小程序昨天日期(年月日)函數

function getYesterdayDate() {

  const today = new Date();

  const yesterday = new Date(today.getTime() - (24 * 60 * 60 * 1000));

  return yesterday.toISOString().split('T')[0];

}

console.log(getYesterdayDate()); // 輸出格式為YYYY-MM-DD