
DOMString
qualifiedName
);
Attr
getAttributeNodeNS
DOMString
namespace
DOMString
localName
);
CEReactions
Attr
setAttributeNode
Attr
attr
);
CEReactions
Attr
setAttributeNodeNS
Attr
attr
);
CEReactions
Attr
removeAttributeNode
Attr
attr
);
ShadowRoot
attachShadow
ShadowRootInit
init
);
readonly
attribute
ShadowRoot
shadowRoot
readonly
attribute
CustomElementRegistry
customElementRegistry
Element
closest
DOMString
selectors
);
boolean
matches
DOMString
selectors
);
boolean
webkitMatchesSelector
DOMString
selectors
); // legacy alias of .matches
HTMLCollection
getElementsByTagName
DOMString
qualifiedName
);
HTMLCollection
getElementsByTagNameNS
DOMString
namespace
DOMString
localName
);
HTMLCollection
getElementsByClassName
DOMString
classNames
);

CEReactions
Element
insertAdjacentElement
DOMString
where
Element
element
); // legacy
undefined
insertAdjacentText
DOMString
where
DOMString
data
); // legacy
};
dictionary
ShadowRootInit
required
ShadowRootMode
mode
boolean
delegatesFocus
false
SlotAssignmentMode
slotAssignment
= "named";
boolean
clonable
false
boolean
serializable
false
CustomElementRegistry
customElementRegistry
};

Exposed
Window
LegacyUnenumerableNamedProperties
interface
NamedNodeMap
readonly
attribute
unsigned
long
length
getter
Attr
item
unsigned
long
index
);
getter
Attr
getNamedItem
DOMString
qualifiedName
);
Attr
getNamedItemNS
DOMString
namespace
DOMString
localName
);
CEReactions
Attr
setNamedItem
Attr
attr
);
CEReactions
Attr
setNamedItemNS
Attr
attr
);
CEReactions
Attr
removeNamedItem
DOMString
qualifiedName
);
CEReactions
Attr
removeNamedItemNS
DOMString
namespace
DOMString
localName
);
};

Exposed
Window
interface
Attr
Node
readonly
attribute
DOMString
namespaceURI
readonly
attribute
DOMString
prefix
readonly
attribute
DOMString
localName
readonly
attribute
DOMString
name
CEReactions
attribute
DOMString
value
readonly
attribute
Element
ownerElement
readonly
attribute
boolean
specified
; // useless; always returns true
};
Exposed
Window
interface
CharacterData
Node
attribute
LegacyNullToEmptyString
DOMString
data
readonly
attribute
unsigned
long
length
DOMString
substringData
unsigned
long
offset
unsigned
long
count
);
undefined
appendData
DOMString
data
);
undefined
insertData
unsigned
long
offset
DOMString
data
);
undefined
deleteData
unsigned
long
offset
unsigned
long
count
);
undefined
replaceData
unsigned
long
offset
unsigned
long
count
DOMString
data
);
};

Exposed
Window
interface
Text
CharacterData
constructor
optional
DOMString
data
= "");

NewObject
Text
splitText
unsigned
long
offset
);
readonly
attribute
DOMString
wholeText
};

Exposed
Window
interface
CDATASection
Text
};
Exposed
Window
interface
ProcessingInstruction
CharacterData
readonly
attribute
DOMString
target
};
Exposed
Window
interface
Comment
CharacterData
constructor
optional
DOMString
data
= "");
};

Exposed
Window
interface
AbstractRange
readonly
attribute
Node
startContainer
readonly
attribute
unsigned
long
startOffset
readonly
attribute
Node
endContainer
readonly
attribute
unsigned
long
endOffset
readonly
attribute
boolean
collapsed
};
dictionary
StaticRangeInit
required
Node
startContainer
required
unsigned
long
startOffset
required
Node
endContainer
required
unsigned
long
endOffset
};

Exposed
Window
interface
StaticRange
AbstractRange
constructor
StaticRangeInit
init
);
};

Exposed
Window
interface
Range
AbstractRange
constructor
();
readonly
attribute
Node
commonAncestorContainer
undefined
setStart
Node
node
unsigned
long
offset
);
undefined
setEnd
Node
node
unsigned
long
offset
);
undefined
setStartBefore
Node
node
);
undefined
setStartAfter
Node
node
);
undefined
setEndBefore
Node
node
);
undefined
setEndAfter
Node
node
);
undefined
collapse
optional
boolean
toStart
false
);
undefined
selectNode
Node
node
);
undefined
selectNodeContents
Node
node
);
const
unsigned
short
START_TO_START
= 0;
const
unsigned
short
START_TO_END
= 1;
const
unsigned
short
END_TO_END
= 2;
const
unsigned
short
END_TO_START
= 3;
short
compareBoundaryPoints
unsigned
short
how
Range
sourceRange
);

CEReactions
undefined
deleteContents
();
CEReactions
NewObject
DocumentFragment
extractContents
();
CEReactions
NewObject
DocumentFragment
cloneContents
();
CEReactions
undefined
insertNode
Node
node
);
CEReactions
undefined
surroundContents
Node
newParent
);

NewObject
Range
cloneRange
();
undefined
detach
();
boolean
isPointInRange
Node
node
unsigned
long
offset
);
short
comparePoint
Node
node
unsigned
long
offset
);
boolean
intersectsNode
Node
node
);
stringifier
};

Exposed
Window
interface
NodeIterator
SameObject
readonly
attribute
Node
root
readonly
attribute
Node
referenceNode
readonly
attribute
boolean
pointerBeforeReferenceNode
readonly
attribute
unsigned
long
whatToShow
readonly
attribute
NodeFilter
filter
Node
nextNode
();
Node
previousNode
();
undefined
detach
();
};

Exposed
Window
interface
TreeWalker
SameObject
readonly
attribute
Node
root
readonly
attribute
unsigned
long
whatToShow
readonly
attribute
NodeFilter
filter
attribute
Node
currentNode
Node
parentNode
();
Node
firstChild
();
Node
lastChild
();
Node
previousSibling
();
Node
nextSibling
();
Node
previousNode
();
Node
nextNode
();
};
Exposed
Window
callback
interface
NodeFilter
// Constants for acceptNode()
const
unsigned
short
FILTER_ACCEPT
= 1;
const
unsigned
short
FILTER_REJECT
= 2;
const
unsigned
short
FILTER_SKIP
= 3;

// Constants for whatToShow
const
unsigned
long
SHOW_ALL
= 0xFFFFFFFF;
const
unsigned
long
SHOW_ELEMENT
= 0x1;
const
unsigned
long
SHOW_ATTRIBUTE
= 0x2;
const
unsigned
long
SHOW_TEXT
= 0x4;
const
unsigned
long
SHOW_CDATA_SECTION
= 0x8;
const
unsigned
long
SHOW_ENTITY_REFERENCE
= 0x10; // legacy
const
unsigned
long
SHOW_ENTITY
= 0x20; // legacy
const
unsigned
long
SHOW_PROCESSING_INSTRUCTION
= 0x40;
const
unsigned
long
SHOW_COMMENT
= 0x80;
const
unsigned
long
SHOW_DOCUMENT
= 0x100;
const
unsigned
long
SHOW_DOCUMENT_TYPE
= 0x200;
const
unsigned
long
SHOW_DOCUMENT_FRAGMENT
= 0x400;
const
unsigned
long
SHOW_NOTATION
= 0x800; // legacy
unsigned
short
acceptNode
Node
node
);
};

Exposed
Window
interface
DOMTokenList
readonly
attribute
unsigned
long
length
getter
DOMString
item
unsigned
long
index
);
boolean
contains
DOMString
token
);
CEReactions
undefined
add
DOMString
...
tokens
);
CEReactions
undefined
remove
DOMString
...
tokens
);
CEReactions
boolean
toggle
DOMString
token
optional
boolean
force
);
CEReactions
boolean
replace
DOMString
token
DOMString
newToken
);
boolean
supports
DOMString
token
);
CEReactions
stringifier
attribute
DOMString
value
iterable
DOMString
>;
};

Exposed
Window
interface
XPathResult
const
unsigned
short
ANY_TYPE
= 0;
const
unsigned
short
NUMBER_TYPE
= 1;
const
unsigned
short
STRING_TYPE
= 2;
const
unsigned
short
BOOLEAN_TYPE
= 3;
const
unsigned
short
UNORDERED_NODE_ITERATOR_TYPE
= 4;
const
unsigned
short
ORDERED_NODE_ITERATOR_TYPE
= 5;
const
unsigned
short
UNORDERED_NODE_SNAPSHOT_TYPE
= 6;
const
unsigned
short
ORDERED_NODE_SNAPSHOT_TYPE
= 7;
const
unsigned
short
ANY_UNORDERED_NODE_TYPE
= 8;
const
unsigned
short
FIRST_ORDERED_NODE_TYPE
= 9;
readonly
attribute
unsigned
short
resultType
readonly
attribute
unrestricted
double
numberValue
readonly
attribute
DOMString
stringValue
readonly
attribute
boolean
booleanValue
readonly
attribute
Node
singleNodeValue
readonly
attribute
boolean
invalidIteratorState
readonly
attribute
unsigned
long
snapshotLength
Node
iterateNext
();
Node
snapshotItem
unsigned
long
index
);
};

Exposed
Window
interface
XPathExpression
// XPathResult.ANY_TYPE = 0
XPathResult
evaluate
Node
contextNode
optional
unsigned
short
type
= 0,
optional
XPathResult
result
null
);
};
callback
interface
XPathNSResolver
DOMString
lookupNamespaceURI
DOMString
prefix
);
};
interface
mixin
XPathEvaluatorBase
NewObject
XPathExpression
createExpression
DOMString
expression
optional
XPathNSResolver
resolver
null
);
Node
createNSResolver
Node
nodeResolver
); // legacy
// XPathResult.ANY_TYPE = 0
XPathResult
evaluate
DOMString
expression
Node
contextNode
optional
XPathNSResolver
resolver
null
optional
unsigned
short
type
= 0,
optional
XPathResult
result
null
);
};
Document
includes
XPathEvaluatorBase

Exposed
Window
interface
XPathEvaluator
constructor
();
};
XPathEvaluator
includes
XPathEvaluatorBase

Exposed
Window
interface
XSLTProcessor
constructor
();
undefined
importStylesheet
Node
style
);
CEReactions
DocumentFragment
transformToFragment
Node
source
Document
output
);
CEReactions
Document
transformToDocument
Node
source
);
undefined
setParameter
([
LegacyNullToEmptyString
DOMString
namespaceURI
DOMString
localName
any
value
);
any
getParameter
([
LegacyNullToEmptyString
DOMString
namespaceURI
DOMString
localName
);
undefined
removeParameter
([
LegacyNullToEmptyString
DOMString
namespaceURI
DOMString
localName
);
undefined
clearParameters
();
undefined
reset
();
};
MDN
AbortController/AbortController
In all current engines.
Firefox
57+
Safari
12.1+
Chrome
66+
Opera
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
15.0.0+
AbortController/abort
In all current engines.
Firefox
57+
Safari
12.1+
Chrome
66+
Opera
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
15.0.0+
MDN
AbortController/signal
In all current engines.
Firefox
57+
Safari
12.1+
Chrome
66+
Opera
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
15.0.0+
MDN
AbortController
In all current engines.
Firefox
57+
Safari
12.1+
Chrome
66+
Opera
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
15.0.0+
MDN
AbortSignal/abort_event
In all current engines.
Firefox
57+
Safari
11.1+
Chrome
66+
Opera
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
15.0.0+
MDN
AbortSignal/abort_event
In all current engines.
Firefox
57+
Safari
11.1+
Chrome
66+
Opera
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
15.0.0+
MDN
AbortSignal/abort_static
In all current engines.
Firefox
88+
Safari
15+
Chrome
93+
Opera
Edge
93+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
15.12.0+
MDN
AbortSignal/aborted
In all current engines.
Firefox
57+
Safari
11.1+
Chrome
66+
Opera
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
15.0.0+
MDN
AbortSignal/reason
In all current engines.
Firefox
97+
Safari
15.4+
Chrome
98+
Opera
Edge
98+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
17.2.0+
MDN
AbortSignal/throwIfAborted
In all current engines.
Firefox
97+
Safari
15.4+
Chrome
100+
Opera
Edge
100+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
17.3.0+
MDN
AbortSignal/timeout_static
In all current engines.
Firefox
100+
Safari
16+
Chrome
103+
Opera
Edge
103+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
17.3.0+
MDN
AbortSignal
In all current engines.
Firefox
57+
Safari
11.1+
Chrome
66+
Opera
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
15.0.0+
MDN
AbstractRange/collapsed
In all current engines.
Firefox
69+
Safari
14.1+
Chrome
90+
Opera
Edge
90+
Edge (Legacy)
None
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Range/collapsed
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
StaticRange/collapsed
In all current engines.
Firefox
69+
Safari
10.1+
Chrome
60+
Opera
Edge
79+
Edge (Legacy)
18
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
AbstractRange/endContainer
In all current engines.
Firefox
69+
Safari
14.1+
Chrome
90+
Opera
Edge
90+
Edge (Legacy)
None
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Range/endContainer
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
StaticRange/endContainer
In all current engines.
Firefox
69+
Safari
10.1+
Chrome
60+
Opera
Edge
79+
Edge (Legacy)
18
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
AbstractRange/endOffset
In all current engines.
Firefox
69+
Safari
14.1+
Chrome
90+
Opera
Edge
90+
Edge (Legacy)
None
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Range/endOffset
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
StaticRange/endOffset
In all current engines.
Firefox
69+
Safari
10.1+
Chrome
60+
Opera
Edge
79+
Edge (Legacy)
18
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
AbstractRange/startContainer
In all current engines.
Firefox
69+
Safari
14.1+
Chrome
90+
Opera
Edge
90+
Edge (Legacy)
None
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Range/startContainer
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
StaticRange/startContainer
In all current engines.
Firefox
69+
Safari
10.1+
Chrome
60+
Opera
Edge
79+
Edge (Legacy)
18
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
AbstractRange/startOffset
In all current engines.
Firefox
69+
Safari
14.1+
Chrome
90+
Opera
Edge
90+
Edge (Legacy)
None
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Range/startOffset
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
StaticRange/startOffset
In all current engines.
Firefox
69+
Safari
10.1+
Chrome
60+
Opera
Edge
79+
Edge (Legacy)
18
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
AbstractRange
In all current engines.
Firefox
69+
Safari
14.1+
Chrome
90+
Opera
Edge
90+
Edge (Legacy)
None
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Attr/localName
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Attr/name
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Attr/namespaceURI
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Attr/ownerElement
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
8+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Attr/prefix
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Attr/value
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Attr
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
8+
Edge
79+
Edge (Legacy)
12+
IE
5.5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
CDATASection
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
12.1+
MDN
CharacterData/after
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
39+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
DocumentType/after
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
39+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Element/after
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
39+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
CharacterData/appendData
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
CharacterData/before
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
39+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
DocumentType/before
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
39+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Element/before
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
39+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
CharacterData/data
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
CharacterData/deleteData
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
CharacterData/insertData
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
CharacterData/length
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
CharacterData/nextElementSibling
In all current engines.
Firefox
25+
Safari
9+
Chrome
29+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Element/nextElementSibling
In all current engines.
Firefox
3.5+
Safari
4+
Chrome
2+
Opera
10+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
10.1+
MDN
CharacterData/previousElementSibling
In all current engines.
Firefox
25+
Safari
9+
Chrome
29+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Element/previousElementSibling
In all current engines.
Firefox
3.5+
Safari
4+
Chrome
2+
Opera
10+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
10.1+
MDN
CharacterData/remove
In all current engines.
Firefox
23+
Safari
7+
Chrome
24+
Opera
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
DocumentType/remove
In all current engines.
Firefox
23+
Safari
7+
Chrome
24+
Opera
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Element/remove
In all current engines.
Firefox
23+
Safari
7+
Chrome
24+
Opera
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
CharacterData/replaceData
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
CharacterData/replaceWith
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
39+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
DocumentType/replaceWith
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
39+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Element/replaceWith
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
39+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
CharacterData/substringData
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
CharacterData
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Comment/Comment
In all current engines.
Firefox
24+
Safari
8+
Chrome
29+
Opera
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Comment
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
CustomEvent/CustomEvent
In all current engines.
Firefox
11+
Safari
6+
Chrome
15+
Opera
11.6+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12+
MDN
CustomEvent/detail
In all current engines.
Firefox
6+
Safari
5+
Chrome
5+
Opera
11.6+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
5+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12+
MDN
CustomEvent
In all current engines.
Firefox
6+
Safari
5+
Chrome
5+
Opera
11+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
5+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
11+
Node.js
19.0.0+
MDN
DOMImplementation/createDocument
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
DOMImplementation/createDocumentType
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
DOMImplementation/createHTMLDocument
In all current engines.
Firefox
4+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
DOMImplementation
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
DOMTokenList/add
In all current engines.
Firefox
3.6+
Safari
5.1+
Chrome
8+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
10+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
DOMTokenList/contains
In all current engines.
Firefox
3.6+
Safari
5.1+
Chrome
8+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
10+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
DOMTokenList/item
In all current engines.
Firefox
3.6+
Safari
5.1+
Chrome
8+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
10+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
DOMTokenList/length
In all current engines.
Firefox
3.6+
Safari
5.1+
Chrome
8+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
10+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
DOMTokenList/remove
In all current engines.
Firefox
3.6+
Safari
5.1+
Chrome
8+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
10+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
DOMTokenList/replace
In all current engines.
Firefox
49+
Safari
10.1+
Chrome
61+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
DOMTokenList/supports
In all current engines.
Firefox
49+
Safari
10.1+
Chrome
49+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
DOMTokenList/toggle
In all current engines.
Firefox
3.6+
Safari
5.1+
Chrome
8+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
10+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
DOMTokenList/value
In all current engines.
Firefox
47+
Safari
10+
Chrome
50+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
DOMTokenList
In all current engines.
Firefox
3.6+
Safari
5.1+
Chrome
8+
Opera
11.5+
Edge
79+
Edge (Legacy)
12+
IE
10+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
11.5+
MDN
Document/Document
In all current engines.
Firefox
20+
Safari
8+
Chrome
60+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Document/URL
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
3+
Edge
79+
Edge (Legacy)
12+
IE
4+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Document/adoptNode
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/append
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
DocumentFragment/append
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Element/append
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Document/characterSet
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
1+
Samsung Internet
Opera Mobile
12.1+
MDN
Document/childElementCount
In all current engines.
Firefox
25+
Safari
9+
Chrome
29+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
DocumentFragment/childElementCount
In all current engines.
Firefox
25+
Safari
9+
Chrome
29+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Element/childElementCount
In all current engines.
Firefox
3.5+
Safari
4+
Chrome
2+
Opera
10+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
10.1+
MDN
Document/children
In all current engines.
Firefox
25+
Safari
9+
Chrome
29+
Opera
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
DocumentFragment/children
In all current engines.
Firefox
25+
Safari
9+
Chrome
29+
Opera
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Element/children
In all current engines.
Firefox
3.5+
Safari
4+
Chrome
1+
Opera
10+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Document/compatMode
In all current engines.
Firefox
1+
Safari
3.1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/contentType
In all current engines.
Firefox
1+
Safari
9+
Chrome
36+
Opera
23+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
24+
MDN
Document/createAttribute
In all current engines.
Firefox
44+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/createAttributeNS
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/createCDATASection
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
Document/createComment
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/createDocumentFragment
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/createElement
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
6+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
4+
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Document/createElementNS
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
4+
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/createEvent
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
4+
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Document/createExpression
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
XPathEvaluator/createExpression
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/createNodeIterator
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Document/createNSResolver
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
XPathEvaluator/createNSResolver
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/createProcessingInstruction
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/createRange
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/createTextNode
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Document/createTreeWalker
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Document/doctype
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/documentElement
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Document/documentURI
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/evaluate
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
10.1+
XPathEvaluator/evaluate
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/firstElementChild
In all current engines.
Firefox
25+
Safari
9+
Chrome
29+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
DocumentFragment/firstElementChild
In all current engines.
Firefox
25+
Safari
9+
Chrome
29+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Element/firstElementChild
In all current engines.
Firefox
3.5+
Safari
4+
Chrome
2+
Opera
10+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
10.1+
MDN
Document/getElementById
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
5.5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Document/getElementsByClassName
In all current engines.
Firefox
3+
Safari
3.1+
Chrome
1+
Opera
9.5+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Document/getElementsByTagName
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
5.1+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Document/getElementsByTagNameNS
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/implementation
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Document/importNode
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Document/lastElementChild
In all current engines.
Firefox
25+
Safari
9+
Chrome
29+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
DocumentFragment/lastElementChild
In all current engines.
Firefox
25+
Safari
9+
Chrome
29+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Element/lastElementChild
In all current engines.
Firefox
3.5+
Safari
4+
Chrome
2+
Opera
10+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
10.1+
MDN
Document/prepend
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
DocumentFragment/prepend
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Element/prepend
In all current engines.
Firefox
49+
Safari
10+
Chrome
54+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Document/querySelector
In all current engines.
Firefox
3.5+
Safari
3.1+
Chrome
1+
Opera
10+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
DocumentFragment/querySelector
In all current engines.
Firefox
3.5+
Safari
4+
Chrome
2+
Opera
10+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
10.1+
MDN
Document/querySelectorAll
In all current engines.
Firefox
3.5+
Safari
3.1+
Chrome
1+
Opera
10+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
DocumentFragment/querySelectorAll
In all current engines.
Firefox
3.5+
Safari
4+
Chrome
2+
Opera
10+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
10.1+
Element/querySelector
In all current engines.
Firefox
3.5+
Safari
3.1+
Chrome
1+
Opera
10+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
Element/querySelectorAll
In all current engines.
Firefox
3.5+
Safari
3.1+
Chrome
1+
Opera
10+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Document/replaceChildren
In all current engines.
Firefox
78+
Safari
14+
Chrome
86+
Opera
Edge
86+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
DocumentFragment/replaceChildren
In all current engines.
Firefox
78+
Safari
14+
Chrome
86+
Opera
Edge
86+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Element/replaceChildren
In all current engines.
Firefox
78+
Safari
14+
Chrome
86+
Opera
Edge
86+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Document
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
3+
Edge
79+
Edge (Legacy)
12+
IE
4+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
10.1+
MDN
DocumentFragment/DocumentFragment
In all current engines.
Firefox
24+
Safari
8+
Chrome
29+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
DocumentFragment/getElementById
In all current engines.
Firefox
28+
Safari
9+
Chrome
36+
Opera
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
DocumentFragment
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
8+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
DocumentType/name
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
DocumentType/publicId
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
DocumentType/systemId
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
DocumentType
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
12.1+
MDN
Element/assignedSlot
In all current engines.
Firefox
63+
Safari
10+
Chrome
53+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Text/assignedSlot
In all current engines.
Firefox
63+
Safari
10+
Chrome
53+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Element/attachShadow
In all current engines.
Firefox
63+
Safari
10+
Chrome
53+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Element/attributes
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
8+
Edge
79+
Edge (Legacy)
12+
IE
5.5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Element/classList
In all current engines.
Firefox
3.6+
Safari
7+
Chrome
22+
Opera
11.5+
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
4.4+
Samsung Internet
Opera Mobile
11.5+
MDN
Element/className
In all current engines.
Firefox
1+
Safari
1+
Chrome
22+
Opera
8+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Element/closest
In all current engines.
Firefox
35+
Safari
6+
Chrome
41+
Opera
Edge
79+
Edge (Legacy)
15+
IE
None
Firefox for Android
iOS Safari
9+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Element/getAttribute
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
8+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Element/getAttributeNames
In all current engines.
Firefox
45+
Safari
10.1+
Chrome
61+
Opera
Edge
79+
Edge (Legacy)
18
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Element/getAttributeNode
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/getAttributeNodeNS
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/getAttributeNS
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/getElementsByClassName
In all current engines.
Firefox
3+
Safari
3.1+
Chrome
1+
Opera
9.5+
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
4+
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Element/getElementsByTagName
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
8+
Edge
79+
Edge (Legacy)
12+
IE
5.5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Element/getElementsByTagNameNS
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
4+
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/hasAttribute
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
8+
Edge
79+
Edge (Legacy)
12+
IE
8+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Element/hasAttributeNS
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/hasAttributes
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
8+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/id
In all current engines.
Firefox
1+
Safari
1+
Chrome
23+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/insertAdjacentElement
In all current engines.
Firefox
48+
Safari
3+
Chrome
1+
Opera
8+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Element/insertAdjacentText
In all current engines.
Firefox
48+
Safari
4+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
4+
Chrome for Android
Android WebView
2.2+
Samsung Internet
Opera Mobile
12.1+
MDN
Element/localName
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/matches
In all current engines.
Firefox
34+
Safari
8+
Chrome
33+
Opera
21+
Edge
79+
Edge (Legacy)
15+
IE
None
Firefox for Android
34+
iOS Safari
Chrome for Android
Android WebView
4.4+
Samsung Internet
Opera Mobile
21+
MDN
Element/namespaceURI
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/prefix
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/removeAttribute
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
8+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Element/removeAttributeNode
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/removeAttributeNS
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/setAttribute
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
8+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Element/setAttributeNode
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/setAttributeNodeNS
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/setAttributeNS
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Element/shadowRoot
In all current engines.
Firefox
63+
Safari
10+
Chrome
35+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Element/slot
In all current engines.
Firefox
63+
Safari
10+
Chrome
53+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Global_attributes/slot
In all current engines.
Firefox
63+
Safari
10+
Chrome
53+
Opera
Edge
79+
Edge (Legacy)
None
IE
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Element/tagName
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
8+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Element/toggleAttribute
In all current engines.
Firefox
63+
Safari
12+
Chrome
69+
Opera
Edge
79+
Edge (Legacy)
18
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Element
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
8+
Edge
79+
Edge (Legacy)
12+
IE
4+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
10.1+
MDN
Event/Event
In all current engines.
Firefox
11+
Safari
6+
Chrome
15+
Opera
11.6+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12+
Node.js
15.0.0+
MDN
Event/bubbles
In all current engines.
Firefox
1.5+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
12.1+
Node.js
14.5.0+
MDN
Event/cancelable
In all current engines.
Firefox
1.5+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
12.1+
Node.js
14.5.0+
MDN
Event/composed
In all current engines.
Firefox
52+
Safari
10+
Chrome
53+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
14.5.0+
MDN
Event/composedPath
In all current engines.
Firefox
59+
Safari
10+
Chrome
53+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
14.5.0+
MDN
Event/currentTarget
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
Node.js
14.5.0+
MDN
Event/defaultPrevented
In all current engines.
Firefox
6+
Safari
5+
Chrome
5+
Opera
11+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
5+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
11+
Node.js
14.5.0+
MDN
Event/eventPhase
In all current engines.
Firefox
1.5+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
Node.js
14.5.0+
MDN
Event/isTrusted
In all current engines.
Firefox
1.5+
Safari
10+
Chrome
46+
Opera
33+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
46+
Samsung Internet
Opera Mobile
33+
Node.js
14.5.0+
MDN
Event/preventDefault
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
Node.js
14.5.0+
MDN
Event/stopImmediatePropagation
In all current engines.
Firefox
10+
Safari
5+
Chrome
5+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
5+
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
12.1+
Node.js
14.5.0+
MDN
Event/stopPropagation
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
Node.js
14.5.0+
MDN
Event/target
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
Node.js
14.5.0+
MDN
Event/timeStamp
In all current engines.
Firefox
1.5+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
1+
Samsung Internet
Opera Mobile
12.1+
Node.js
14.5.0+
MDN
Event/type
In all current engines.
Firefox
1.5+
Safari
1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
Node.js
14.5.0+
MDN
Event
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
4+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
10.1+
Node.js
14.5.0+
MDN
EventTarget/EventTarget
In all current engines.
Firefox
59+
Safari
14+
Chrome
64+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Node.js
15.0.0+
MDN
EventTarget/addEventListener
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
1+
Samsung Internet
Opera Mobile
10.1+
Node.js
14.5.0+
MDN
EventTarget/dispatchEvent
In all current engines.
Firefox
2+
Safari
3.1+
Chrome
4+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
4+
Samsung Internet
Opera Mobile
10.1+
Node.js
14.5.0+
MDN
EventTarget/removeEventListener
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
Node.js
14.5.0+
MDN
EventTarget
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
10.1+
Node.js
14.5.0+
MDN
HTMLCollection/item
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
8+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
HTMLCollection/length
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
8+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
HTMLCollection/namedItem
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
8+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
HTMLCollection
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
8+
Edge
79+
Edge (Legacy)
12+
IE
8+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
HTMLSlotElement/slotchange_event
In all current engines.
Firefox
63+
Safari
10.1+
Chrome
53+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
MutationObserver/MutationObserver
In all current engines.
Firefox
14+
Safari
7+
Chrome
26+
Opera
15+
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
4.4+
Samsung Internet
Opera Mobile
14+
MDN
MutationObserver/disconnect
In all current engines.
Firefox
14+
Safari
6+
Chrome
18+
Opera
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
MutationObserver/observe
In all current engines.
Firefox
14+
Safari
6+
Chrome
18+
Opera
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
6+
Chrome for Android
Android WebView
4.4+
Samsung Internet
Opera Mobile
MDN
MutationObserver/takeRecords
In all current engines.
Firefox
14+
Safari
6+
Chrome
20+
Opera
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
MutationObserver
In all current engines.
Firefox
14+
Safari
7+
Chrome
26+
Opera
15+
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
4.4+
Samsung Internet
Opera Mobile
14+
MDN
MutationRecord/addedNodes
In all current engines.
Firefox
14+
Safari
7+
Chrome
16+
Opera
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
MutationRecord/attributeName
In all current engines.
Firefox
14+
Safari
7+
Chrome
16+
Opera
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
MutationRecord/attributeNamespace
In all current engines.
Firefox
14+
Safari
7+
Chrome
16+
Opera
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
MutationRecord/nextSibling
In all current engines.
Firefox
14+
Safari
7+
Chrome
16+
Opera
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
MutationRecord/oldValue
In all current engines.
Firefox
14+
Safari
7+
Chrome
16+
Opera
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
MutationRecord/previousSibling
In all current engines.
Firefox
14+
Safari
7+
Chrome
16+
Opera
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
MutationRecord/removedNodes
In all current engines.
Firefox
14+
Safari
7+
Chrome
16+
Opera
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
MutationRecord/target
In all current engines.
Firefox
14+
Safari
7+
Chrome
16+
Opera
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
MutationRecord/type
In all current engines.
Firefox
14+
Safari
7+
Chrome
16+
Opera
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
MutationRecord
In all current engines.
Firefox
14+
Safari
7+
Chrome
16+
Opera
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
NamedNodeMap/getNamedItem
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
NamedNodeMap/getNamedItemNS
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
NamedNodeMap/item
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
NamedNodeMap/length
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
NamedNodeMap/removeNamedItem
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
NamedNodeMap/removeNamedItemNS
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
NamedNodeMap/setNamedItem
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
NamedNodeMap/setNamedItemNS
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
NamedNodeMap
In all current engines.
Firefox
34+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/appendChild
In all current engines.
Firefox
1+
Safari
1.1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Node/baseURI
In all current engines.
Firefox
1+
Safari
4+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/childNodes
In all current engines.
Firefox
1+
Safari
1.2+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Node/cloneNode
In all current engines.
Firefox
1+
Safari
1.1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Node/compareDocumentPosition
In all current engines.
Firefox
1+
Safari
4+
Chrome
2+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
12.1+
MDN
Node/contains
In all current engines.
Firefox
9+
Safari
1.1+
Chrome
16+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Node/firstChild
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/getRootNode
In all current engines.
Firefox
53+
Safari
10.1+
Chrome
54+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Node/hasChildNodes
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/insertBefore
In all current engines.
Firefox
1+
Safari
1.1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Node/isConnected
In all current engines.
Firefox
49+
Safari
10+
Chrome
51+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
6.0+
Opera Mobile
MDN
Node/isDefaultNamespace
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/isEqualNode
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/isSameNode
In all current engines.
Firefox
48+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/lastChild
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
45+
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/lookupNamespaceURI
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/lookupPrefix
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/nextSibling
In all current engines.
Firefox
1+
Safari
1.1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
5.5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Node/nodeName
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/nodeType
In all current engines.
Firefox
1+
Safari
1.1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Node/nodeValue
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/normalize
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/ownerDocument
In all current engines.
Firefox
9+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/parentElement
In all current engines.
Firefox
9+
Safari
1.1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
8+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Node/parentNode
In all current engines.
Firefox
1+
Safari
1.1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
5.5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Node/previousSibling
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
5.5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Node/removeChild
In all current engines.
Firefox
1+
Safari
1.1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Node/replaceChild
In all current engines.
Firefox
1+
Safari
1.1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
6+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Node/textContent
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Node
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
7+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
10.1+
MDN
NodeIterator/filter
In all current engines.
Firefox
3.5+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
NodeIterator/nextNode
In all current engines.
Firefox
3.5+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
NodeIterator/pointerBeforeReferenceNode
In all current engines.
Firefox
3.5+
Safari
3+
Chrome
1+
Opera
15+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
14+
MDN
NodeIterator/previousNode
In all current engines.
Firefox
3.5+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
NodeIterator/referenceNode
In all current engines.
Firefox
3.5+
Safari
3+
Chrome
1+
Opera
15+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
14+
MDN
NodeIterator/root
In all current engines.
Firefox
3.5+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
NodeIterator/whatToShow
In all current engines.
Firefox
3.5+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
NodeIterator
In all current engines.
Firefox
3.5+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
NodeList/forEach
In all current engines.
Firefox
50+
Safari
10+
Chrome
51+
Opera
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
Reference/Global_Objects/Array/@@iterator
In all current engines.
Firefox
36+
Safari
10+
Chrome
51+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
NodeList
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
8+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
NodeList/item
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
NodeList/length
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
ProcessingInstruction/target
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
ProcessingInstruction
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Range/Range
In all current engines.
Firefox
24+
Safari
8+
Chrome
29+
Opera
Edge
79+
Edge (Legacy)
15+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Range/cloneContents
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/cloneRange
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/collapse
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/commonAncestorContainer
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/compareBoundaryPoints
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/comparePoint
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Range/deleteContents
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/detach
Firefox
1–15
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/extractContents
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/insertNode
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/intersectsNode
In all current engines.
Firefox
17+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
17+
IE
None
Firefox for Android
19+
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Range/isPointInRange
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
15+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Range/selectNode
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/selectNodeContents
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/setEnd
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/setEndAfter
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/setEndBefore
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/setStart
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/setStartAfter
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/setStartBefore
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/surroundContents
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range/toString
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
Range
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
10.1+
MDN
ShadowRoot/delegatesFocus
In all current engines.
Firefox
94+
Safari
15+
Chrome
53+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
ShadowRoot/host
In all current engines.
Firefox
63+
Safari
10+
Chrome
53+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
ShadowRoot/mode
In all current engines.
Firefox
63+
Safari
10.1+
Chrome
53+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
ShadowRoot/slotAssignment
In all current engines.
Firefox
92+
Safari
16.4+
Chrome
86+
Opera
Edge
86+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
ShadowRoot
In all current engines.
Firefox
63+
Safari
10+
Chrome
53+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
StaticRange/StaticRange
In all current engines.
Firefox
71+
Safari
13.1+
Chrome
90+
Opera
Edge
90+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
StaticRange
In all current engines.
Firefox
69+
Safari
10.1+
Chrome
60+
Opera
Edge
79+
Edge (Legacy)
18
IE
None
Firefox for Android
79+
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Text/Text
In all current engines.
Firefox
24+
Safari
8+
Chrome
29+
Opera
Edge
79+
Edge (Legacy)
16+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
MDN
Text/splitText
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
1+
Samsung Internet
Opera Mobile
12.1+
MDN
Text/wholeText
In all current engines.
Firefox
3.5+
Safari
4+
Chrome
2+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
Text
In all current engines.
Firefox
1+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
5+
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
12.1+
MDN
TreeWalker/currentNode
In all current engines.
Firefox
4+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
10.1+
MDN
TreeWalker/filter
In all current engines.
Firefox
4+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
10.1+
MDN
TreeWalker/firstChild
In all current engines.
Firefox
4+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
10.1+
MDN
TreeWalker/lastChild
In all current engines.
Firefox
4+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
10.1+
MDN
TreeWalker/nextNode
In all current engines.
Firefox
4+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
10.1+
MDN
TreeWalker/nextSibling
In all current engines.
Firefox
4+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
10.1+
MDN
TreeWalker/parentNode
In all current engines.
Firefox
4+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
10.1+
MDN
TreeWalker/previousNode
In all current engines.
Firefox
4+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
10.1+
MDN
TreeWalker/previousSibling
In all current engines.
Firefox
4+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
10.1+
MDN
TreeWalker/root
In all current engines.
Firefox
4+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
10.1+
MDN
TreeWalker/whatToShow
In all current engines.
Firefox
4+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
10.1+
MDN
TreeWalker
In all current engines.
Firefox
4+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
IE
9+
Firefox for Android
iOS Safari
3+
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
10.1+
MDN
XMLDocument
In all current engines.
Firefox
1+
Safari
10+
Chrome
34+
Opera
21+
Edge
79+
Edge (Legacy)
12+
IE
11
Firefox for Android
iOS Safari
10+
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
21+
MDN
XPathEvaluator/XPathEvaluator
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
XPathEvaluator
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
XPathExpression/evaluate
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
XPathExpression
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
XPathResult/booleanValue
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
XPathResult/invalidIteratorState
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
12.1+
MDN
XPathResult/iterateNext
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
XPathResult/numberValue
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
XPathResult/resultType
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
37+
Samsung Internet
Opera Mobile
12.1+
MDN
XPathResult/singleNodeValue
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
XPathResult/snapshotItem
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
XPathResult/snapshotLength
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
XPathResult/stringValue
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
XPathResult
In all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
1+
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile
12.1+
MDN
XSLTProcessor/XSLTProcessor
In all current engines.
Firefox
1+
Safari
3.1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
XSLTProcessor/clearParameters
In all current engines.
Firefox
1+
Safari
3.1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
XSLTProcessor/getParameter
In all current engines.
Firefox
1+
Safari
3.1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
XSLTProcessor/importStylesheet
In all current engines.
Firefox
1+
Safari
3.1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
XSLTProcessor/removeParameter
In all current engines.
Firefox
1+
Safari
3.1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
XSLTProcessor/reset
In all current engines.
Firefox
1+
Safari
3.1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
XSLTProcessor/setParameter
In all current engines.
Firefox
1+
Safari
3.1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
XSLTProcessor/transformToDocument
In all current engines.
Firefox
1+
Safari
3.1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
XSLTProcessor/transformToFragment
In all current engines.
Firefox
1+
Safari
3.1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
XSLTProcessor
In all current engines.
Firefox
1+
Safari
3.1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
3+
Samsung Internet
Opera Mobile
12.1+
MDN
Element/slot
In all current engines.
Firefox
63+
Safari
10+
Chrome
53+
Opera
Edge
79+
Edge (Legacy)
IE
None
Firefox for Android
iOS Safari
Chrome for Android
Android WebView
Samsung Internet
Opera Mobile