(Feature-collaborator hat on, API owners hat off.)

Thanks for sending this! A few minor corrections here, that it'd be good to
make to the ChromeStatus entry.

On Wed, May 21, 2025 at 10:42 AM Chromestatus <
ad...@cr-status.appspotmail.com> wrote:

> Contact emails steven...@microsoft.com
>
> Explainer
> https://github.com/WICG/nav-speculation/blob/main/clear-site-data-integration.md
>
> Specification
> https://chromium-review.googlesource.com/c/chromium/src/+/6456388


This is not a specification, but instead a Chromium CL. You can link to
https://wicg.github.io/nav-speculation/prefetch.html#clear-site-data-patches
and
https://wicg.github.io/nav-speculation/prerendering.html#interaction-with-clear-site-data
for the specification.


>
>
> Summary
>
> We propose adding two new values to the Clear-Site-Data header to help
> developers target clearing the prerender and prefetch cache:
> “prefetchCache” and “prerenderCache”.
>
>
> Blink component Blink>Loader>Preload
> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ELoader%3EPreload%22>
>
> TAG review https://github.com/w3ctag/design-reviews/issues/1091
>
> TAG review status Pending
>
> Risks
>
>
> Interoperability and Compatibility
>
> None
>
>
> *Gecko*: Positive (
> https://github.com/mozilla/standards-positions/issues/1214)
>
> *WebKit*: No signal (
> https://github.com/WebKit/standards-positions/issues/488)
>
> *Web developers*: No signals
>

We have positive signals from engineers at Shopify at
https://github.com/WICG/nav-speculation/issues/357#issuecomment-2766677746
, as well as a separate engineer (*using* Shopify) at
https://github.com/WICG/nav-speculation/issues/352 .


>
>
> *Other signals*:
>
> WebView application risks
>
> Does this intent deprecate or change behavior of existing APIs, such that
> it has potentially high risk for Android WebView-based applications?
>
> None
>
>
> Debuggability
>
> None
>
>
> Will this feature be supported on all six Blink platforms (Windows, Mac,
> Linux, ChromeOS, Android, and Android WebView)? No


It's good to explain the reason here. The reason is that speculation rules
prefetch and prerender is not yet supported on Android WebView.


>
>
> Is this feature fully tested by web-platform-tests
> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
> ? No
>
> Adding tests.
>

I think you already added the tests in
https://chromium-review.googlesource.com/c/chromium/src/+/6456388 , and
they're now visible at
https://wpt.fyi/results/speculation-rules?label=master&label=experimental&aligned&q=clear-site-data
.


>
>
> Flag name on about://flags ClearSiteDataPrefetchPrerenderCache


This is actually the Finch feature name. We don't have any flag name on
about://flags.


>
>
> Finch feature name None
>
> Non-finch justification None
>
> Rollout plan Will ship enabled for all users
>
> Requires code in //chrome? False
>
> Tracking bug https://issues.chromium.org/issues/398149359
>
> Estimated milestones
>
> No milestones specified
>

I think we're targeting 138.


>
>
> Anticipated spec changes
>
> Open questions about a feature may be a source of future web compat or
> interop issues. Please list open issues (e.g. links to known github issues
> in the project for the feature specification) whose resolution may
> introduce web compat/interop risk (e.g., changing to naming or structure of
> the API in a non-backward-compatible way).
> None
>
> Link to entry on the Chrome Platform Status
> https://chromestatus.com/feature/4755745652080640?gate=5143125462614016
>
> Links to previous Intent discussions Intent to Prototype:
> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/680bb74f.170a0220.15e62e.053b.GAE%40google.com
>
>
> This intent message was generated by Chrome Platform Status
> <https://chromestatus.com>.
>
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>

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