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.
La méthode get()
permet de renvoyer un élément donné d'un objet WeakMap
.
Exemple interactif
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
Syntaxe
js
wm.get(clé);
Paramètre
clé
-
Ce paramètre est obligatoire. Il correspond à la clé de l'élément qu'on souhaite récupérer depuis l'objet
WeakMap
.
Valeur de retour
L'élément associé à la clé donnée ou undefined
si la clé ne peut pas être trouvée dans l'objet WeakMap
.
Exemples
js
var wm = new WeakMap();
wm.set(window, "toto");
wm.get(window); // Renvoie "toto"
wm.get("machin"); // Renvoie undefined.
Spécifications
Specification |
---|
ECMAScript® 2025 Language Specification # sec-weakmap.prototype.get |
Compatibilité des navigateurs
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get |
Legend
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- Full support
- Full support
- See implementation notes.
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