WeakMap.prototype.get()

The get() method returns a specified element from a WeakMap object.

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Syntax

get(key)

Parameters

key: Required. The key of the element to return from the WeakMap object.

Return value

The element associated with the specified key in the WeakMap object. If the key can't be found, undefined is returned.

Examples

Using the get() method

const wm = new WeakMap();
wm.set(window, 'foo');

wm.get(window); // Returns "foo".
wm.get('baz');  // Returns undefined.

Specifications

Specification
ECMAScript Language Specification # sec-weakmap.prototype.get

Browser compatibility

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See also