WeakMap.prototype.clear()

Obsolete
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

The clear() method used to remove all elements from a WeakMap object, but is no longer part of ECMAScript and its implementations.

Syntax

JavaScript
wm.clear();

Examples

Using the clear method

js;highlight:[10]
var wm = new WeakMap();
var obj = {};

wm.set(obj, "foo");
wm.set(window, "bar");

wm.has(obj); // true
wm.has(window); // true

wm.clear();

wm.has(obj)  // false
wm.has(window)  // false

Specifications

Not part of any current specification or draft. This method was part of the ECMAScript 6 draft specification until revision 28 (version of October 14, 2014), but has been removed in later versions of the draft. It will not be part of the final standard.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 36 No support [1] 11 23 7.1
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support No support No support [1] No support No support 8

[1] The clear() method has been supported from version 20 until version 45 (including).

See also

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/javascript/reference/global_objects/weakmap/clear

JavaScript Method Obsolete Prototype WeakMap