参考文档：
vben admin——Table
ant design vue——table

切入点 rowSelection 选择列配置
找源码：
1、BasicTable.vue
重点代码：

v-bind="getBindValues"

rowSelection: unref(getRowSelectionRef);

const {
  getRowSelection,
  getRowSelectionRef,
  getSelectRows,
  clearSelectedRowKeys,
  getSelectRowKeys,
  deleteSelectRowByKey,
  setSelectedRowKeys,
} = useRowSelection(getProps, tableData, emit);

useRowSelection;

2、useRowSelection.ts
重点代码：

getRowSelectionRef();

重点：onChange()、getCheckboxProps()、onSelect() 这三个函数

const getRowSelectionRef = computed((): TableRowSelection | null => {
  const { rowSelection } = unref(propsRef);
  if (!rowSelection) {
    return null;
  }

  return {
    selectedRowKeys: unref(selectedRowKeysRef),
    hideDefaultSelections: false,
    // 	选中项发生变化时的回调
    onChange: (selectedRowKeys: string[]) => {
      setSelectedRowKeys(selectedRowKeys);
      // selectedRowKeysRef.value = selectedRowKeys;
      // selectedRowRef.value = selectedRows;
    },
    //选择框的默认属性配置：如可设置是否可选
    getCheckboxProps: (record) => {
      return {
        disabled: false, // Column configuration not to be checked
      };
    },
    // 用户手动选择/取消选择某列的回调
    onSelect: (...args) => {
      return { ...args };
    },
    ...omit(rowSelection, ["onChange"]),
  };
});