vue 监听路由里query的变化 如uejin.cn/editor/drafts/7038234360750964744？xxx=xxx

watch: {\
    // 监听路由发生改变\
    '$route': {\
            handler(newVal) {\
        console.log(newVal)\
       // query就是网址后面的问号内容
        this.guid = newVal.query.key\
                    this.bindData()\
      } }\
  },