JS制作网页倒计时案例

let hours = document.querySelector('#hour') let minuteEle = document.querySelector('#minutes') let scond = document.querySelector('#scond') let date = new Date(2022-3-28 0:0:0`) let tips = document.querySelector('.tips')

  setInterval(function(){
    let now = Date.now()
    let offset = parseInt((date - now) / 1000)
    let hour = parseInt(offset / 60 /60)
    hour = hour < 10? '0'+ hour :hour
    let minute = parseInt(offset % 3600 /60)
    minute = minute < 10? '0'+ minute :minute
    let second = offset % 60 
    second = second < 10? '0'+ second :second

    hours.innerHTML = hour
    minuteEle.innerHTML = minute
    scond.innerHTML = second
  },900)`