script: Implement deprecated CSSStyleSheet members (#36313)

Implements `rules`, `addRule()` and `removeRule()` for `CSSStyleSheet`.
https://drafts.csswg.org/cssom/#legacy-css-style-sheet-members

This is part of #36162

Testing:
- `/css/css-cascade/at-scope-parsing.html`
- `/css/css-conditional/at-supports-whitespace.html`
- `/css/css-nesting/invalidation-004.html`
- `/css/css-nesting/parsing.html`
- `/css/css-nesting/serialize-group-rules-with-decls.html`
- `/css/css-syntax/custom-property-rule-ambiguity.html`
- `/css/css-syntax/invalid-nested-rules.html`
- `/css/css-syntax/trailing-braces.html`
- `/css/css-syntax/var-with-blocks.html`
- `/css/css-transitions/parsing/starting-style-parsing.html`
- `/css/cssom/CSSStyleSheet.html`
- `/css/cssom/idlharness.html`
- `/css/cssom/insertRule-across-context.html`

Signed-off-by: Oriol Brufau <obrufau@igalia.com>
This commit is contained in:
Oriol Brufau 2025-04-03 08:56:47 -07:00 committed by GitHub
parent 9d6e1f67fb
commit f29c182929
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15 changed files with 57 additions and 309 deletions

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@ -1,15 +1,3 @@
[starting-style-parsing.html]
[@starting-style is valid]
expected: FAIL
[@starting-style div is not valid]
expected: FAIL
[@starting-style () is not valid]
expected: FAIL
[@starting-style ( {} is not valid]
expected: FAIL
[@starting-style } is not valid]
expected: FAIL