WeakMap.prototype.delete()
The delete()
method removes the specified element from a
WeakMap
object.
Try it
Syntax
js
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
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