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Symbol.matchAll - JavaScript | MDN
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このページはコミュニティーの尽力で英語から翻訳されました。MDN Web Docs コミュニティーについてもっと知り、仲間になるにはこちらから。
Symbol.matchAll
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2020年1月.
Symbol.matchAll は静的データプロパティで、ウェルノウンシンボルである Symbol.matchAll を表します。String.prototype.matchAll() メソッドは最初の引数に対して、文字列に対する現在のオブジェクトの照合を行うイテレーターを返すメソッドを、このシンボルで探します。
詳しくは、RegExp.prototype[Symbol.matchAll]() および String.prototype.matchAll() を参照してください。
試してみましょう
const re = /[0-9]+/g;
const str = "2016-01-02|2019-03-07";
const result = re[Symbol.matchAll](str);
console.log(Array.from(result, (x) => x[0]));
// Expected output: Array ["2016", "01", "02", "2019", "03", "07"]
値
ウェルノウンシンボル Symbol.matchAll です。
Symbol.matchAll のプロパティ属性 | |
|---|---|
| 書込可能 | 不可 |
| 列挙可能 | 不可 |
| 設定可能 | 不可 |
例
Symbol.matchAll の使用
js
const str = "2016-01-02|2019-03-07";
const numbers = {
*[Symbol.matchAll](str) {
for (const n of str.matchAll(/[0-9]+/g)) yield n[0];
},
};
console.log(Array.from(str.matchAll(numbers)));
// ["2016", "01", "02", "2019", "03", "07"]
仕様書
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-symbol.matchall |
ブラウザーの互換性
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