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1.统一样式,通过slot插槽而非json配置项的形式,来兼容原有table的template写法,方便改造
2.列的显示隐藏控制,默认根据接口数据是否有返回绑定prop对应的字段,来实现列的权限控制显隐,也可通过外部传tableHeader来自行控制
3.合并分页器
<!-- * @Description: 公共table组件,可含分页器 * @使用方法:将<el-table>标签名替换为<my-table>即可, v-loading 指令需改为 :loading 绑定,其他所有属性方法的绑定和使用都和element-plus的table一致 * @个别事项: 1. 使用分页器需绑定 showPagination, 并传一个json配置参数 paginationConfig, 除了 @size-change 和 @current-change 两个方法直接绑定在table上外,分页器的其他原有属性统一加到 paginationConfig 2. tableHeader:默认只会渲染显示列表接口有返回的字段对应的prop列, 传了 tableHeader 则只会渲染 tableHeader 里有定义的字段列 * @例: <my-table :loading="loading" :data="data" @selection-change="selectTableChange" @cell-click="selectRowFun" :multipleSelection="multipleSelection" showPagination :paginationConfig="paginationConfig" @size-change="handleSizeChange" @current-change="handleCurrentChange" > <el-table-column type="selection" width="55" /> <el-table-column prop="name" label="姓名" width="150"></el-table-column> <el-table-column prop="ages" label="年龄" width="150"></el-table-column> <my-table/> --> <template> <el-table v-bind="$attrs" ref="table" v-loading="loading" :data="data" :max-height="maxHeight" :paginationConfig="null" > <children :key="key" /> </el-table> <div class="operation-bar"> <div class="left-operation"> <div class="checkedCount" v-if="showCheckedCount">已选 {{ multipleSelection.length }} 项</div> <div class="operation-box"> <slot name="operation"></slot> </div> </div> <div class="right-pagination"> <pagination v-if="showPagination" :pageConfig="_paginationConfig" @size-change="pageSizeChange" @current-change="currentPageChange" /> </div> </div> </template> <script lang="ts" setup> import { cloneVNode, Component, computed, reactive, ref, VNode, readonly, useSlots, defineExpose, watch, defineProps, defineEmits, useAttrs, nextTick, onMounted, onBeforeUnmount, } from 'vue' import pagination from './pagination.vue' // 分页组件 // import useVirtualScroll from './useVirtualScroll' const props = defineProps({ loading: { type: Boolean, default: false, }, maxHeight: { type: [String, Number], default: 720, }, data: { type: Array, default: () => [] }, // 显示已选数量 showCheckedCount: { type: Boolean, default: false, }, // 绑定的已选项数组 multipleSelection: { type: Array, default: () => [] }, // 可见的字段表头 ['filed1', 'filed2', 'filed3'] tableHeader: { type: Object, default: () => [] }, // 关闭自适应列宽 (用于解决列数小于3的表格在渲染时会出现数据抖动) closeAutoCloumnWidth: { type: Boolean, default: false }, // 使用分页器 showPagination: { type: Boolean, default: false }, // 分页配置 paginationConfig: { type: Object, default: () => { return { total: 0, currentPage: 1, pageSize: 10, pageSizes:[10, 30, 50, 100, 200, 500] } }, }, }) const emit = defineEmits([ "currentChange", "sizeChange", ]); interface IMyTableColumnProps { prop?: string label?: string fixed?: 'left' | 'right' | boolean visiable?: boolean index?: boolean } function isElTableColumn(vnode: VNode) { return (vnode.type as Component)?.name === 'ElTableColumn' } const table = ref() let tableHeader:any = {} let headerCount: number = 0 const slotsOrigin = useSlots() const attrs:any = useAttrs() const slots = computed(() => { /* 对 slot 进行分类 */ const main: VNode[] = [] // ElTableColumn 且存在 prop 属性 const left: VNode[] = [] // ElTableColumn 不存在 prop 属性,但 fixed="left" 或者为 selection选框 const other: VNode[] = [] // 其他 // 权限控制的可见列字段 let showKeys: string[] = []; // 方式一:只显示接口返回的字段判断 (设置了字段可见权限,接口不会返回该相关字段) if(props.data && props.data.length){ let tableDataItem: any = props.data[0] showKeys = Object.keys(tableDataItem) } let isNullData = showKeys.length || props.tableHeader ? false : true; // 空数据时正常渲染表头 // 方式二:用外部传来的表头字段 console.log('外部props.tableHeader', props.tableHeader) if(props.tableHeader){ tableHeader = JSON.parse(JSON.stringify(props.tableHeader)); } if(JSON.stringify(tableHeader) !== '{}'){ showKeys = Object.keys(tableHeader).map(v=>v.replace(/^./, (L) => L.toLowerCase())) // 首字母转小写 } slotsOrigin.default?.()?.forEach((vnode, index) => { if(!vnode.props){ vnode.props = {} } vnode.props.index = index; // 排序 if (isElTableColumn(vnode)) { if(vnode.props && vnode.props.prop){ if(!isNullData){ vnode.props.visiable = showKeys.indexOf(vnode.props.prop) === -1 ? false : true; } // 构建可见列表头并缓存起来 if(props.data && vnode.props.visiable){ tableHeader[vnode.props.prop] = vnode.props.label }else{ delete tableHeader[vnode.props.prop] } } const { prop, fixed, type } = vnode.props ?? {} if (prop !== undefined) return main.push(vnode) // if (type === 'selection' && vnode.props) vnode.props.reserveSelection = true; if (fixed === 'left' || type === 'selection') return left.push(vnode) } other.push(vnode) }) console.log('实际tableHeader',tableHeader) // 可见内容列少于3列则自适应宽度, 防止列数过少时撑不满table宽度出现断层 let showMain = main.filter(v=>{return v.props && v.props.visiable !== false}); if(!props.closeAutoCloumnWidth && showKeys.length && showMain.length < 3){ main.forEach(vnode=>{ if(vnode.props) vnode.props.width = '' }) key.value++ } if(!props.closeAutoCloumnWidth && !showMain.length && other.length && other[0].props){ other[0].props.width = '' key.value++ } return { main, left, other, } }) /* 列的排序与部分属性 */ const columns = reactive({ // slot 中获取的 slot: computed(() => slots.value.main.map(({ props }) => ({ prop: props!.prop, label: props!.label, fixed: props!.fixed, visiable: props!.visiable ?? true, })) ), // 渲染使用的 render: computed(() => { const res: IMyTableColumnProps[] = [] const slot = [...columns.slot] res.push(...slot) return res }), }) /* 重构 slot.main */ const refactorSlot = computed(() => { const { main } = slots.value /* 对 slot.main 进行改写 */ const refactorySlot: VNode[] = [] columns.render.forEach(({ prop, visiable, fixed }) => { if (!visiable) return const vnode = main.find((vnode) => prop === vnode.props?.prop) if (!vnode) return const cloned = cloneVNode(vnode, { fixed, }) refactorySlot.push(cloned) }) return refactorySlot }) /* 强制更新 el-table-column */ const key = ref(0) watch(refactorSlot, () => { if(Object.keys(tableHeader).length !== headerCount){ // 初始表头已构建好则无需更新,否则数据刷新时会抖动闪烁 headerCount = Object.keys(tableHeader).length; key.value += 1 nextTick(()=>{ table.value.doLayout() }) } }) /* 对外暴露的内容 */ defineExpose({ table, // el-table 实例的访问 columns: computed(() => readonly(columns.render)), updateColumns(value: IMyTableColumnProps[]) { }, }) const children = () => [...slots.value.left, ...refactorSlot.value, ...slots.value.other].sort((a: any, b: any)=>a.props.index - b.props.index) console.log(children()) // 合并分页配置 const _paginationConfig = computed(() => { const config = { total: 0, currentPage: 1, pageSize: 10, pageSizes: [10, 30, 50, 100, 200, 500], layout: "total, sizes, prev, pager, next, jumper", }; return Object.assign(config, props.paginationConfig); }); // 切换分页 const currentPageChange = (pageIndex: number) => { emit("currentChange", pageIndex); } const pageSizeChange = (pageSize: number) => { emit("sizeChange", pageSize); } // 虚拟滚动 // const { visibleData, initVirtualScroll, handleSelectionAll, addListeners, removeListeners, getRowKeys} = useVirtualScroll(); // watch(()=>props.data, ()=>{ // initVirtualScroll(table, JSON.parse(JSON.stringify(props.data))) // }) // onMounted(()=>{ // addListeners() // }) // onBeforeUnmount(()=>{ // removeListeners() // }) </script> <style lang="less" scoped> .operation-bar{ display: flex; justify-content: space-between; align-items: flex-end; .left-operation{ text-align: left; .checkedCount{ // padding-left: 10px; font-size: 14px; font-weight: 400; color: #606266; padding: 10px 0 10px 10px; } } } </style>
<template>
<el-pagination v-bind="pageConfig"></el-pagination>
</template>
<script lang="ts" setup>
import { defineProps } from "vue";
defineProps({
pageConfig: {
type: Object,
default: () => ({})
}
})
</script>
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