web-feature: Classes

Widely available

Classes are an object-oriented syntax for JavaScript prototypes.

WKWebView

macOS

*

iOS

*

Android WebView

Android

*

WebView2

Windows

*

WPE MiniBrowser

Linux

2026-10

Servo

Android

2026-10

ArkWeb

HarmonyOS

*

Chrome Browser

Android

42

Safari Browser

iOS

9