Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

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




Using the clear method

const wm = new WeakMap();
const obj = {};

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

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


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


Not part of any standard.

Browser compatibility

BCD tables only load in the browser

See also