WeakMap.prototype.delete()

The delete() method removes the specified element from a WeakMap object.

Syntax

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 Language Specification (ECMAScript)
# sec-weakmap.prototype.delete

Browser compatibility

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See also