vue + moment 实现倒计时

示例

代码

<span>{{countDown(endDate)}}span>

/*引入日期插件*/
import moment from 'moment'
export default {
	data() {
	  return {
	    now: moment(),
	    endDate: '2019-05-07 08:20:00',
	  }
	},
	mounted() {
	  //定时更新当前时间
	 setInterval(()=>{
	   this.now = moment()
	 },1000),
	  //数字前补 0 
	  // num传入的数字，n需要的字符长度
	 PrefixInteger(num, n) {
	   return (Array(n).join(0) + num).slice(-n);
	 }
	},
	computed: {
	  //计算属性，返回剩余时间
	  countDown(){
	    return function(endDate) {
	      let m1 = this.now
	      let m2 = moment(endDate)
	      var du = moment.duration(m2 - m1, 'ms'),
	      hours = du.get('hours'),
	      mins = du.get('minutes'),
	      ss = du.get('seconds');
	      if(hours<=0 && mins<=0 && ss<=0) {
	        return "已超时"
	      }else {
	        return this.PrefixInteger(hours,2) + ':' + this.PrefixInteger(mins,2) + ':' + this.PrefixInteger(ss,2)
	      }
	    }
	  }
	},
}