test() {
        console.log('running......')
        console.log($('.el-table__header-wrapper tr>th:first'))
        $('.el-table__header-wrapper tr>th:first').css({'position':'sticky', 'left':0, 'z-index': 999})
        console.log($('.el-table__header-wrapper tr>th:first>div:first'))
        $('.el-table__header-wrapper tr>th:first>div:first').css('visibility', 'visible')
        console.log($('.el-table__header-wrapper tr:eq(1)>th:first'))
        $('.el-table__header-wrapper tr:eq(1)>th:first').css({'position':'sticky', 'left':0, 'z-index': 999})
        this.$forceUpdate()
        console.log('ending.......')
      }

this.$nextTick(()=>{
  // 下面三個會導致左側固定的列異常
  $('.el-card__body').css('overflow','visible')
  $('.el-card').css('overflow','visible')
  $('.el-tabs__content').css('overflow','visible')
  // el-table__fixed
  // $('.el-table__fixed').css('z-index','800')
  // 將第一行、第一列單元格中的文字顯示出來

})