web-feature: Idle detection

The IdleDetector API is used to notify a webpage of the user’s idle, active, and locked state.

WKWebView

macOS

*

iOS

*

Android WebView

Android

*

WebView2

Windows

*

WPE MiniBrowser

Linux

2026-09

Servo

Android

2026-09

ArkWeb

HarmonyOS

*

Chrome Browser

Android

94

Safari Browser

iOS

*