Web platform features explorer - outline

Web platform features explorer

The outline CSS shorthand sets the color, style, and width of a line around an element, outside of the border.

Status

Baseline Widely Available (since 2025-09-27)

MDN documentation

outline

Specifications

CSS Basic User Interface Module Level 4 (#outline), from Cascading Style Sheets (CSS) Working Group (W3C).

Browser support

Chrome 94 Released on 2021-09-21
Chrome Android 94 Released on 2021-09-21
Edge 94 Released on 2021-09-24
Firefox 88 Released on 2021-04-19
Firefox for Android 88 Released on 2021-04-19
Safari 16.4 Released on 2023-03-27
Safari on iOS 16.4 Released on 2023-03-27

Usage (according to Chrome Platform Status)

~78.434% of page loads. More data at chromestatus.com.

Web Platform Tests (WPT)

View the latest WPT test results for this feature

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