🏠 New in Low Baseline Support: JavaScript promise integration (WebAssembly)

September 14, 2026

caniuse · mdn · spec

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.

Source features

• webassembly.jspi [mdn]