WeakMap.prototype.get()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

El método get() devuelve un elemento específico del objeto WeakMap.

Pruébalo

const weakmap1 = new WeakMap();
const object1 = {};
const object2 = {};

weakmap1.set(object1, 42);

console.log(weakmap1.get(object1));
// Expected output: 42

console.log(weakmap1.get(object2));
// Expected output: undefined

Sintaxis

wm.get(key);

Parámetros

key

Requerido. Es la llave del elemento a retornar desde el objeto WeakMap.

Valores devueltos

El elemento asociado con la llave específica en el objeto WeakMap. Si la llave no está presente, devolverá undefined.

Ejemplos

Usando el método get

js
var wm = new WeakMap();
wm.set(window, "foo");

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

Especificaciones

Specification
ECMAScript® 2025 Language Specification
# sec-weakmap.prototype.get

Compatibilidad con navegadores

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
get

Legend

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Full support
Full support
See implementation notes.

Vea también