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JavaScript で immutable にオブジェクトからプロパティを削除する方法

Last updated at Posted at 2019-06-11

分割代入 (Destructuring assignment) 構文 を使って以下のように簡潔に書ける


const foo = {
  a: 1,
  b: 2,
  c: 3,
  x: 9 // 取り除きたいプロパティ
};

const { x, ...bar } = foo;

console.log(bar); // { a: 1, b: 2, c: 3 }
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