The delete()
method removes the specified element from a WeakMap
object.
The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.
Syntax
wm.delete(key);
Parameters
key
- The key of the element to remove from the
WeakMap
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
var wm = new WeakMap(); wm.set(window, 'foo'); wm.delete(window); // Returns true. Successfully removed. wm.has(window); // Returns false. The window object is no longer in the WeakMap.
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'WeakMap.prototype.delete' in that specification. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
delete | Chrome Full support 36 | Edge Full support 12 | Firefox
Full support
6
| IE Full support 11 | Opera Full support 23 | Safari Full support 8 | WebView Android Full support 37 | Chrome Android Full support 36 | Firefox Android
Full support
6
| Opera Android Full support 24 | Safari iOS Full support 8 | Samsung Internet Android Full support 3.0 | nodejs
Full support
0.12
|
Legend
- Full support
- Full support
- See implementation notes.
- See implementation notes.
- User must explicitly enable this feature.
- User must explicitly enable this feature.