Web platform features explorer

WeakSet

Widely available since 2018-03-30
Tags: javascript Groups: JavaScript > Collections

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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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