web-feature: String builtins (WebAssembly)

The WebAssembly builtin string functions mirror a subset of the JavaScript String API and adapt it to be efficiently callable without JavaScript glue code.

WKWebView

macOS

*

iOS

*

Android WebView

Android

*

WebView2

Windows

*

Chrome Browser

Android

130

Safari Browser

iOS

*

Notes

Support data provided by: BCD logo

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This feature was last updated on November 15, 2025.