el-table自定义表头，表头控制数据的展示与隐藏

           
          
            
            
          
        

 tableDataNo: [
        {
          id: 30,
          ruleName: "sidjfaoiund",
          jobPosition: "dsagddsfgv",
          comName: "dsafsdfds",
          createTime: "sdafds",
          learningState: "sdzfdsf",

        },
      ],
      tableHeaderUpOn: "展开",

    tableDataNoClick() {
      if (this.tableHeaderUpOn == "展开") {
        this.tableHeaderUpOn = "收起"
      } else {
        this.tableHeaderUpOn = "展开"
      }
    },