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Web Platform Baseline Status Breakdown Total Features: 1219
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Showing 6 of 6 features

2026

2 features
• September 2026

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 27
Edge 137
Baseline Date: Sep 14, 2026
• February 2026

Branch hints in WebAssembly allows a browser to optimize performance when a branch is a likely to take a specific path.

Chrome 137
Firefox 148
Safari 16
Edge 137
Baseline Date: Feb 24, 2026

2025

1 features
• May 2025

When caught, an exception is reified into an exception reference, a value of the new type exnref.

Chrome 137
Firefox 131
Safari 18.4
Edge 137
Baseline Date: May 29, 2025

2024

3 features
• December 2024

Garbage collection tracks references for better memory management with garbage-collected languages running in WebAssmbly.

Chrome 119
Firefox 120
Safari 18.2
Edge 119
Baseline Date: Dec 11, 2024

Tail call optimization discards a caller frame and replaces the call with a jump instruction.

Chrome 112
Firefox 121
Safari 18.2
Edge 112
Baseline Date: Dec 11, 2024
• September 2024

A typed function reference can be called directly.

Chrome 119
Firefox 120
Safari 18
Edge 119
Baseline Date: Sep 16, 2024