Set.prototype.keys()
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.
構文
js
keys()
引数
なし。
返値
新しい反復可能なイテレーターオブジェクトです。
例
keys() の使用
keys()
メソッドは values()
メソッドとまったく同じです。
js
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"
仕様書
Specification |
---|
ECMAScript® 2025 Language Specification # sec-set.prototype.keys |
ブラウザーの互換性
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
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keys |
Legend
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- Full support
- Full support
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