Atomics.waitAsync()

The Atomics.waitAsync() static method waits for a value in a shared memory location, providing a promise when the expected value is not yet in memory. The waitAsync() method is a non-blocking alternative to Atomics.wait().

Baseline Status: Achieved Newly Available on Nov 11, 2025 across core engines.

Desktop Browser Engine Support

Google Chrome

90

Supported

Mozilla Firefox

145

Supported

Apple Safari

16.4

Supported

Microsoft Edge

90

Supported

Mobile Browser Engine Support

Chrome Android

90

Firefox Android

145

Safari iOS

16.4

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

javascript.builtins.Atomics.waitAsync ↗