After vue obtains the page details, how to monitor whether the user has modified the information when switching pages?

name: 'supplier',
    components:{cmtWrap,cmtContent},
    props: [],
    beforeRouteLeave (to, from, next) {//离开当前页
      if(this.updateCount > 1){ //更新次数大于1 说明用户修改过当前页数据 因为获取详情时会更新一次
        if(from.path.includes('nowPath')){
          this.$confirm('即将离开当前页，请确定是否保存当前数据？', '离开当前页', {
            confirmButtonText: '保存',
            cancelButtonText: '不保存',
            type: 'warning'
          }).then(() => {
            //...todo 这里调接口 保存数据
            next()
          }).catch(() => {next()});
        }else{next()}
      }else{
        next()
      }
    },
    updated:function () {
      this.updateCount = this.updateCount + 1
    },
    data() {
      return {
        updateCount:0,//判断用户是否更新当前数据
      }
    },
    computed:{},
    watch:{},
    mounted:function () {　　　　this.getInitData()　　},
    methods: {
　　　　getInitData:function(){
　　　　//...todo  页面进来，先获取默认数据

　　　　}

　　},
  }