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

Browser compatibility

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
deleteChrome Full support 36Edge Full support 12Firefox Full support 34IE No support NoOpera Full support 23Safari Full support 9WebView Android Full support 37Chrome Android Full support 36Firefox Android Full support 34Opera Android Full support 24Safari iOS Full support 9Samsung Internet Android Full support 3.0nodejs Full support 0.12

Legend

Full support  
Full support
No support  
No support

See also

Related Topics
  1. Standard built-in objects
  2. WeakSet
  3. Methods
    1. WeakSet.prototype.add()
    2. WeakSet.prototype.clear()
    3. WeakSet.prototype.delete()
    4. WeakSet.prototype.has()
  4. Inheritance:
  5. Function
  6. Properties
    1. Function.arguments
    2. Function.arity
    3. Function.caller
    4. Function.displayName
    5. Function.length
    6. Function.name
  7. Methods
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.isGenerator()
    5. Function.prototype.toSource()
    6. Function.prototype.toString()
  8. Object
  9. Properties
    1. Object.prototype.__count__
    2. Object.prototype.__noSuchMethod__
    3. Object.prototype.__parent__
    4. Object.prototype.__proto__
    5. Object.prototype.constructor
  10. Methods
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toSource()
    10. Object.prototype.toString()
    11. Object.prototype.unwatch()
    12. Object.prototype.valueOf()
    13. Object.prototype.watch()
    14. Object.setPrototypeOf()