vue 实现分钟倒计时

实现

 

1. 首先，是两个div用来显示我们的剩余支付时间

2. 然后，是倒计时函数countdown

//倒计时
countdown () {
      const end = Date.parse(new Date('2020-05-05 03:59:23'))
      const now = Date.parse(new Date())
      const msec = end - now

      console.log(msec)
      if(msec<0) return;

      let day = parseInt(msec / 1000 / 60 / 60 / 24)
      let hr = parseInt(msec / 1000 / 60 / 60 % 24)
      let min = parseInt(msec / 1000 / 60 % 60)
      let sec = parseInt(msec / 1000 % 60)
      this.day = day
      this.hr = hr > 9 ? hr : '0' + hr
      this.min = min > 9 ? min : '0' + min
      this.sec = sec > 9 ? sec : '0' + sec
      const that = this
      if(min>=0 && sec>=0){
        //倒计时结束关闭订单
        if(min==0 && sec==0){

          return
        }
        setTimeout(function () {
          that.countdown()
        }, 1000)
      }
    }

 

3. 最后，在mounted里事先执行countdown方法

mounted () {
  this.countdown()
}