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Map.prototype.values() - JavaScript | MDN
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Map.prototype.values()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015年7月.
values()
は Map
インスタンスのメソッドで、この Map
オブジェクトに挿入された要素の値を挿入順に列挙する新しいマップイテレーターオブジェクトを返します。
試してみましょう
const map = new Map();
map.set("0", "foo");
map.set(1, "bar");
const iterator = map.values();
console.log(iterator.next().value);
// 予想される結果: "foo"
console.log(iterator.next().value);
// 予想される結果: "bar"
構文
js
values()
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
>values() の使用
js
const myMap = new Map();
myMap.set("0", "foo");
myMap.set(1, "bar");
myMap.set({}, "baz");
const mapIter = myMap.values();
console.log(mapIter.next().value); // "foo"
console.log(mapIter.next().value); // "bar"
console.log(mapIter.next().value); // "baz"
仕様書
Specification |
---|
ECMAScript® 2026 Language Specification> # sec-map.prototype.values> |
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