WeakSet

A WeakSet object stores unique values of any type without creating strong references to the values, such that membership in the set does not prevent garbage collection of the value.

Baseline Status: Achieved Widely Available on Mar 30, 2018 (Cross-browser Newly Available since Sep 30, 2015).

Desktop Browser Engine Support

Google Chrome

36

Supported

Mozilla Firefox

34

Supported

Apple Safari

9

Supported

Microsoft Edge

12

Supported

Mobile Browser Engine Support

Chrome Android

36

Firefox Android

34

Safari iOS

9

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

javascript.builtins.WeakSet ↗ javascript.builtins.WeakSet.WeakSet ↗ javascript.builtins.WeakSet.WeakSet.iterable_allowed ↗ javascript.builtins.WeakSet.WeakSet.null_allowed ↗ javascript.builtins.WeakSet.add ↗ javascript.builtins.WeakSet.delete ↗ javascript.builtins.WeakSet.has ↗ javascript.builtins.WeakSet.symbol_as_keys ↗