Web platform features explorer - Custom highlights

Web platform features explorer

Custom highlights style arbitrary text ranges, without adding extra elements to the DOM.

Status

Limited availability

MDN documentation

CSS Custom Highlight API

Specifications

CSS Custom Highlight API Module Level 1, from Cascading Style Sheets (CSS) Working Group (W3C).

Browser support

Chrome 105 Released on 2022-09-02
Chrome Android 105 Released on 2022-09-02
Edge 105 Released on 2022-09-01
Firefox ❌ Vendor position : positive
Firefox for Android ❌ Vendor position : positive
Safari 17.2 Released on 2023-12-11
Safari on iOS 17.2 Released on 2023-12-11

Baseline availability blocked since December 2023 by Firefox (19 months)

Developer signals

State of HTML 2024: features/all_features question
State of HTML 2024: content/content_features question

Usage (according to Chrome Platform Status)

~0.017% of page loads. More data at chromestatus.

Web Platform Tests (WPT)

View the latest WPT test results for this feature

View as JSON | Edit this feature | Report an issue | Web-features entry: source, dist