The delete()
method of WeakSet
instances removes the specified element from this WeakSet
.
On this page
WeakSet.prototype.delete()
Try it
Syntax
js
weakSetInstance.delete(value)
Parameters
-
value
-
The value to remove from the
WeakSet
object.
Return value
true
if an element in the WeakSet
object has been removed successfully. false
if the value
is not found in the WeakSet
. Always returns false
if value
is not an object or a non-registered symbol.
Examples
Using the delete() method
js
const ws = new WeakSet();
const 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
Browser compatibility
Desktop | Mobile | Server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | Deno | Node.js | ||
delete |
36 | 12 | 34 | 23 | 9 | 36 | 34 | 24 | 9 | 3.0 | 37 | 1.0 | 0.12.0 |
See also
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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