1471736 - Forwards-compatible parsing of @font-face src descriptor: split on commas, discard invalid parts rather than entire descriptor

Status: RESOLVED DUPLICATE of bug 1803760

(Core :: CSS Parsing and Computation, enhancement, P2)

Description

[fantasai]

Attachment: testcase (requires Ahem)

In light of discussions for extending the format() descriptor to handle features (e.g. colors, variations) within a particular font format, the CSSWG recently resolved to update the parsing rules for @font-face's src descriptor to be more forwards-compatible, using Media Queries style parsing rules to split on top-level commas, and discard only the invalid items in the src list rather than throwing out the entire descriptor.

https://github.com/w3c/csswg-drafts/issues/633

I think this is an important change to implement even before the new features are implemented, as it means Firefox will be forwards-compatible with content authored using new format() features, whatever they end up being.

Comment 1

[Jonathan Kew [:jfkthame]]

Sorry, I overlooked this report and filed a new bug 1803760 with a patch for this. Duping this forward to the new bug.