Limited Availability WebAssembly

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.

Baseline Status: This feature is currently Limited (not yet Baseline). Latest engine implementation shipped on Jan 7, 2025.

Desktop Browser Engine Support

Google Chrome

130

Supported

Mozilla Firefox

134

Supported

Apple Safari

—

Unsupported

Microsoft Edge

130

Supported

Mobile Browser Engine Support

Chrome Android

130

Firefox Android

134

Safari iOS

—

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

webassembly.api.Module.Module.compile_options ↗ webassembly.api.compileStreaming_static.compile_options ↗ webassembly.api.compile_static.compile_options ↗ webassembly.api.instantiateStreaming_static.compile_options ↗ webassembly.api.instantiate_static.compile_options ↗ webassembly.api.validate_static.compile_options ↗ webassembly.jsStringBuiltins ↗