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JavaScript の分割代入で変数名を変更する

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JavaScript の分割代入についての学習メモ。

詳細

これができるのは知っていた。

const obj = { a: 42, b: true };
const { a, b } = obj;

console.log(a); // 42
console.log(b); // true

これができるのは知らなかった。

const obj = { a: 42, b: true };
const { a: foo, b: bar } = obj;

console.log(foo); // 42
console.log(bar); // true

もちろん TypeScript でも動作する
https://typescriptbook.jp/reference/values-types-variables/object/destructuring-assignment-from-objects#%E4%BB%A3%E5%85%A5%E3%81%99%E3%82%8B%E5%A4%89%E6%95%B0%E5%90%8D%E3%81%AE%E6%8C%87%E5%AE%9A

まとめ

JavaScript,TypeScript では分割代入の際に変数名を変更できる。

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