element-ui table使用type='selection'复选框全禁用(全选禁用)详解

<!-- 复选框禁用 -->
<el-table 
v-loading="loading" 
:data="studentList" 
@selection-change="handleSelectionChange"
>
    <el-table-column 
    type="selection" 
    width="55" 
    align="center"
    :selectable="selectable"
    />
 
    <el-table-column label="编号" align="center" prop="studentId" />

    //复选框禁用
    selectable(row,rowIndex) {
      //索引是从0开始，条件1是指只有第2行数据不被禁用  
      if(rowIndex == 1){
        return true;  //不禁用
      }else {
        return false;  //禁用
      }
    }

    //复选框禁用
    selectable(row,rowIndex) {
      //只有姓名【zhang】不被禁用
      if (row.studentName == "zhang") {
        return true;  //不禁用
      }else {
        return false;  //禁用
      }
    }

    //复选框全部禁用
    selectable(row,rowIndex) {
      return false;
    }

<!-- 复选框禁用 -->
<el-table 
v-loading="loading" 
:data="studentList" 
:header-cell-class-name="cellClass"
@selection-change="handleSelectionChange"
>
    <el-table-column 
    type="selection" 
    width="55" 
    align="center"
    :selectable="selectable"
    />
 
    <el-table-column label="编号" align="center" prop="studentId" />

export default {
  name: "Student",
  data() {
    return {
      // 全选按钮隐藏
      DisableSelection:true,
    }
  }
}

<style>
  .el-table .DisableSelection .cell .el-checkbox__inner{
          display: none;
          position: relative;
        }
  .el-table .DisableSelection .cell:before{
          content: "";
          position: absolute;
  }
</style>

    //全选按钮隐藏
    cellClass(row){
      row.length
        console.log(row)
          if(this.DisableSelection){
            if (row.columnIndex === 0) {
              return 'DisableSelection'
            }
          }   
    },

    //复选框禁用
    selectable(row,rowIndex) {
      //所有行都被禁用
      if(rowIndex < 0){
        this.DisableSelection = false && this.DisableSelection;
        return true;  //不禁用
      }else {
        return false;  //禁用
      }
    },

    //复选框禁用
    selectable(row,rowIndex) {
      //前两行可选的状态
      if(rowIndex < 2){
        this.DisableSelection = false && this.DisableSelection;
        return true;  //不禁用
      }else {
        return false;  //禁用
      }
    },