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 GitHubdesktop | mobile | server | ||||||||||||
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get |
Legend
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- Full support
- Full support
- See implementation notes.
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