Map.prototype[@@iterator]()

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 valeur initiale de la propriété @@iterator est la même fonction que la valeur initiale de la propriété entries.

Exemple interactif

const map1 = new Map();

map1.set("0", "foo");
map1.set(1, "bar");

const iterator1 = map1[Symbol.iterator]();

for (const item of iterator1) {
  console.log(item);
}
// Expected output: Array ["0", "foo"]
// Expected output: Array [1, "bar"]

Syntaxe

js
maMap[Symbol.iterator];

Valeur de retour

La fonction d'itération (le symbole @@iterator) de l'objet, par défaut, c'est la fonction entries().

Exemples

Utiliser [@@iterator]()

js
var maMap = new Map();
maMap.set("0", "toto");
maMap.set(1, "truc");
maMap.set({}, "bidule");

var mapIter = myMap[Symbol.iterator]();

console.log(mapIter.next().value); // ["0", "toto"]
console.log(mapIter.next().value); // [1, "truc"]
console.log(mapIter.next().value); // [Object, "bidule"]

Utiliser [@@iterator]() avec for..of

js
var maMap = new Map();
maMap.set("0", "toto");
maMap.set(1, "truc");
maMap.set({}, "bidule");

for (var v of maMap) {
  console.log(v);
}

Spécifications

Specification
ECMAScript® 2025 Language Specification
# sec-map.prototype-%symbol.iterator%

Compatibilité des navigateurs

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
[Symbol.iterator]

Legend

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Full support
Full support
Uses a non-standard name.
Has more compatibility info.

Voir aussi