web-feature: :focus-within

Widely available

The :focus-within CSS pseudo-class matches an element if the element or any of its children are focused.

WKWebView

macOS

*

iOS

*

Android WebView

Android

*

WebView2

Windows

*

WPE MiniBrowser

Linux

2026-05

Servo

Android

2026-05

Chrome Browser

Android

60

Safari Browser

iOS

10.3