方法一：使用生命周期函数beforeDestory

  data() {
    return {
      timer: null
    }
  },
  methods: {
    getList().then(res => {
      this.timer = setInterval(() => {
        console.log('1s打印')
      },1000)
    })
  },
  beforeDestory() {
    clearInterval(this.timer)
    this.timer = null
  }

方法二：使用hook:beforeDestory

created() {
  let timer = setInterval(() => {
    console.log('1s打印')
  },1000);
  this.$once('hook:beforeDestory', () => {
    clearInterval(this.timer)
    timer = null
  })
}

使用hook的优势在于无需在vue实例上定义定时器，减少不必要的内存浪费而且设置和清除定时器的代码放在一块，可读性维护性更好