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Showing content from https://developer.mozilla.org/fr/docs/Web/JavaScript/Reference/Global_Objects/Set/Symbol.iterator below:

Set.prototype[@@iterator]() - JavaScript | MDN

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La valeur initiale de la propriété @@iterator est le même objet fonction que la valeur initiale de la propriété Set.prototype.values.

const set1 = new Set();

set1.add(42);
set1.add("forty two");

const iterator1 = set1[Symbol.iterator]();

console.log(iterator1.next().value);
// Expected output: 42

console.log(iterator1.next().value);
// Expected output: "forty two"

La fonction associée au symbole @@iterator de l'objet. Par défaut, c'est la fonction values().

const monSet = new Set();
monSet.add("0");
monSet.add(1);
monSet.add({});

const setIter = monSet[Symbol.iterator]();

console.log(setIter.next().value); // "0"
console.log(setIter.next().value); // 1
console.log(setIter.next().value); // {}

const monSet = new Set();
monSet.add("0");
monSet.add(1);
monSet.add({});

for (const v of monSet) {
  console.log(v);
}

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