elementUI应用：实现“在下拉列表里面进行搜索功能”的应用。
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
html:
<template> <div class="arrbox"> <!-- 通过visible控制显示还是隐藏 --> <el-popover v-model="visible" placement="bottom-start" width="auto" > <div slot="reference" class="check-select"> <!-- popper-APPend-to-body:不需要插入浮动元素,popper-class:设置类名并隐藏 --> <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="`${item.value}_k`" :label="item.label" :value="item.value" /></el-select> </div> <!-- selectBxClick让select强制选中 --> <div class="selectMAIn" :style="{'min-width':`${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>
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() } } }
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);
}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' } ] } } }
大家试试吧。
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