…hat appear as whitespace, or that can cause rendering or parsing issues in some tools, such as the direction override codepoints. Note that this is a weaker set of restrictions than UAX 31 recommends for identifiers (used by languages such as JavaScript to restrict their identifi…

…hat appear as whitespace, or that can cause rendering or parsing issues in some tools, such as the direction override codepoints. Note that this is a weaker set of restrictions than UAX 31 recommends for identifiers (used by languages such as JavaScript to restrict their identifi…

…s and CSS implementors. We hope the specification will provide authors with the tools they need to write efficient, attractive, and accessible documents, without overexposing them to CSS’s implementation details. Implementors, however, should find all they need to build conformin…

…s and CSS implementors. We hope the specification will provide authors with the tools they need to write efficient, attractive, and accessible documents, without overexposing them to CSS’s implementation details. Implementors, however, should find all they need to build conformin…

…which does not exist on the device where the UA is running (for example, speech UAs do not have a concept of “width”), the media feature must always evaluate to false. The media feature device-aspect-ratio only applies to visual devices. On an speech device, expressions involving…

…rsal Windows Platform app use extensions to CSS implemented by their respective UAs. So long as these UAs do not allow Web content to access these features, they do not provide an opportunity for such content to become dependent on their proprietary extensions Even if a feature i…

…rsal Windows Platform app use extensions to CSS implemented by their respective UAs. So long as these UAs do not allow Web content to access these features, they do not provide an opportunity for such content to become dependent on their proprietary extensions Even if a feature i…

…ting the author disable selection on UI elements that are not useful to select. Tools such as CSS validators, linters, or in-browser developer tools are encouraged to use heuristics to detect and warn against incorrect or abusive usage that would hamper usability or violate commo…

…ting the author disable selection on UI elements that are not useful to select. Tools such as CSS validators, linters, or in-browser developer tools are encouraged to use heuristics to detect and warn against incorrect or abusive usage that would hamper usability or violate commo…

…out worrying about stylesheets that include it being completely broken in older UAs. The precise error-recovery behavior is detailed in the parser itself, but it’s simple enough that a short description is fairly accurate. At the "top level" of a stylesheet, an <at-keyword-token>…

… baseline tables can be provided for alignment in horizontal and vertical text. UAs should use the vertical tables in vertical typographic modes and the horizontal tables otherwise. Note: Fonts can have more than one baseline table in each axis; the UA is responsible for choosing…

…ed in Level 4, and will be applied by default to the HTML ins and del elements. UAs may interrupt underlines and overlines where the line would cross glyph ink and to some distance to either side of the glyph outline; this behavior is not controllable in this level, but will be f…

…t apart from other normative text with <strong class="advisement"> , like this: UAs MUST provide an accessible alternative. Conformance classes Conformance to this specification is defined for three conformance classes: style sheet CSS style sheet renderer UA that interprets the …

…which does not exist on the device where the UA is running (for example, speech UAs do not have a concept of “width”), the media feature must always evaluate to false. The media feature device-aspect-ratio only applies to visual devices. On an speech device, expressions involving…

…t apart from other normative text with <strong class="advisement"> , like this: UAs MUST provide an accessible alternative. Tests Tests relating to the content of this specification may be documented in “Tests” blocks like this one. Any such block is non-normative. Conformance cl…