基于Element封装一个表格组件tableList的使用方法

我们项目中使用的表格一般都比较类似,如果不进行封装的话,那么每个页面都可能有一些类似的代码。不仅浪费时间,而且由于开发人员不同的开发习惯。后期维护人员需要花费一点时间去看每个人的代码。所以我直接将表格做一个二次封装,只要一个人去维护这份代码即可。下面是我封装的内容

内容:

1、支持直接传入后台请求地址渲染列表,且参数修改之后自动刷新

2、支持自定义每一列的显示

3、支持根据内容自动撑开列宽

4、支持动态筛选表头

5、支持分页

6、防抖

7、列权限

...

更多请自行尝试

以下是tableList 组件的代码

<template>

<!--刷新按钮 和 筛选列的多选框 layout中要有 control 才显示,默认显示-->

<div class="table">

<div class="table-control" v-if="layoutKey.control">

<div class="table-control-title" @click="reload">

<i class="el-icon-refresh"></i></div>

<el-dropdown class="table-control-title">

<span class="el-dropdown-link"><i class="el-icon-s-operation table-control-icon"></i></span>

<el-dropdown-menu slot="dropdown" class="table-control-checkbox">

<el-checkbox-group v-model="headItems" @change="changeChecked">

<el-checkbox class="table-control-checkbox-item"

v-for="(item,index) in allColumn"

:label="item"

:key="index">{{item}}

</el-checkbox>

</el-checkbox-group>

</el-dropdown-menu>

</el-dropdown>

</div>

<!--列表主体-->

<el-table class="table" style="width: 100%"

ref="tableList"

:data="tableData"

:defaultSort.async="defaultSort"

v-bind="$attrs"

v-on="$listeners"

@selectionChange="selectionChange"

@sort-change="sortChange">

<ex-table-column v-if="layoutKey.expand" type="expand" fixed>

<slot name="expand" :data="props" slot-scope="props"/>

</ex-table-column>

<ex-table-column v-if="layoutKey.checkBox" fixed type="selection" :width="62"

:selectable="selectable"/>

<ex-table-column v-if="layoutKey.index" type="index" label="序号" width="60"/>

<ex-table-column v-for="(column,index) in activeColumn" :key="index"

:prop="column.field"

:column-key="column.field" :label="column.title" :fixed="column.fixed"

:sortable="column.sort" :selectable="column.selectable"

:show-overflow-tooltip="column.tooltip"

:autoFit='true' :width="column.width"

:fitByClass="autoWidth(column.width)"

:minWidth="column.minWidth || defaultWidth">

<slot :name="column.field" :data="scope.row" :field="column.field" :content="column.field"

:index="index" slot-scope="scope">

<div>{{$utils.nvl(scope.row[column.field],'--')}}</div>

</slot>

</ex-table-column>

</el-table>

<!--分页控件,layout中要有 control 才显示,默认显示-->

<el-pagination background small class="table-pagination"

:current-page.sync="page.pageNo"

:page-sizes="page.list"

:page-size="page.pageSize"

:layout="page.layout" :total="page.total"

@current-change="handleCurrentChange"

@size-change="handleSizeChange" v-if="layoutKey.page"/>

</div>

</template>

<script>

import debounce from 'lodash/debounce';

import ExTableColumn from './ExTableColumn';

export default {

components: { ExTableColumn },

// 提供出来给其他组件调用,具体用法参考 vue 官方用法

provide() {

return {

tableList: this,

};

},

props: {

// 默认的表格大小

defaultWidth: {

type: Number,

required: false,

default: 100,

},

// 显示的控件,目前就page,control 两个可选,可根据需求自行扩展

layout: {

default: 'page,control',

},

// 多选时 返回的key,默认id

checkKey: {

type: [Number, String],

default: () => 'id',

},

// 请求参数,必填

req: {

type: Object,

required: true,

default: () => ({

url: undefined,

type: 'post',

params: {

query: {},

},

pageNo: 1,

pageSize: 1,

}),

},

// 默认排序,参考 elementUI table 用法

defaultSort: {

type: [String, Object],

required: false,

},

// 列表显示的列

// {

title : 必填 String, 显示的列名

field : 必填 String , 列中的key

width : 选填,String 列宽,单位像素,

fixed : 选填,String 是否固定的列,可选 right, left

sort : 选填,Boolean 是否可排序

expend: 选填,Boolean 是否可展开,配置slot:expand 显示展开内容

limit : 选填,Boolean 权限控制,false 则不显示

}

columns: {

type: Array,

required: true,

default: () => [{ title: '操作', field: 'ctrl', width: '60', fixed: 'right' }],

},

// 这一行的 CheckBox 是否可以勾选,用法参考elementUI table用法

selectable: {

type: Function,

default: () => true,

},

// 其他table参数,都会传给table

},

data() {

return {

layoutKey: {},

page: {

list: [5, 10, 20, 50, 100],

total: null,

pageSize: 10,

pageNo: 1,

layout: 'total,sizes,prev,pager,next,jumper',

},

tableData: [],

sort: '',

checkRows: [],

checkKeys: [],

headItems: [],

allColumn: [],

activeColumn: [],

};

},

methods: {

sortChange({ prop, order }) {

this.sort = `${prop} ${order === 'descending' ? 'desc' : 'asc'}`;

this.refresh();

},

selectionChange(selection) {

this.checkRows = selection;

this.checkKeys = [];

selection.map((row) => {

this.checkKeys.push(row[this.checkKey]);

return true;

});

this.$emit('selectionChange', selection);

},

/** **************************method*********************************** */

// 分页

async handleCurrentChange(currentPage) {

this.page.pageNo = currentPage;

this.$emit('handleCurrentChange', currentPage);

await this.initTable({ vm: this });

},

handleSizeChange(size) {

this.page.pageSize = size;

this.page.pageNo = 1;

this.$emit('handleSizeChange', size);

this.initTable({ vm: this });

},

/** *****************************动态渲染头部************************************* */

// 取消选中菜单

changeChecked() {

this.changeColumn({ vm: this });

},

changeColumn: debounce(async ({ vm }) => {

const that = vm;

const keys = new Set(vm.headItems);

const activeColumn = vm.columns.filter((item) => {

if (keys.has(item.title)) {

return true;

}

return false;

});

that.activeColumn = activeColumn;

that.activeColumn.splice(1, 0);

}, 200),

/** *****************************刷新************************************* */

// 刷新表格数据(使用现有参数)

refresh(type) {

if (type === 'delete' && this.page.pageNo > 1 && this.tableData.length === 1) {

this.page.pageNo = this.page.pageNo - 1;

}

this.initTable({ vm: this });

},

// 重新加载数据(重置到第一页)

reload() {

if (this.page.pageNo !== 1) {

this.page.pageNo = 1;

}

this.initTable({ vm: this });

},

initTable: debounce(async ({ vm }) => {

const that = vm;

that.tableData = [];

const params = that._.assign({

pageNo: that.page.pageNo,

pageSize: that.page.pageSize,

sortStr: that.sort

}, that.req.params); // 右值覆盖左值,返回左值

// 发起请求,根据实际项目中,接口来做

const { data } = await window.axios[that.req.type || 'post'](that.req.url, params);

if (data && that.$utils.Type.isArray(data.result)) {

that.tableData = data.result;

that.page.total = data.total * 1;

}

that.$nextTick(() => {

that.$emit('loadDone', that.tableData, params);

});

}, 300),

getCheckRows() {

return this.checkRows;

},

getCheckKeys() {

return this.checkKeys;

},

handleHead(columns) {

const allColumn = [];

columns.map((item) => {

if (!item.limit) {

allColumn.push(item.title);

}

return true;

});

this.headItems = allColumn;

this.allColumn = allColumn;

this.changeChecked();

},

handleLayout() {

const layout = this.layout;

if (!layout) return null;

layout.split(',')

.map(

(item) => {

const key = item.trim();

this.layoutKey[key] = true;

return true;

},

);

return this.layoutKey;

},

autoWidth(width) {

if (this.$utils.isEmpty(width)) {

return 'cell';

}

return width;

},

init() {

this.handleLayout();

this.handleHead(this.columns);

if (this.defaultSort) {

const { prop, order } = this.defaultSort;

this.sort = `${prop} ${order === 'descending' ? 'desc' : 'asc'}`;

}

this.initTable({ vm: this });

}

,

},

async created() {

this.init();

},

watch: {

queryParams: {

handler() {

this.reload({ vm: this });

},

},

columns: {

handler() {

this.handleHead(this.columns);

},

},

},

computed: {

queryParams() {

if (this.$utils.isNotEmpty(this.req.params)) {

return this.req.params;

}

return {};

},

},

};

</script>

<style lang="less" scoped>

@import './style/index';

</style>

使用方法

<template>

<div>

<table-list

:req="tableReq"

ref="tableList"

:stripe="true" // table 原来的参数也是支持使用的,方法也支持使用。

:columns="[

{title:'用户名',field:'name',sort:'true',fixed:true},

{title:'英文名',field:'aliasName',sort:'true',fixed:true},

{title:'年龄',field:'age', sort:true},

{title:'职业',field:'job', sort:true},

{title:'邮箱',field:'email'},

{title:'出生日期',field:'birthday'},

{title:'家庭住址',field:'address'},

{title:'户籍',field:'domicile'},

]">

<!--格式化时间列,所有的列都可以这么使用,slot 名为列field-->

<template slot="birthday" slot-scope="{data}">

<span>{{format(data.birthday)}}</span>

</template>

</table-list>

</div>

</template>

<script>

import TableList from './table/components/TableList';

export default {

name: 'HelloWorld',

components: { TableList },

data() {

return {

tableReq: {

url: '/user/list', //必填

type: 'post', //可选, 默认 post

params: {} // 可选

}

};

},

methods: {

format(time) {

if (this.$utils.isEmpty(time)) return '/';

return this.$utils.format(new Date(time), 'yyyy-MM-dd HH:mm');

},

},

mounted() {

}

};

</script>

以下是显示效果

到此这篇关于基于Element封装一个表格组件tableList的使用方法的文章就介绍到这了,更多相关Element tableList内容请搜索以前的文章或继续浏览下面的相关文章希望大家以后多多支持!

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