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JavaScript: 引数が多いときはオブジェクトリテラルで渡すといい

Posted at

引数が多い関数、たとえば

const introduce = (name, age, from, job) => {
  console.log(`${name}さんは${age}歳、${from}出身の${job}です。`)
}

introduce('山田太郎', 20, '宮城県', 'イラストレーター');
//山田太郎さんは20歳、宮城県出身のイラストレーターです。

下のように書くといい。

const introduce = ({ name, age, from, job }) => {
  console.log(`${name}さんは${age}歳、${from}出身の${job}です。`)
}

introduce({
  name: '山田太郎',
  age: 20,
  from: '宮城県',
  job: 'イラストレーター',
});
//山田太郎さんは20歳、宮城県出身のイラストレーターです。

引数の順番を変えても問題く関数を実行できる。

introduce({
  age: 20,
  from: '宮城県',
  job: 'イラストレーター',
  name: '山田太郎',
});
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