vue+定时器

interval(){
      this.timer=setInterval(()=>{
            console.log('执行定时器')
            console.log(this.num);
            this.num++;
             if(某个条件下){
                clearInterval(this.timer)
             }
        },3000)
    },
  },
  created(){
      this.interval()
  }
  beforeDestroy () {
    console.log('清除定时器')
   clearInterval(this.timer)

}