Contact emails
[email protected]

Explainer
https://github.com/WICG/nav-speculation/blob/main/prerendering-form-submission.md


Specification
https://storage.googleapis.com/spec-previews/WICG/nav-speculation/pull/426/diff/prerendering.html


Design docs

https://docs.google.com/document/d/13Xr_kSYZtvhRNaKpCiP7wLKYtDcpLdDWSH4y6gHq0kQ/edit?usp=sharing


Summary
This extends speculation rules syntax to allow developers to specify the 
form_submission field for prerender. This field directs the browser to prepare 
the prerender as a form submission, so that it can be activated by real form 
submission navigations. Examples include a simple search form which results in 
a /search?q=XXX GET request navigation, support of which has been requested by 
web developers.


Blink component
Internals>Preload>Prerender


Web Feature ID
speculation-rules


TAG review
https://github.com/w3ctag/design-reviews/issues/1192


TAG review status
Issues open


Risks




Interoperability and Compatibility
The entire speculative loading feature is a progressive enhancement, so in 
general risks are low in this area.

Gecko: No signal (https://github.com/mozilla/standards-positions/issues/1355)

WebKit: No signal (https://github.com/WebKit/standards-positions/issues/614)

Web developers: No signals

Other signals:


Ergonomics
No


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?
No information provided



Goals for experimentation
No information provided


Ongoing technical constraints
No information provided


Debuggability
As well as other speculationrule features, this feature can be viewed on 
devtools as the source script. Another dedicated field will be added to the 
panel for easier debugging.


Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, 
ChromeOS, Android, and Android WebView)?
No
Windows, Mac, Linux, ChromeOS, Android. WebView doesn't support speculation 
rules prerendering because prerendering navigation breaks the lifecycle (eg, 
callback sequence) of the WebView.


Is this feature fully tested by web-platform-tests?
Yes



Flag name on about://flags
PrerenderActivationByFormSubmission


Finch feature name
PrerenderActivationByFormSubmission


Requires code in //chrome?
False


Tracking bug
https://issues.chromium.org/issues/346555939


Measurement
Blink.UseCounter.Features https://crrev.com/c/7533307


Estimated milestones


Origin trial desktop first 146

Origin trial desktop last 151

DevTrial on desktop 146

Origin trial Android first 146

Origin trial Android last 151

DevTrial on Android 146




Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5074313831120896?gate=5966135017209856


Links to previous Intent discussions
Intent to Prototype: 
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/698f0243.2b0a0220.19817b.0194.GAE%40google.com



This intent message was generated by Chrome Platform Status.

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