weakSet.delete

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

Syntax

ws.delete(value);

Parameters

value

Required. The object remove from the WeakSet 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 ws = new WeakSet();
var 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

Specification	Status	Comment
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'WeakSet.prototype.delete' in that specification.	Standard	Initial definition.
ECMAScript 2017 Draft (ECMA-262) The definition of 'WeakSet.prototype.delete' in that specification.	Draft

Browser compatibility

See also

• WeakSet
• WeakSet.prototype.clear()