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Firefox 150 adds CSS namespaced attributes behind pref #29482

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Firefox 150 adds CSS namespaced attributes behind pref #29482

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cb9013c
added data for namespaced attributes in attr
dletorey Apr 14, 2026
dc6c8a8
changed order
dletorey Apr 14, 2026
9c6f5b5
Merge branch 'main' into 43556-namespaced-attributes-in-attr
dletorey Apr 14, 2026
35549be
Merge branch 'main' into 43556-namespaced-attributes-in-attr
dletorey Apr 15, 2026
a470d70
Update css/types/attr.json
dletorey Apr 17, 2026
fc1d0ef
Update css/types/attr.json
dletorey Apr 17, 2026
76bf048
Update css/types/attr.json
dletorey Apr 17, 2026
65c4bd0
Merge branch 'main' into 43556-namespaced-attributes-in-attr
dletorey Apr 17, 2026
547ddaa
Merge branch 'main' into 43556-namespaced-attributes-in-attr
dletorey Apr 20, 2026
37c26dc
reordered and added imp_urls
dletorey Apr 20, 2026
51f6672
corrected the spelling of imp_url
dletorey Apr 20, 2026
b689318
shortened the urls
dletorey Apr 20, 2026
37ac36d
reset imp_url to impl_url
dletorey Apr 20, 2026
f92bfbd
corrected the other impl_urls
dletorey Apr 20, 2026
6e586b8
Merge branch 'main' into 43556-namespaced-attributes-in-attr
dletorey Apr 20, 2026
771908f
Merge branch 'main' into 43556-namespaced-attributes-in-attr
dletorey Apr 21, 2026
5f6b53d
Merge branch 'main' into 43556-namespaced-attributes-in-attr
dletorey Apr 21, 2026
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42 changes: 42 additions & 0 deletions css/types/attr.json
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Original file line number Diff line number Diff line change
Expand Up @@ -80,6 +80,48 @@
}
}
},
"namespaces": {
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"__compat": {
"description": "namespaced attributes",
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"spec_url": "https://drafts.csswg.org/css-values-5/#typedef-attr-name",
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"tags": [
"web-features:attr"
],
"support": {
"chrome": {
"version_added": false
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},
"chrome_android": "mirror",
"edge": "mirror",
"firefox": {
"version_added": "150",
"flags": [
{
"type": "preference",
"name": "layout.css.attr.enabled",
"value_to_set": "true"
}
]
},
"firefox_android": "mirror",
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": false
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},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": true,
"deprecated": false
}
}
},
"type_function": {
"__compat": {
"description": "`type(<syntax>)` function",
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