WeakSet.prototype.delete()

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

Try it

Syntax

delete(value)

Parameters

value

Required. The object 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 or if the value is not an object.

Examples

Using the delete() method

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

Specification
ECMAScript Language Specification
# sec-weakset.prototype.delete

Browser compatibility

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See also