JavaScript promise integration (WebAssembly)

The JavaScript promise integration (JSPI) suspends a WebAssembly module when it calls a JavaScript method that returns a promise. The module resumes when the promise is resolved. You can use this to call asynchronous Web APIs from synchronous WebAssembly.

Baseline Status: This feature is currently Limited and is missing in at least one major browser engine.

Desktop Browser Engine Support

Google Chrome

137

Supported

Mozilla Firefox

153

Supported

Apple Safari

—

Unsupported

Microsoft Edge

137

Supported

Mobile Browser Engine Support

Chrome Android

137

Firefox Android

153

Safari iOS

—

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

webassembly.jspi ↗