uni-app使用countdown插件实现倒计时

<script>
 import uniCountdown from '@/components/uni-countdown/uni-countdown.vue'
 export default {
 data() {
  return {
  d:'',
  h:'',
  m:'',
  n:''
  }
 },
 
 components:{
  uniCountdown
 }
 }
</script>

<view class="created" v-if="myData.stat == '未拍卖'">
 <span>距开始剩</span>
 <span class="timer">
    <uni-countdown :day="d" :hour="h" :minute="m" :second="s"></uni-countdown>
  </span>
</view>

var date = new Date();
  var now = date.getTime();
  var star = this.myData.startTime
  var endDate = new Date(star); 
  var end = endDate.getTime(); 
  var leftTime = end-now;
  if (leftTime >= 0) {
 this.d = Math.floor(leftTime/1000/60/60/24); 
 this.h = this.myData.validTime+Math.floor(leftTime/1000/60/60%24); 
 this.m = Math.floor(leftTime/1000/60%60); 
 this.s = Math.floor(leftTime/1000%60);
 console.log(this.d+'天'+this.h+'时'+this.m+'分'+this.s+'秒')
}

<template>
  <view class="created">
 <span>距开始剩</span>
 <span class="timer">
      <uni-countdown :day="d" :hour="h" :minute="m" :second="s"></uni-countdown>        
    </span>
 </view>
</template>
<script>
 import uniCountdown from '@/components/uni-countdown/uni-countdown.vue'
 export default {
 data() {
  return {
  d:'',
  h:'',
  m:'',
  n:'',
  }
 },
 onLoad(option){
  this.init()
 },
 
 methods: {
  init(){
        var date = new Date();
  var now = date.getTime();//获得当前时间与1970年1月1日时间相差的毫秒数
  var star = this.myData.startTime
  var endDate = new Date(star); 
  var end = endDate.getTime();//结束时间与1970年1月1日时间相差的毫秒数
  var leftTime = end-now;//计算两日期之间相差的毫秒数
  if (leftTime >= 0) {
   this.d = Math.floor(leftTime/1000/60/60/24);
   this.h = Math.floor(leftTime/1000/60/60%24); 
   this.m = Math.floor(leftTime/1000/60%60); 
   this.s = Math.floor(leftTime/1000%60);
   console.log(this.d+'天'+this.h+'时'+this.m+'分'+this.s+'秒')
  }
      }
    },
 components:{
  uniCountdown
 }
 }
</script>