WeakSet.prototype.delete()
The delete()
method removes the specified element from a WeakSet
object.
Syntax
JavaScript
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ws.delete(value);
Parameters
- value
- Required. The object remove from the
WeakSet
object.
Return value
true
if an element in the WeakMap
object has been removed successfully. false
if the key is not found in the WeakMap
or if the key is not an object.
Examples
Using the delete
method
JavaScript
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var ws = new WeakSet(); var obj = {}; ws.add(window); ws.delete(obj); // Returns false. No obj found to be deleted. ws.delete(window); // Returns true. Successfully removed. ws.has(window); // Returns false. The window is no longer present in the WeakSet.
Specifications
Specification | Status | Comment |
---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'WeakSet.prototype.delete' in that specification. |
Standard | Initial definition. |
ECMAScript 2017 Draft (ECMA-262) The definition of 'WeakSet.prototype.delete' in that specification. |
Draft |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | 36 | 34 (34) | No support | 23 | No support |
Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|
Basic support | No support | 34.0 (34) | No support | No support | No support |
See also
License
© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/javascript/reference/global_objects/weakset/delete