web-feature: Content Index

The Content Index API allows developers to register their offline enabled content with the browser.

WKWebView

macOS

*

iOS

*

Android WebView

Android

*

WebView2

Windows

*

WPE MiniBrowser

Linux

2026-09

Servo

Android

2026-09

ArkWeb

HarmonyOS

*

Chrome Browser

Android

84

Safari Browser

iOS

*