浏览器标签页切换获取数据

refresh() {
      /* 浏览器标签页切换会触发"visibilitychange"事件*/
      document.addEventListener('visibilitychange', e => {
        // 切换显示标签
        if (document.visibilityState === 'visible') {
          this.getTabelData()
        }
      })
    },