data() {
  return {
    timer: null
  }
},
mounted() {
   // 每隔5分钟定时刷新
   this.timer = setInterval(() => {
     this.getFxItemlist();
   }, 300000)
 },
 beforeDestroy() {
   clearInterval(this.timer);
 },
 methods: {
 getFxItemlist() {
   ...
 }
}