vue轮询方法及清除

<script>
  var Vue = new Vue({
    el: '#app',
    data: {
      timer: null,
    },
    created() {
		this.pollfun()
    },
    methods: {
      //轮询
      pollfun() {
        this.timer = window.setInterval(() => {
          setTimeout(() => {
            this.getDetes()
          }, 0)
        }, 3000)
      },
      //清除轮询
      clearfun() {
        clearInterval(this.timer);
        this.timer = null;
      }
    },
    //离开页面清除
    destroyed() {
      window.clearInterval(this.timer)
    }
  })
</script>

destroyed 是监听页面销毁钩子函数