Web/JavaScript/Reference/Global objects/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 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

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
ECMAScript (ECMA-262)The definition of 'WeakSet.prototype.delete' in that specification.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
`delete`	Chrome Full support 36	Edge Full support 12	Firefox Full support 34	IE No support No	Opera Full support 23	Safari Full support 9	WebView Android Full support 37	Chrome Android Full support 36	Firefox Android Full support 34	Opera Android Full support 24	Safari iOS Full support 9	Samsung Internet Android Full support 3.0	nodejs Full support 0.12

Legend

Full support: Full support
No support: No support