web-feature: :root

Widely available

The :root pseudo-class matches the root element of the document, usually the <html> element.

WKWebView

macOS

*

iOS

*

Android WebView

Android

*

WebView2

Windows

*

WPE MiniBrowser

Linux

2026-07

Servo

Android

2026-07

ArkWeb

HarmonyOS

*

Chrome Browser

Android

18

Safari Browser

iOS

1