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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

Browser compatibilityUpdate compatibility data on GitHub

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

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet/delete