Contact emailsrobert...@chromium.org, dome...@chromium.org Explainer https://github.com/WICG/nav-speculation/blob/main/speculation-rules-tags.md
SpecificationNone yet, but we'll be writing one during the prototype phase Summary This enables developers to add tag field to speculation rules. This optional field can be used to track the source of speculation rules, e.g. to treat them differently at an intermediary server. Any tags associated with a speculation will be sent with the Sec-Speculation-Tags header. Blink componentInternals>Preload <https://issues.chromium.org/issues?q=customfield1222907:%22Internals%3EPreload%22> Motivation There may be multiple parties on a single referring page which are setting up speculation rules, e.g. CDNs, frameworks, or individual pages. It can be useful for server code to respond differently to speculative navigation requests, depending on which source triggered them. Today, there is no way for servers to perform this kind of differentiation. All speculative navigation requests appear the same to the server. This feature provides such a mechanism. Initial public proposalhttps://github.com/WICG/nav-speculation/issues/336 Search tagsspeculationrules <https://chromestatus.com/features#tags:speculationrules>, prerendering <https://chromestatus.com/features#tags:prerendering>, prefetch <https://chromestatus.com/features#tags:prefetch> TAG reviewhttps://github.com/w3ctag/design-reviews/issues/721 The TAG is generally dissatisfied with speculation rules, claiming that the syntax is too complicated. As such, we don't believe asking for review of this additional feature would be fruitful. TAG review statusNot applicable 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/1172) Mozilla is neutral on speculation rules syntax in general ( https://github.com/mozilla/standards-positions/issues/620), although positive on prefetching. We opened a new request for this specific feature to ensure we captured any of their input. *WebKit*: No signal (https://github.com/WebKit/standards-positions/issues/54) WebKit has not yet responded to our 2022 request for a position on speculation rules in general. We have updated the thread to point them to this latest addition anyway. *Web developers*: Positive ( https://github.com/WICG/nav-speculation/blob/main/speculation-rules-tags.md#stakeholder-feedback ) *Other signals*: Activation Due to how new fields in speculation rules are interpreted in older versions of Chrome, using this field on the rule level can cause the rules to be dropped. A workaround is using it on the ruleset level only during this transition period. https://github.com/WICG/nav-speculation/blob/main/speculation-rules-tags.md#location-of-the-tags-within-the-json 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 We would like to use the presence of ruleset-level tags to improve DevTools's existing display of speculation rules rulesets: https://issues.chromium.org/issues/393408589 Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> ?Not yet, but we plan on doing so during the prototyping phase Flag name on about://flagsNone Finch feature nameSpeculationRulesTag Requires code in //chrome?False Tracking bughttps://issues.chromium.org/issues/381687257 Estimated milestones No milestones specified Link to entry on the Chrome Platform Status https://chromestatus.com/feature/6503137340555264?gate=6399349724282880 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 blink-dev+unsubscr...@chromium.org. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAM0wra8a%2B4uVDq1V1ZvrkUj9Jg3tbnbnqNXfeHhxZSSMj1mXVg%40mail.gmail.com.
