An enthusiastic LGTM1 from your friends at MSFT; we're excited to try this in our apps, and looking forward to providing OT feedback.
On Thursday, March 26, 2026 at 11:05:06 PM UTC-7 [email protected] wrote: > Contact emails > > [email protected] > > Explainer > > > https://github.com/WICG/nav-speculation/blob/main/prerendering-cross-origin-iframes.md > > Specification > > https://wicg.github.io/nav-speculation/prerendering.html > > Summary > > Prerenders cross-origin iframes with an opt-in response header. Browsers > will now prerender all cross-origin frames if the top-level frame's HTTP > response includes the Supports-Loading-Mode: prerender-cross-origin-frames. > > Blink component > > Blink > <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%22> > > Web Feature ID > > speculation-rules > > TAG review > > https://github.com/w3ctag/design-reviews/issues/1207 > > TAG review status > > Not applicable > > Goals for experimentation > > Gather feedback from web authors who already are interested in this > feature. > > 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/1376) > > WebKit: No signal ( > https://github.com/WebKit/standards-positions/issues/636) > > Web developers: Positive Our partners show interests in having this > feature. > > Other signals: > > WebView application risks > > (This feature is not supported in WebView.) > > > Ongoing technical constraints > > No information provided > > Debuggability > > The cross-origin iframe prerendering should be debuggable as well as top > frame's one: > https://developer.chrome.com/docs/devtools/application/debugging-speculation-rules#prerender > > 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 (e.g., callback sequence) of the WebView. > > Is this feature fully tested by web-platform-tests > <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> > ? > > Yes > > Flag name on about://flags > > "prerender2-cross-origin-iframes" from M148 > > Finch feature name > > Prerender2CrossOriginIframes > > Requires code in //chrome? > > False > > Estimated milestones > > Origin trial desktop first 147 > > Origin trial desktop last 152 > > DevTrial on desktop 147 > > Origin trial Android first 147 > > Origin trial Android last 152 > > DevTrial on Android 147 > > > Link to entry on the Chrome Platform Status > > https://chromestatus.com/feature/5112398709129216?gate=5126116666900480 > > Links to previous Intent discussions > > Intent to Prototype: > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/68b670ba.050a0220.270bc4.0593.GAE%40google.com > > > This intent message was generated by Chrome Platform Status > <https://chromestatus.com/>. > > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/c3d8da79-8abc-4690-a173-bc01c5778282n%40chromium.org.
