+1; great news on the streaming front. On the potential attribute name change, is it not possible to introduce streaming behaviour under the old name?
Best, Alex On Tuesday, December 6, 2022 at 10:24:20 PM UTC-8 yoav...@chromium.org wrote: > Great news!! :) > > On Tue, Dec 6, 2022 at 7:05 PM Mason Freed <mas...@chromium.org> wrote: > >> Contact emailsmason...@google.com >> >> Explainerhttps://github.com/whatwg/html/pull/5465 >> https://github.com/whatwg/dom/pull/892 >> >> Specificationhttps://github.com/whatwg/html/pull/5465 >> >> Summary >> >> Chromium has shipped [1] a version of declarative shadow DOM in M90 which >> currently has 0.002% usage [2]. Mostly, that low usage is due to the spec >> PR being stalled with no input from other implementers. Recently, there has >> been renewed interest in the feature, and discussions have resumed. As part >> of those discussions, two changes are being requested: 1. Rename the >> `<template>` attribute from `shadowroot` to `shadowrootmode`. 2. Support >> streaming, by attaching the shadow root on the opening, rather than the >> closing, template tag. Chromium would like to prototype these changes. [1] >> https://chromestatus.com/feature/5191745052606464 [2] >> https://chromestatus.com/metrics/feature/timeline/popularity/3196 >> >> >> Blink componentBlink>DOM>ShadowDOM >> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EDOM%3EShadowDOM> >> >> Motivation >> >> Developers have always wanted declarative shadow DOM to support >> streaming, but other implementers were always opposed to making the >> required changes to the HTML parser. Recently, those concerns were changed, >> and other implementations proceeded with a streaming prototype. >> >> >> Initial public proposal >> >> Search tagsdeclarative >> <https://chromestatus.com/features#tags:declarative>, shadow >> <https://chromestatus.com/features#tags:shadow> >> >> TAG review >> >> TAG review statusNot applicable >> >> Risks >> >> >> Interoperability and Compatibility >> >> The new version of declarative shadow DOM has observable differences in >> behavior. The plan for prototyping the new approach while keeping the >> functionality of the old approach is to trigger the new streaming behavior >> based on the presence of the new attribute `shadowrootmode`. If the (old) >> `shadowroot` attribute is used, the old non-streaming behavior will be >> used. This should ensure there are no compat risks, as we transition to the >> new behavior. Eventually, the plan would be to deprecate the old >> non-streaming behavior and `shadowroot` attribute. >> >> >> *Gecko*: Positive ( >> https://github.com/whatwg/html/pull/5465#pullrequestreview-1132523065) >> >> *WebKit*: Positive ( >> https://github.com/whatwg/html/pull/5465#pullrequestreview-1132523065) >> >> *Web developers*: Positive (https://github.com/whatwg/dom/issues/831) >> Search "streaming" on the issue discussion and you'll find many supportive >> comments. >> >> *Other signals*: >> >> Ergonomics >> >> No difference from existing, shipped declarative shadow DOM >> implementation. >> >> >> Activation >> >> No difference from existing, shipped declarative shadow DOM >> implementation. >> >> >> Security >> >> No difference from existing, shipped declarative shadow DOM >> implementation. >> >> >> 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? >> >> >> >> Debuggability >> >> No difference from existing, shipped declarative shadow DOM >> implementation. >> >> >> Is this feature fully tested by web-platform-tests >> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> >> ?Yes >> >> Flag nameStreamingDeclarativeShadowDOM >> >> Requires code in //chrome?False >> >> Tracking bughttps://crbug.com/1379513 >> >> Estimated milestones >> >> No milestones specified >> >> >> Link to entry on the Chrome Platform Status >> https://chromestatus.com/feature/5161240576393216 >> >> 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+...@chromium.org. >> To view this discussion on the web visit >> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAM%3DNeDg1Aa7f5j3Kbqag_QwWYpLhAqwkDo0Sv1Xt5mtPCpmkBw%40mail.gmail.com >> >> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAM%3DNeDg1Aa7f5j3Kbqag_QwWYpLhAqwkDo0Sv1Xt5mtPCpmkBw%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- 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 on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/5a85dda4-009a-4f93-a3ac-a2045987f5cfn%40chromium.org.
