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WeakSet.prototype.delete()

The delete() method of WeakSet instances removes the specified element from this WeakSet.

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Syntax

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

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

	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