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Add HTML link element attribute values as="{json,script,style}" for modulepreload #29048

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Add HTML link element attribute values as="{json,script,style}" for modulepreload #29048

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1b802a8
Initial commit
KurtCattiSchmidt Feb 13, 2026
55548b5
Adding Safari 26 to support JSON module preloads
KurtCattiSchmidt Feb 13, 2026
88b2561
Updating Safari JSON suport to 26.2
KurtCattiSchmidt Feb 13, 2026
33a7eb2
Adding mdn_url and spec_url
KurtCattiSchmidt Feb 18, 2026
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99 changes: 99 additions & 0 deletions html/elements/link.json
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Original file line number Diff line number Diff line change
Expand Up @@ -1000,6 +1000,105 @@
"standard_track": true,
"deprecated": false
}
},
"as-json": {
"__compat": {
"description": "`as=json`",
"mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Attributes/rel/modulepreload",
"spec_url": "https://html.spec.whatwg.org/multipage/links.html#module-preload-destination",
"support": {
"chrome": {
"version_added": "147"
},
"chrome_android": "mirror",
"edge": "mirror",
"firefox": {
"version_added": false
},
"firefox_android": "mirror",
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": "26.2"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": true,
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@caugner caugner Feb 18, 2026

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Setting standard_track: true requires providing a spec_url.

In this case, we can to link to https://html.spec.whatwg.org/multipage/links.html#preload-destination for all values.

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@KurtCattiSchmidt KurtCattiSchmidt Feb 18, 2026

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Thanks, added. The URL for this is slightly different, it's https://html.spec.whatwg.org/multipage/links.html#module-preload-destination

I also added the MDN link - is that actually necessary given the modulepreload MDN link in the parent?

"deprecated": false
}
}
},
"as-script": {
"__compat": {
"description": "`as=script`",
"mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Attributes/rel/modulepreload",
"spec_url": "https://html.spec.whatwg.org/multipage/links.html#module-preload-destination",
"support": {
"chrome": {
"version_added": "66"
},
"chrome_android": "mirror",
"edge": "mirror",
"firefox": {
"version_added": "115"
},
"firefox_android": "mirror",
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": "17"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": false,
"standard_track": true,
"deprecated": false
}
}
},
"as-style": {
"__compat": {
"description": "`as=style`",
"mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Attributes/rel/modulepreload",
"spec_url": "https://html.spec.whatwg.org/multipage/links.html#module-preload-destination",
"support": {
"chrome": {
"version_added": "147"
},
"chrome_android": "mirror",
"edge": "mirror",
"firefox": {
"version_added": false
},
"firefox_android": "mirror",
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": false
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": true,
"deprecated": false
}
}
}
},
"preconnect": {
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