Web features explorer

String builtins (WebAssembly)

Limited availability

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

Browser support

  • Chrome 130 Released on 2024-10-15
  • Chrome Android 130 Released on 2024-10-15
  • Edge 130 Released on 2024-10-17
  • Firefox 134 Released on 2025-01-07
  • Firefox for Android 134 Released on 2025-01-07
  • Safari Not supported
  • Safari on iOS Not supported

Baseline availability blocked since January 2025 by Safari (18 months)

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MDN documentation

No MDN documentation found. You can search for the feature on MDN. If you believe that MDN has no documentation about this feature, you can open an issue on MDN's GitHub repository.

Specifications

Usage (according to Chrome Platform Status)

~0.277% of page loads. More data at chromestatus.com.

Web Platform Tests (WPT)

View the latest WPT test results for this feature

Interop

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