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Web Platform Baseline Status Breakdown Total Features: 1191
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Showing 5 of 5 features

Limited Availability

5 features
• In Progress / Not Yet Baseline

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.

Chrome 137
Firefox 153
Safari
Edge 137
Status: Incomplete cross-engine support

Instructions accept 64-bit memory indexes.

Chrome 133
Firefox 134
Safari
Edge 133
Status: Incomplete cross-engine support

A single module in WebAssembly can have multiple memories.

Chrome 120
Firefox 125
Safari
Edge 120
Status: Incomplete cross-engine support

Relaxed SIMD (Single Instruction Multiple Data) introduces local non-determinism, where the results of the instructions may vary based on hardware support.

Chrome 114
Firefox 146
Safari
Edge 114
Status: Incomplete cross-engine support

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

Chrome 130
Firefox 134
Safari
Edge 130
Status: Incomplete cross-engine support