WeakSet
Widely available since 2018-03-30
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.
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Specifications
- ECMAScript® 2026 Language Specification (#sec-weakset-objects), from TC39 (Ecma International).
Browser support
- Chrome 36 Released on 2014-07-16
- Chrome Android 36 Released on 2014-07-16
- Edge 12 Released on 2015-07-29
- Firefox 34 Released on 2014-12-01
- Firefox for Android 34 Released on 2014-12-01
- Safari 9 Released on 2015-09-30
- Safari on iOS 9 Released on 2015-09-16
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