Set.prototype[@@iterator]()

@@iterator 属性的初始值和 values 属性的初始值是同一个函数。

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mySet[Symbol.iterator]

返回 Set iterator 函数，默认值是 values() 函数。

const mySet = new Set();
mySet.add('0');
mySet.add(1);
mySet.add({});

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

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

const mySet = new Set();
mySet.add('0');
mySet.add(1);
mySet.add({});

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

• Set.prototype.entries()
• Set.prototype.keys()
• Set.prototype.values()