單純使用setInterval會使頁面卡死，setTimeout自帶清除緩存，組合使用實現(xiàn)輪詢可解決瀏覽器崩潰

window.setInterval(() => {
  setTimeout(fun, 0)
}, 30000)

完整代碼

<template>
 <div></div>
</template>
 
<script>
export default {
 data() {
  return {
   num: 0,
 timer: null,
  };
 },
destroyed() {
//離開頁面是銷毀
    clearInterval(this.timer);
    this.timer = null;
  },
 created() {
  // 實現(xiàn)輪詢
 this.timer = window.setInterval(() => {
        setTimeout(this.getProjectList(), 0);
      }, 3000);
 },
 methods: {
stop() {
      clearInterval(this.timer);
      this.timer = null;
    },
  // 請求是否有新消息
 getProjectList() {
   console.log("請求" + this.num++ + "次");
if(this.num==8){
this.stop() 
}
  }
 }
};
</script>
 
<style scoped>
</style>