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Update Speculation Rules data with specs and Webview support #27935

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Merged
caugner merged 14 commits into from
Sep 25, 2025
Merged

Update Speculation Rules data with specs and Webview support #27935

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3cce2cb
Update Speculation Rules data with specs and Webview support
tunetheweb Sep 19, 2025
80d4e85
Add Prerender spec
tunetheweb Sep 19, 2025
cd66ffb
Fix prerender spec URL
tunetheweb Sep 19, 2025
7b5a42a
Merge branch 'main' into speculation-rules-updates
tunetheweb Sep 19, 2025
ff7083a
More updates
tunetheweb Sep 19, 2025
b53b584
Merge branch 'speculation-rules-updates' of github.com:tunetheweb/bro…
tunetheweb Sep 19, 2025
3b85ccd
Review feedback
tunetheweb Sep 19, 2025
10e840f
Add Fenced Frame spec url
tunetheweb Sep 19, 2025
a940d9a
Add script spec urls
tunetheweb Sep 19, 2025
411e415
Better links
tunetheweb Sep 19, 2025
de6e9aa
Update http/headers/Supports-Loading-Mode.json
caugner Sep 19, 2025
87acea4
Update api/Request.json
caugner Sep 19, 2025
bc9b695
Spec URLs with fragments
tunetheweb Sep 19, 2025
2e50c7e
Merge branch 'main' into speculation-rules-updates
tunetheweb Sep 19, 2025
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3 changes: 2 additions & 1 deletion api/Document.json
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Original file line number Diff line number Diff line change
Expand Up @@ -6433,6 +6433,7 @@
"prerendering": {
"__compat": {
"mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/prerendering",
"spec_url": "https://wicg.github.io/nav-speculation/prerendering.html#dom-document-prerendering",
"tags": [
"web-features:speculation-rules"
],
Expand All @@ -6459,7 +6460,7 @@
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
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2 changes: 1 addition & 1 deletion api/PerformanceNavigationTiming.json
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Original file line number Diff line number Diff line change
Expand Up @@ -72,7 +72,7 @@
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
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2 changes: 1 addition & 1 deletion api/Request.json
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Original file line number Diff line number Diff line change
Expand Up @@ -1013,7 +1013,7 @@
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
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94 changes: 37 additions & 57 deletions html/elements/script.json
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Original file line number Diff line number Diff line change
Expand Up @@ -714,6 +714,7 @@
"__compat": {
"description": "`type=\"speculationrules\"`",
"mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules",
"spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#speculative-loading",
"tags": [
"web-features:speculation-rules"
],
Expand Down Expand Up @@ -753,14 +754,12 @@
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": {
"version_added": false
},
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
},
Expand Down Expand Up @@ -789,14 +788,12 @@
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": {
"version_added": false
},
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
Expand Down Expand Up @@ -834,14 +831,12 @@
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": {
"version_added": false
},
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
Expand All @@ -862,25 +857,25 @@
},
"edge": "mirror",
"firefox": {
"version_added": false
"version_added": false,
"impl_url": "https://bugzil.la/1969396"
},
"firefox_android": "mirror",
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": false
"version_added": false,
"impl_url": "https://webkit.org/b/295193"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": {
"version_added": false
},
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
Expand All @@ -889,6 +884,7 @@
"__compat": {
"description": "`prerender` key",
"mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules#prerender",
"spec_url": "https://wicg.github.io/nav-speculation/prerendering.html#speculation-rules",
"tags": [
"web-features:speculation-rules"
],
Expand All @@ -901,7 +897,8 @@
},
"edge": "mirror",
"firefox": {
"version_added": false
"version_added": false,
"impl_url": "https://bugzil.la/1969838"
},
"firefox_android": "mirror",
"oculus": "mirror",
Expand All @@ -913,13 +910,14 @@
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": {
"version_added": false
"version_added": false,
"impl_url": "https://crbug.com/41490450"
},
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
Expand Down Expand Up @@ -949,14 +947,12 @@
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": {
"version_added": false
},
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
Expand Down Expand Up @@ -986,14 +982,12 @@
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": {
"version_added": false
},
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
Expand Down Expand Up @@ -1025,14 +1019,12 @@
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": {
"version_added": false
},
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
},
Expand Down Expand Up @@ -1071,14 +1063,12 @@
"samsunginternet_android": {
"version_added": false
},
"webview_android": {
"version_added": false
},
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
Expand Down Expand Up @@ -1109,14 +1099,12 @@
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": {
"version_added": false
},
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
Expand Down Expand Up @@ -1146,14 +1134,12 @@
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": {
"version_added": false
},
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
Expand Down Expand Up @@ -1185,14 +1171,12 @@
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": {
"version_added": false
},
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
Expand Down Expand Up @@ -1223,14 +1207,12 @@
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": {
"version_added": false
},
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
Expand Down Expand Up @@ -1259,14 +1241,12 @@
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": {
"version_added": false
},
"webview_android": "mirror",
"webview_ios": "mirror"
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
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2 changes: 1 addition & 1 deletion http/headers/Content-Security-Policy.json
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Expand Up @@ -1028,7 +1028,7 @@
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
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@caugner caugner Sep 19, 2025

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Can we point to a spec where inline-speculation-rules is explicitly mentioned? If not, let's set this back to false for now:

Suggested change
"standard_track": true,
"standard_track": false,

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@tunetheweb tunetheweb Sep 19, 2025 •
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So there's a PR open for that but not merged yet (hence why I didn't add the spec URL yet):
w3c/webappsec-csp#776
They were in the old prefetch spec (which has since mostly been moved to HTML except for this piece).

So it was standard track in WICG, but is now moving to the actual, non-WICG standards (so also standard track) but is kind of in an in between state for now, but don't think that makes it non-standard. WDYT?

Happy to update this with the spec url once it is merged to CSP spec btw.

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@caugner caugner Sep 19, 2025

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Assuming that the PR will be merged soon, and knowing that you'll be following up, we can merge as is.

In the future, when we derive the standard_track automatically, a feature is not considered standard_track until it has landed in a spec (with good standing, as indicated by browser-specs).

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@tunetheweb tunetheweb Sep 19, 2025 •
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Thanks. As i say it was in a WICG spec (which was included in browser-specs). But that spec has been closed off now as it’s being moved to the actual standards.

My read of “standards track” is it’s on track to become a standard (which this is) even if not quite a standard yet.

But I appreciate having a real spec is the only real evidence of that as a PR can be rejected.

Bad timing with this PR. I should have updated this setting when it was in the old spec really as always was on the standards track.

Anyway, thanks for the latitude!

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@caugner caugner Sep 19, 2025

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(Gotcha, we removed these spec_urls in #27755.)

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@tunetheweb tunetheweb Sep 19, 2025

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Ahhhh and that’s what flipped this to non standard. I wondered as didn’t think this was marked as such in the past.

OK so all part of the fact we’re moving this!!

"deprecated": false
}
}
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2 changes: 1 addition & 1 deletion http/headers/Sec-Purpose.json
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Expand Up @@ -111,7 +111,7 @@
"webview_ios": "mirror"
},
"status": {
"experimental": false,
"experimental": true,
"standard_track": true,
"deprecated": false
}
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3 changes: 2 additions & 1 deletion http/headers/Sec-Speculation-Tags.json
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Expand Up @@ -4,6 +4,7 @@
"Sec-Speculation-Tags": {
"__compat": {
"mdn_url": "https://developer.mozilla.org/docs/Web/HTTP/Reference/Headers/Sec-Speculation-Tags",
"spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#the-sec-speculation-tags-header",
"tags": [
"web-features:speculation-rules"
],
Expand All @@ -30,7 +31,7 @@
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
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3 changes: 2 additions & 1 deletion http/headers/Speculation-Rules.json
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Expand Up @@ -4,6 +4,7 @@
"Speculation-Rules": {
"__compat": {
"mdn_url": "https://developer.mozilla.org/docs/Web/HTTP/Reference/Headers/Speculation-Rules",
"spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#the-speculation-rules-header",
"tags": [
"web-features:speculation-rules"
],
Expand All @@ -30,7 +31,7 @@
},
"status": {
"experimental": true,
"standard_track": false,
"standard_track": true,
"deprecated": false
}
}
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