SOURCE

const countDown = () => {
  let start = moment(new Date());//获取开始时间
  let end = moment(new Date("2021-7-8 15:41:00"));//结束时间
  let diff = end.diff(start);//时间差
  let isArrived =  diff < 0;
  let durationTime = moment.duration(diff)
  return `${durationTime.days()} 天 ${durationTime.hours()} 时 ${durationTime.minutes()} 分 ${durationTime.seconds()} 秒`;
}
console.log(11, countDown())