Intent to prototype: CSS Custom Highlight API

[Jan-Niklas Jäschke]

Summary:

Custom Highlight API provides a mechanism for styling arbitrary ranges of a document identified by script. It is currently being developed behind the pref dom.customHighlightAPI.enabled.

MDN page: https://developer.mozilla.org/en-US/docs/Web/API/CSS_Custom_Highlight_API

Meta-Bug: https://bugzil.la/1703961 

Specification: https://drafts.csswg.org/css-highlight-api-1

Standards Body: W3C

Platforms: all

Web-platform-tests: https://wpt.live/css/css-highlight-api/

Standards-positions: https://github.com/mozilla/standards-positions/issues/482 

Other browsers:

 - Chrome: Available since v105 https://chromestatus.com/feature/5436441440026624 

 - Safari: https://bugs.webkit.org/show_bug.cgi?id=204903 

— Jan

[Jan-Niklas Jäschke]

Hi folks,

As of today, partial support for Custom Highlight API is enabled on Firefox Nightly (See Bug 1840818).

The implementation is not feature complete yet. In particular, these features are missing:

- spelling-error / grammar-error

- text-decorations / text shadow

- events

- support for getComputedStyle()

Cheers,

— Jan