[csswg-drafts] Pull Request: [css-font-loading-3] FontFaceSet.clear() should not clear CSS-connected items

litherum has just submitted a new pull request for https://github.com/w3c/csswg-drafts:

== [css-font-loading-3] FontFaceSet.clear() should not clear CSS-connected items ==
The spec says in https://drafts.csswg.org/css-font-loading-3/#document-font-face-set:

> The set entries for a document’s font source must be initially populated with all the CSS-connected FontFace objects from all of the CSS @font-face rules.

And in https://drafts.csswg.org/css-font-loading-3/#font-face-css-connection

> There is a two-way connection between [FontFace objects and @font-face rules]: any change made to a @font-face descriptor is immediately reflected in the corresponding FontFace attribute, and vice versa.

And, finally, in https://drafts.csswg.org/css-font-loading-3/#dom-fontfaceset-clear

> Remove all items from the FontFaceSet’s set entries.

It seems like clear() shouldn't delete CSS-connected FontFaces. This is also what Firefox and Chrome both do. I'm updating WebKit to do this in https://bugs.webkit.org/show_bug.cgi?id=229643.



See https://github.com/w3c/csswg-drafts/pull/6553


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