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ElementUI实现在下拉列表里面进行搜索
分析:
- 首先我们需要实现上图的效果,然后Element-UI的el-select是没有的,所以需要自己写
- 我们需要用到
el-popover组件,然后使用它的v-model="visible"来实现控制显示 - 我们在
el-popover的slot="reference"放一个el-select- 使用
popper-append-to-body="false"不需要插入浮动元素 - 使用
popper-class="hide-popper"定义浮窗class为hide-popper,并设置
display:none,这样选中了就不会存在el-select的下拉选项 el-option循环下面选择的list里面的元素,这样就可以在el-select展示选中的并存在删除el-select双向绑定的就是自定义选择的数组
- 使用
- html:
<template> <div class="arrbox"> <el-popover v-model="visible" placement="bottom-start" width="auto" > <div slot="reference" class="check-select"> <el-select ref="select" v-model="currentval" :style="{width:`${width}px`,height:`${height}`}" multiple :placeholder="placeholder" :popper-append-to-body="false" popper-class="hide-popper" style="width:100%" @visible-change="visibleChange" @focus="getFocus" > <el-option v-for="item in selectItem" :key="`${item.value}_k`" :label="item.label" :value="item.value" />el-select> div> <div class="selectMain" :style="{'min-width':`${width-20}px`}" @click="selectBxClick"> <div class="seachButton"> <el-select v-model="seachValue" placeholder=" 请选择筛选" style="width:70%;margin-right:10px;max-width:195px" @visible-change="selectBxClick()" > <el-option v-for="item in seachList" :key="item.value" :value="item.value" :label="item.label" /> el-select> <div class="btn" @click="seachBtn">搜索div> div> <div class="selectDiv"> <div v-for="item in list.filter(n=>n.value=='all')" :key="item.value" class="list" :class="[currentval.indexOf(item.value)!=-1?'selected':'',item.value=='all'?'allCheck':'']" @click="clickItem(item)">{{ item.label }}div> <div class="selectDivAuto"> <div v-for="item in list.filter(n=>n.value!='all')" :key="item.value" class="list" :class="[currentval.indexOf(item.value)!=-1?'selected':'',item.value=='all'?'allCheck':'']" @click="clickItem(item)">{{ item.label }}div> div> div> div> el-popover> div> template>- 1
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- js:
-
使用
getFocus获取是否聚焦,聚焦了让visible=true,这样就可以显示出自定义的下拉选择项 -
通过
visibleChange实施监听el-select,控制el-popover显示 -
在点击自定义的下拉选择项时,通过
@click="selectBxClick"让el-select一直聚焦,这样箭头就会一直向上 -
通过
@click="seachBtn"和getList获取列表,具体需要自己去自定义// 模拟获取的数据 const seachClickList = [{value: '1',label: '测试1',type: '1'},{value: '2',label: '测试2',type: '1'},{value: '3',label: '测试3',type: '1'},{value: '4',label: '测试4',type: '2'},{value: '5',label: '测试5',type: '2'},{value: '6',label: '测试6',type: '2'},{value: '7',label: '测试7',type: '2'}] export default { model: { prop: 'parentArr', event: 'change-parentArr' }, props: { parentArr: { type: Array, default() { return [] } }, // 传入选中的item,主要时防止list里面没有选中的数据 parentSelectItem: { type: Array, default() { return [] } }, width: { type: Number, default: 300 }, height: { type: Number, default: 30 }, placeholder: { type: String, default: '请输入' } }, data() { return { seachList: [ { value: '1', label: '条件一' }, { value: '2', label: '条件二' } ], visible: false, currentval: [], list: [], selectItem: [], seachValue: '1' } }, watch: { seachValue: { handler(value) { this.getList(value) }, deep: true, immediate: true }, parentArr: { handler(value) { this.currentval = value }, deep: true, immediate: true }, parentSelectItem: { handler(value) { this.selectItem = value.map(n => { if (n.value == 'all') { n.label = '全部' } return n }) }, deep: true, immediate: true }, currentval: { handler(value) { this.$emit('change-parentArr', value) } } }, created() { }, methods: { getList(value) { this.list = [{ label: '全部', value: 'all' }, ...seachClickList.filter(n => n.type == value)] this.getSelectItem() }, // 获取选中的item getSelectItem() { const noItemList = this.currentval.map(n => { if (this.selectItem.findIndex(i => i.value == n) == -1) { return n } return null }).filter(n => n != null) noItemList.forEach(item => { const index = this.list.findIndex(i => i.value == item) if (index != -1) { this.selectItem.push(this.list[index]) } }) }, getFocus() { this.visible = true }, visibleChange(data) { this.visible = data }, selectBxClick() { // 避免点击框体时组件消失 this.$refs.select.visible = true }, // 选择 clickItem(item) { const index = this.currentval.indexOf(item.value) if (index == -1) { if (item.value == 'all') { this.currentval = ['all'] this.selectItem = [{ label: '全部', value: 'all' }] } else { this.currentval.push(item.value) this.selectItem.push(item) const currentvalIndex = this.currentval.indexOf('all') const selectItemIndex = this.selectItem.findIndex(n => n.value == 'all') if (currentvalIndex != -1 && selectItemIndex != -1) { this.selectItem.splice(selectItemIndex, 1) this.currentval.splice(currentvalIndex, 1) } } } else { const itemIndex = this.selectItem.findIndex(n => n.value == item.value) this.selectItem.splice(itemIndex, 1) this.currentval.splice(index, 1) } }, // 搜索 seachBtn() { this.getList() } } }- 1
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css:
selected属性使用了el-select的样式,让样子尽量一致
.arrbox { display: inline-block; } .check-select{ ::v-deep.hide-popper{ display: none; } } ::v-deep .el-input__suffix{ i:not(.el-select__caret){ display: none; } } .selectMain { width: 100%; height: 100%; .seachButton{ width: 100%; align-items: center; display: flex; div.btn{ width: 25%; max-width: 70px; max-width: 80px; height: 40px; display: flex; align-items: center; justify-content: center; font-size: 12px; color: #fff; background-color: #409EFF; border-radius: 5px; cursor: pointer; } } .selectDiv{ width: 100%; max-width: 500px; margin-top: 10px; padding: 0 10px 0 0; .list{ width: 100%; padding: 10px 20px 10px 10px; color: #666; cursor: pointer; position: relative; &.selected{ color: #409EFF; &::after{ position: absolute; right: 0px; top: 50%; transform: translateY(-50%); font-family: element-icons; content: "\e6da"; font-size: 12px; font-weight: 700; -webkit-font-smoothing: antialiased; } } } .selectDivAuto{ width: calc(100% + 15px); max-height: 300px; overflow-y: auto; .list{ padding: 10px 30px 10px 10px; &.selected::after{ right: 10px; } } } } } .allCheck{ border-bottom: 1px solid rgb(228, 225, 225); }- 1
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-
使用
<template> <seachSelectInput v-model="from.tag" :parentSelectItem='selectItem' :width="302" placeholder="请选择标签" /> template> <script> import seachSelectInput from ./seachSelectInput' export default { components: { seachSelectInput }, data(){ return{ from:{ tag:['1'] }, selectItem:[ { value: '1', label: '测试1' } ] } } }- 1
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- 原文地址：https://blog.csdn.net/qq_40591925/article/details/128084179
