elementUI表格-判断是否是多选状态

1.

@selection-change="handleSelectionChange"

2.在data中增加数组：

multipleSelection: [],

3.

 handleSelectionChange(val) {
      this.multipleSelection = val;
      if (this.multipleSelection.length > 1) {
        //如果选择了多条数据审核按钮变为'批量审核通过'
        this.examineBtn = "批量审核通过";
      }
   },