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JavaScript 正規表現にマッチした文字列のインデックスを「全て」取得する方法

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結論

String.prototype.matchAll()を利用します。

const regex = /o/g;
const str = 'hello world';
const result = [];
const matches = str.matchAll(regex);
for (const match of matches) {
    result.push(match.index);
}
console.log(result);// [ 4, 7 ]

GitHubのリポジトリ

「searchAll」という関数で利用できるようにしました。よければ。

Github:js-searchAll

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