js中计算两个日期的差值

function dateDifference(date1, date2) {
  // 创建Date对象
  const oneDay = 24 * 60 * 60 * 1000; // 一天的毫秒数
  const diffDays = Math.round(Math.abs((date2 - date1) / oneDay));
  return diffDays;
}

// 使用示例
const date1 = new Date('2023-10-01');
const date2 = new Date('2023-10-10');
console.log(dateDifference(date1, date2)); // 输出相差的天数

function dateDifferenceUTC(date1, date2) {
  const oneDay = 24 * 60 * 60 * 1000; // 一天的毫秒数
  const diffDays = Math.round(Math.abs((date2.getTime() - date1.getTime()) / oneDay));
  return diffDays;
}

// 使用UTC时间
const date1UTC = new Date('2023-10-01T00:00:00Z');
const date2UTC = new Date('2023-10-10T00:00:00Z');
console.log(dateDifferenceUTC(date1UTC, date2UTC)); // 输出相差的天数