Ready for Developer Testing: Renewed HTML insertion&streaming methods

[Chromestatus]

Contact emails

nrose...@chromium.org, foo...@chromium.org

Explainer

https://github.com/WICG/declarative-partial-updates/blob/main/dynamic-markup-revamped-explainer.md

Specification

https://github.com/WICG/declarative-partial-updates/blob/main/dynamic-markup-revamped-explainer.md#resulting-api

Summary

Expose multiple HTML setting methods that provide a coherent story for dynamically inserting markup into an existing document. - Positional methods (before/after/append/prepend/replaceWith) that take HTML as argument, effectively replacing insertAdjacentHTML. - Streaming methods (stream{Append}HTML{Unsafe}) which return a WritableStream - Sending {runScripts} as part of SetHTMLUnsafeOptions, mimicking createContextualFragment behavior. - Supporting createParserOptions in trusted types, allowing trusted types to override scripting mode and sanitizer.

Blink component

Blink>HTML>Parser

Web Feature ID

domparser

Goals for experimentation

None

Risks

Interoperability and Compatibility

No information provided

Gecko: No signal (https://github.com/mozilla/standards-positions/issues/1370)

WebKit: No signal (https://github.com/WebKit/standards-positions/issues/629)

Web developers: Positive (https://github.com/whatwg/html/issues/2142) See also https://github.com/whatwg/html/issues/10122

Other signals:

Security

Since this is about dynamic markup insertion, XSS needs to be carefully handled, and specifically integration with the sanitizer and trusted types. This has been a major design consideration.

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

Debuggability

No information provided

Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?

Yes

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

Yes
https://wpt.fyi/results/domparsing/tentative?label=master&label=experimental&aligned

Flag name on about://flags

No information provided

Finch feature name

NewHTMLSettingMethods

Requires code in //chrome?

False

Tracking bug

https://issues.chromium.org/issues/491743369

Estimated milestones

DevTrial on desktop	148
DevTrial on Android	148

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5054329641893888

This intent message was generated by Chrome Platform Status.