CSS WG Blog Minutes Tokyo F2F Part V: Core Syntax, Con…

Minutes Tokyo F2F Part V: Core Syntax, Conditional Rules Syntax, Variables Syntax, Media Queries Syntax, Misc Syntax

Conditional Rules / Core Syntax

• Resolved: Whenever error-recovery closes open blocks, urls, strings, functions, brackets, etc., it implies the minimal tokens to close those constructs.
• Resolved: \[EOF] turns into U+FFFD except when inside a string, in which case it just gets dropped.
• Resolved: Clarify that badstring and baduri make @supports rules invalid.
• Resolved: !important allowed in @supports
• Resolved: Publish CR with updates for CSS3 Conditional Rules.

• Discussed @charset handling and removing unused encodings. Conclusion to leave in issue and ask for feedback whether to add additional encoding patterns.
• Resolved: Charset propagation from linking document is same-origin. Leave issue open until we’re more sure of this being stable.
• Resolved: NUL gets turned into replacement char U+FFFD.
• Confirmed that non-ascii is updated to include all non-ASCII chars.
• Resolved: loosen the rules describing the way comments are serialized
• “Safe but pointless” change to UNICODE-RANGE token was discussed. No resolution recorded.
• Reviewed addition of attribute-matching tokens for reducing lookahead.
• Reviewed addition of COMMA token.
• Reviewed change to NUMBER token (to include sign).
• Reviewed change to bracket-matching of url() notations.
• dbaron asked whether CDO/CDC were correctly fixed. No response was recorded in the minutes.
• Resolved: Escaping in An+B notation falls out of tokenization rules. (Isn’t specialized for An+B.)
• Syntax is missing section that actually defines interpreting CSS syntax into style rules, at rules, etc.
• Resolved: Add Simon Sapin as co-editor.

Full minutes: Part I, Part II

Variables

• Resolved: Can’t put unmatched ) ] }, badstring, badurl, top-level ; into variables

Full minutes

Media Queries and Misc

• Resolved: Media Aueries requires white space on both sides of a conjunction keyword.
• Resolved: Clarify in grammar that idents followed by open parenthesis must have white space between the two unless it’s a function. (I.e. use S+ instead of S*.)
• Resolved: String and URL types for attr() literally takes the attribute’s value without parsing; CSS escapes are not interpreted.

Full minutes

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