要素の抽出・削除・書き換えなどの配列操作(JavaScript) - Qiita

const fruits = ["banana", "apple", "apple", "orange", "grape", "apple"]; // fromを使う方法 const uniqueFruits = Array.from(new Set(fruits)); console.log(uniqueFruits) // ...を使う方法 const uniqueFruits2 = [...new Set(fruits)]; console.log(uniqueFruits2) // 共に ["banana", "apple", "orange", "grape"] // 従来の方法(おすすめしない) const result = fruits.filter((x, i, self) => { return self.indexOf(x) === i; }); console.log