vue+element实现下拉菜单并带本地搜索功能示例详解
作者：周家大小姐.
这篇文章主要介绍了vue+element实现下拉菜单并带本地搜索功能,本文通过实例代码给大家介绍的非常详细，对大家的学习或工作具有一定的参考借鉴价值，需要的朋友可以参考下
需求:
后台返回数组对像,前端组合成数组,根据name组合成一个个数组并把后台返回的值当成一个children推入数组,在数组中自定义属性备份数据防止搜索的时候改变原数组使得数组无法回退
这里是用的vuex存储,因为多个页面使用同一个接口;所以没必要重复请请求
src\store\module\metadata.js
/*
* @Author: your name
* @Date: 2021-09-02 15:46:45
* @LastEditTime: 2021-09-16 17:39:53
* @LastEditors: Please set LastEditors
* @Description: 控制台-数据接入-悬浮菜单
* @FilePath: \vue-ui\src\store\module\metadata.js
*/
/**
* 数据资源管理悬浮菜单数据
*/
import { Loading, Message } from 'element-ui'
import { apiManager } from '@/plugins/ajax'
let loadingInstance
const state = {
allList: [],
navList: [],
name: {}
}
const mutations = {
SET_NAVLIST: (state, list) => {
// 使用深拷贝,防止页面搜索时报错
state.navList = list.map(item => {
if (item.children) {
item.backList = JSON.stringify(item.children)
}
})
},
SET_ALLLIST: (state, list) => {
state.allList = list
},
SET_NAME: (state, obj) => {
Object.assign(state.name, obj)
}
}
const actions = {
requestMetadata({ commit, state }, { name, navList }) {
return new Promise(resolve => {
const nameKey = Object.keys(state.name)
if (nameKey.indexOf(name) !== -1) {
//阻止重复请求
resolve(state.name[name])
} else {
loadingInstance = Loading.service()
state.name[name] = name
apiManager
.post('/metadata/tableInfo/query')
.then(res => {
commit('SET_ALLLIST', res.data)
for (const i in res.data) {
const item = navList.find(v => v.name === i) //把传入的name和请回来的key(name)匹配放入
if (item) {
item.children = res.data[i] //把请求回来的每个对象下的数组放入对应的Item.children中
item.navSearch = ''
item.backList = [] //建立备份,在搜索的时候防止改变原数组
}
}
commit('SET_NAVLIST', navList)
commit('SET_NAME', { [name]: navList })
resolve(navList)
loadingInstance.close()
})
.catch(err => {
resolve([])
loadingInstance.close()
Message.error(err)
})
}
})
}
}
export default {
namespaced: true,
state,
mutations,
actions
}
页面父组件使用子组件
src\views\console\dataAccessManage\dataResourceTable\FileXs.vue
<transition name="component-fade" mode="out-in"> <floating-menu v-show="isCollapse" :newList='navList' @getDatails='getDatails' /> </transition>
data() {
return {
navList: [
{
imgSrc: require('./../../../../../public/images/m6.png'),
name: 'ftp',
typeName: 'FTP服务器',
children: [],
total: 0
},
{
imgSrc: require('./../../../../../public/images/m5.png'),
name: 'txt',
typeName: '文件服务器',
children: [],
total: 0
}
],
},
async mounted() {
const param = {
name: 'fileXs',
navList: this.navList
}
// 请求vuex
this.navlist = await this.$store.dispatch('metadata/requestMetadata', param)
},
子组件
src\views\console\dataAccessManage\components\floatingMenu.vue
<!--
* @Author: your name
* @Date: 2021-09-02 14:01:58
* @LastEditTime: 2021-09-16 17:43:10
* @LastEditors: Please set LastEditors
* @Description: 数据资源表中悬浮菜单
* @FilePath: \vue-ui\src\views\console\dataAccessManage\components\floatingMenu.vue
-->
<template>
<div class="data-sheet-main__nav" v-if="sjktcList.length || newList.length">
<div>
<div class="nav__item" v-for="(item,index) in sjktcList" :key="'info2-' + index">
<div class="item_name sjk_name" :class="{ sjk_active: sjkActive == index }" @click="sjktcShow(item.type,index)">{{item.typeName}}</div>
</div>
</div>
<!-- file -->
<el-collapse class="nav__item" v-model="activeNames">
<el-collapse-item class="item_name" :title="item.typeName" :name="item.typeName" v-for="(item,index) in newList" :key="index">
<ul class="nav__item__list">
<li class="list__li">
<el-input v-input-val-bg v-model="item.navSearch" @input="handleNavSearch(item)" prefix-icon="el-icon-search" size="mini" placeholder="请输入关键字" clearable></el-input>
</li>
<li v-for="(key,i) in item.children" :key="i" :class="{ 'list__li--active': key.id == dbId }" class="list__li" @click="getDatails(key,item)">
<span :title="key.name" class="list--title">{{key.name}}</span>
<span class="list--count">{{key.total || 0}}</span>
</li>
<li class="no-data" v-if="!item.children.length">暂无数据</li>
</ul>
</el-collapse-item>
</el-collapse>
</div>
</template>
<script>
import { debounce } from '@/utils'
export default {
name: 'floatingMenu',
props: {
sjktcList: {
type: Array,
default: () => []
},
newList: {
type: Array,
default: () => []
}
},
components: {},
data() {
return {
sjkActive: 0,
navSearch: '',
navChildData: [],
dbId: '',
activeNames: []
}
},
mounted() {
},
methods: {
// 点击列表中的内容
getDatails(args, db) {
this.dbId = args.id
this.$emit('getDatails', { args, db })
},
// eslint-disable-next-line space-before-function-paren
handleNavSearch: debounce(function (obj) {
this.$forceUpdate()//防止input框赋值失败
const currlist = JSON.parse(obj.backList)
if (obj.navSearch == '') {
obj.children = currlist
} else {
obj.children = currlist.filter(item => {
return item.name.toLowerCase().indexOf(obj.navSearch.toLowerCase()) != -1
})
}
}, 100),
sjktcShow(type, i) {
this.sjkActive = i
this.$emit('sjktcShow', [type])
}
},
watch: {
newList: {
deep: true,
handler(list) {
if (list) {
// 默认激活显示展开list下的0个菜单
for (let i = 0; i < list.length; i++) {
const item = list[i]
if (!this.dbId && item.children.length) {
this.activeNames = item.typeName
this.getDatails(item.children[0], item)//默认请求第一条数据内容
}
}
}
}
}
}
}
</script>
<style lang='scss' scoped>
.data-sheet-main__nav {
width: 180px;
position: absolute;
top: 0px;
left: -190px;
z-index: 100;
background: #fff;
border: 1px solid #6579fe;
padding-top: 10px;
.sjk_active {
color: $theme !important;
}
.nav__item {
position: relative;
margin-bottom: 15px;
.item_name {
width: 100%;
display: inline-block;
padding-left: 17px;
font-size: 14px;
line-height: 24px;
color: rgba(0, 0, 0, 0.85);
/deep/.el-collapse-item__header {
font-weight: bold;
border-bottom: none;
position: relative;
padding-left: 15px;
.el-collapse-item__arrow {
position: absolute;
left: 0;
transform: rotate(270deg);
}
.el-collapse-item__arrow.is-active {
transform: rotate(90deg);
}
}
&:hover {
cursor: pointer;
}
}
.no-data {
text-align: center;
color: #999;
padding: 10px 0;
width: 100%;
}
img {
width: 100%;
height: 50px;
}
.nav__item--total {
position: absolute;
display: block;
width: 30px;
height: 30px;
background: #fff;
border: 1px solid #ccc;
border-radius: 50%;
line-height: 30px;
border: 1px solid #71b1ec;
box-shadow: 0 3px 6px #156d90;
text-align: center;
color: #fd0b0b;
font-size: 16px; /*no*/
top: 0;
right: 0;
transform: translate(25%, -20%);
}
.nav__item__list {
display: flex;
max-height: 246px;
overflow-y: auto;
flex-wrap: wrap;
.list__li {
width: 100%;
margin-top: 5px;
line-height: 30px;
padding: 0 6px 0 17px;
position: relative;
cursor: pointer;
color: #333;
&:hover {
color: $blue;
}
.list--title {
width: 90px;
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
float: left;
&:hover {
color: #409eff;
}
}
.list--count {
color: #46a0fc;
float: right;
}
}
.list__li--active {
color: $blue;
}
}
}
/deep/.el-collapse {
border-top: none;
}
}
.data-sheet-main__list {
flex: 1;
margin-left: 20px;
.list-header {
flex-direction: column;
.order {
text-align: right;
a {
background: #6579fe;
font-family: PingFangSC-Regular;
font-size: 12px;
line-height: 22px;
color: #ffffff;
padding: 6px;
border-radius: 4px;
}
}
}
.handler--fixed-right {
padding: 25px 10px;
}
.nodata {
text-align: center;
font-size: 16px;
}
}
</style>
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