业务需求：数据大屏页面中的某个方法需要在今天12:00执行一次，或是在今天的17:00执行一次，

这里用到 setTimeout定时器来实现。

//获取某个时间的时间戳   
 getCurrentDate(time) {
      let now = new Date();
      let year = now.getFullYear();
      let month = now.getMonth() + 1;
      let day = now.getDate();
      return year + "-" + month + "-" + day + ' ' + time
  },

mounted(){
    let timeList = ['7:35:00', '17:05:00']
    timeList.forEach(item => {
      let nowtime = new Date().getTime()
      let onetime = new Date(this.getCurrentDate(item)).getTime()
      if (nowtime > onetime) {
        return
      } else {
        let t = (onetime - nowtime)
        setTimeout(() => {
          //要执行的方法
        }, t)
      }
    })
}