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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 Web Feature ID Missing feature TAG review https://github.com/w3ctag/design-reviews/issues/1207 TAG review status Not applicable Origin Trial Name Prerendering cross-origin iframes Goals for experimentation Gather feedback from web authors who already are interested in this feature. Chromium Trial Name Prerender2CrossOriginIframes Origin Trial documentation link https://github.com/WICG/nav-speculation/blob/main/prerendering-cross-origin-iframes.md WebFeature UseCounter name kPrerender2CrossOriginIframes 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 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 Reason this experiment is being extended Partner requires additional implementation and assessment about the nested frames case. 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 Is this feature fully tested by web-platform-tests? Yes Flag name on about://flags "prerender2-cross-origin-iframes" from M148 Finch feature name Prerender2CrossOriginIframes Requires code in //chrome? False Tracking bug https://issues.chromium.org/issues/440387014 Estimated milestones Origin trial desktop first 147 Origin trial desktop last 152 Origin trial extension 1 end milestone 158 Link to entry on the Chrome Platform Status https://chromestatus.com/feature/5112398709129216?gate=5151856880910336 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 Intent to Experiment: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAAEV3p%3DzhNhfOpe8x%3DRKgxYFS9GCq_q-c8knZYRBRuijQ27o8w%40mail.gmail.com This intent message was generated by Chrome Platform Status. -- 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/6a45fcf5.198129d7.1d0cd0.0014.GAE%40google.com.
