基于Vue3和Element Plus实现可扩展的表格组件

<template>
  <el-table
    border
    stripe
    :data="data"
    :height="tableHeight"
    table-layout="fixed"
    :row-key="rowKey"
    :highlight-current-row="highlightCurrentRow"
    :tree-props="treeProps"
    :header-cell-style="{
      background: '#f5f7fa',
      color: '#606266',
      fontSize: '13px',
    }"
    @selection-change="handleSelectionChange"
    :v-loading="loading"
    :row-class-name="tableRowClassName"
    :expand-row-keys="expandRowKeys"
    class="absolute"
  >
    <el-table-column
      v-if="showSelection"
      align="center"
      fixed
      type="selection"
      width="55"
    />
    <el-table-column
      v-for="tableModel in tableModels"
      :key="tableModel.key"
      :prop="tableModel.key"
      :label="tableModel.label"
      :width="tableModel.width"
      :min-width="tableModel.minWidth"
      :align="tableModel.align"
      :header-align="tableModel.headerAlign"
    >
      <template #default="{ row }">
        <slot
          v-if="slots[tableModel.key]"
          :name="tableModel.key"
          v-bind="row"
        ></slot>
        <span v-else>
          {{ row[tableModel.key] }}
        </span>
      </template>
    </el-table-column>
    <el-table-column
      fixed="right"
      label="操作"
      :width="operationsWidth"
      :min-width="minWidth"
      :align="operationsAlign"
      :header-align="operationsHeaderAlign"
      v-if="shoeOperations"
    >
      <template #default="{ row, $index }">
        <slot name="operationsStart" v-bind="row"></slot>
        <el-button
          link
          type="primary"
          :icon="Edit"
          @click="handleEdit(row, $index)"
          :v-hasPerm="editHasPerm"
          v-if="showEditBtn"
          >编辑
        </el-button>
        <el-button
          @click="handleDelete(row, $index)"
          link
          type="danger"
          :icon="Delete"
          v-if="showDeleteBtn"
          :v-hasPerm="deleteHasPerm"
          >删除
        </el-button>
        <slot name="operationsEnd" v-bind="row"></slot>
      </template>
    </el-table-column>
  </el-table>
</template>

<script setup lang="ts">
// 使用 unknown 类型表示任何值
type MyUnknownType = unknown;
/*
 * @slot default 插槽
 * operationsStart 从操作栏开头增加按钮
 * operationsStart 从操作栏结尾增加按钮
 * Key TableModel里面的Key，用来自定义列的内容
 * */

import { Delete, Edit } from '@element-plus/icons-vue';

// 【接口】table表格模型
interface ITableModel {
  // 表头显示文字
  label: string;
  // 表格列Keu
  key: string;
  // 表格列宽
  width?: number | string;
  // 表格列显示文字
  value?: string;
  // 表格内容位置
  align?: string;
  // 表格表头位置
  headerAlign?: string;
  // 列最小宽度
  minWidth?: number | string;
}

// 【接口】接受传参字段
interface IProps {
  // 生成表格参数
  tableModels?: ITableModel[];
  // 表格数据
  data: object[];
  // 是否为树形表格
  treeProps?: unknown;
  // 加载状态
  loading?: boolean;
  // 表格行Keu
  rowKey?: any;
  // 表格高度
  height?: any;
  // 表格自适应减去的高度
  // eslint-disable-next-line vue/prop-name-casing
  dynamic?: number;
  // 表格单选
  highlightCurrentRow?: boolean;
  // 是否显示编辑按钮
  showEditBtn?: boolean;
  // 是否显示多选框
  showSelection?: boolean;
  // 是否显示删除按钮
  showDeleteBtn?: boolean;
  // 删除权限
  deleteHasPerm?: any;
  // 编辑权限
  editHasPerm?: any;
  // 操作栏宽度
  operationsWidth?: number;
  // 是否显示操作栏
  shoeOperations?: boolean;
  // 操作栏内容位置
  operationsAlign?: string;
  // 操作栏头部位置
  operationsHeaderAlign?: string;
  // 操作栏最小宽度
  minWidth?: number | string;
  // 树表格时默认展开参数
  expandRowKeys?: any;
}

// 【接口】分页
interface IPage {
  // 当前页
  pageNum: number;
  // 每页显示条数
  pageSize: number;
}

// 初始化默认参数
const props = withDefaults(defineProps<IProps>(), {
  loading: false,
  rowKey: 'id',
  dynamic: 0,
  showEditBtn: true,
  highlightCurrentRow: false,
  showSelection: false,
  showDeleteBtn: true,
  deleteHasPerm: [],
  editHasPerm: [],
  tableModels: () => [],
  treeProps: () => [],
  shoeOperations: true,
  operationsWidth: 150,
  operationsAlign: 'center',
  operationsHeaderAlign: 'center',
  expandRowKeys: [],
  minWidth: 'auto',
  height: 'auto'
});

// 插槽对象
const slots = useSlots();

// 定义组件发出的事件
const emit = defineEmits(['handleEdit', 'handleDelete', 'handlePagination', 'handleSelectionChange', 'handlePage']);

const tableHeight = ref<any>();

// watch监听动态计算table的高度，根据dynamic是否大于0,dynamic层级大于height
watch(
  [() => props.height, () => props.dynamic],
  ([height, dynamic]) => {
    if (height && !dynamic) {
      tableHeight.value = height;
    } else if ((!height && dynamic) || (height && dynamic)) {
      // 获取浏览器窗口高度
      const windowHeight = window.innerHeight;
      tableHeight.value = windowHeight - dynamic;
    } else {
      tableHeight.value = 'auto';
    }
  },
  {
    deep: true,
    immediate: true
  }
);

// 增加样式Class
const tableRowClassName = ({ row, rowIndex }: { row: Object; rowIndex: number }) => {
  if (rowIndex % 2 === 1) {
    return 'warning-row';
  }
  return '';
};

// 点了多选
const handleSelectionChange = (val: ITableModel[]) => {
  emit('handleSelectionChange', val);
};

// 点击了编辑
const handleEdit = (data: object, index: number) => {
  emit('handleEdit', data, index);
};

// 点击了删除
const handleDelete = (data: object, index: number) => {
  emit('handleDelete', data, index);
};
</script>

<Table
  :dynamic="dynamicHeight"
  :tableModels="table.tableModels"
  :data="table.data"
  :loading="table.loading"
  :showSelection="table.showSelection"
  :operationsWidth="table.operationsWidth"
  @handle-edit="openDialog"
  @handle-delete="handleDelete"
  @handle-selection-change="handleSelectionChange"
>
  <!-- 自定义列【status】字段 -->
  <template #status="scope">
    <el-tag size="small" v-if="scope.status === 1" type="success">
      正常
    </el-tag>
    <el-tag size="small" v-else type="info">禁用</el-tag>
  </template>
  <!-- 操作栏从开头增加按钮 -->
  <template #operationsStart="scope">
    <el-button
      type="primary"
      size="small"
      link
      :icon="Position"
      @click="openMenuDialog(scope)"
    >
      分配权限
    </el-button>
  </template>
</Table>

const table = reactive({
  tableModels: [
    {
      label: "角色名称",
      key: "name",
      align: "left",
      headerAlign: "center",
      value: "name",
      minWidth: 200,
    },
    {
      label: "角色编码",
      key: "code",
      width: 200,
      align: "center",
      headerAlign: "center",
      value: "code",
    },
    {
      label: "数据权限",
      key: "dataScope",
      width: 200,
      align: "center",
      headerAlign: "center",
      value: "dataScope",
    },
    {
      label: "状态",
      key: "status",
      width: 200,
      align: "center",
      headerAlign: "center",
      value: "status",
    },
    {
      label: "排序",
      key: "sort",
      width: 200,
      align: "center",
      headerAlign: "center",
      value: "sort",
    },
  ],
  data: [] as any[],
  showSelection: true,
  operationsWidth: 250,
  loading: false,
});