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JavaScript Dateオブジェクトの罠について

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Dateオブジェクトの罠について

年月日指定でオブジェクトを生成する時、区切り文字によって時刻が異なる

ハイフン区切りの場合

var date = new Date('2020-07-01');
console.log(date);
// => Wed Jul 01 2020 09:00:00 GMT+0900 (日本標準時)

スラッシュ区切りの場合

var date = new Date('2020/07/01');
console.log(date);
// => Wed Jul 01 2020 00:00:00 GMT+0900 (日本標準時)
  • ハイフン区切りの場合では、指定年月日の09:00:00を返すが、スラッシュ区切りの場合では、指定年月日の00:00:00を返す
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