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Showing content from https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Set/keys below:

Set.prototype.keys() - JavaScript | MDN

Baseline Widely available

Set 实例的 keys() 方法是 values() 方法的别名。

无。

一个新的可迭代迭代器对象。

keys() 方法完全等价于 values() 方法。

const mySet = new Set();
mySet.add("foo");
mySet.add("bar");
mySet.add("baz");

const setIter = mySet.keys();

console.log(setIter.next().value); // "foo"
console.log(setIter.next().value); // "bar"
console.log(setIter.next().value); // "baz"

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