WeakMap.prototype.delete()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The delete()
method of WeakMap
instances removes the specified element from this WeakMap
.
Try it
Syntax
js
weakMapInstance.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
. Always returns false
if key
is not an object or a non-registered symbol.
Examples
Using the delete() method
js
const 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 Language Specification # sec-weakmap.prototype.delete |
Browser compatibility
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
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delete |
Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
- See implementation notes.
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.