<template>  <div >   {{log}}  </div></template><script>  export default {    name: "TrainingInRotation",   data(){    return {     log:0,     timerId:1, // 模擬計時器id，唯一性     timerObj :{}, // 計時器存儲器    }   },   created(){     this.startTraining();   },   methods: {    /*   * 開始輪訓   * */    startTraining() {     let this_ = this;     const id = this.timerId++     this.timerObj[id] = true     async function timerFn() {      if (!this_.timerObj[id]) return      await this_.getData();      setTimeout(timerFn, 1 * 1000)     }     timerFn();    },    /*    * 停止輪訓    * */    stopTime() {     this.timerObj = {}    },    /*    * 要輪訓的代碼    * */    getData(){     this.log+=1;     console.log("this.log:"+this.log);    }   },   destroyed(){    this.stopTime();   }  }</script><style scoped></style>