WeakMap.prototype.set()

The set() method adds a new element with a specified key and value to a WeakMap object.

Try it

Syntax

set(key, value)

Parameters

key: Required. Must be object. The key of the element to add to the WeakMap object.
value: Required. Any value. The value of the element to add to the WeakMap object.

Return value

The WeakMap object.

Examples

Using the set() method

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

// Add new elements to the WeakMap
wm.set(obj, 'foo').set(window, 'bar'); // chainable

// Update an element in the WeakMap
wm.set(obj, 'baz');

Specifications

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

Browser compatibility

BCD tables only load in the browser

See also