web-feature: String includes()

baseline logo Widely available

The includes() method of strings returns whether a search string appears within the string.

WKWebView

macOS

*

iOS

*

Android WebView

Android

*

WebView2

Windows

*

WPE MiniBrowser

Linux

2026-09

Servo

Android

2026-09

ArkWeb

HarmonyOS

*

Chrome Browser

Android

41

Safari Browser

iOS

9