vue组件实现可搜索下拉框扩展

本文实例为大家分享了vue组件实现可搜索下拉框的具体代码，供大家参考，具体内容如下

一、效果

<template>
 <div class="vue-dropdown-ext" :class="themestyle" v-show-extend="show">
 <div class="search-module clearfix" v-show="length">
 <input class="search-text" @keyup='search($event)' 
 :placeholder="placeholder" />
 <span class="glyphicon glyphicon-search search-icon"></span>
 </div>
 <ul class="list-module" v-show="length" :>
 <li v-for ="(item,index) in datalist" @click="appClick(item,$event)" 
 :key="index" :title="item.name">
 <span v-if="addIcon" :class="iconClass"></span>
 :>{{item.name}}</span>
 <span v-if="statusIconType == 'text' && hasStatus" 
 :class="item.statusClass">{{item.statusText}}</span>
  :class="item.statusClass"></span>
 </li>
 </ul>
 <div class="tip__nodata" v-show="!datalist.length">{{nodatatext}}</div>
 </div>
</template>

<script>
 export default {
 data(){
 return {
 _datalist:this.itemlist.concat(),
 datalist:this.itemlist.concat(),
 length:this.itemlist.length
 }
 },
 props:{
 'show':{//用于外部控制组件的显示/隐藏
 type:Boolean,
 default:true
 },
 'itemlist':Array,
 'placeholder':String,
 'nodatatext':String,
 'themestyle':{
 type:String,
 default:'default-theme'
 },
 'item-text-style':{
 type:Object,
 default:function(){
  return {
  width:'80%'
  }
 }
 },
 'add-icon':{
 type:Boolean,
 default:true
 },
 'icon-class':{
 type:String,
 default:''
 },
 'has-status':{
 type:Boolean,
 default:false
 },
 'status-icon-type':{
 type:String,
 default:'text'//text or icon
 },
 'max-h':{
 type:Number,
 default:$(window).height()-400
 }
 },
 directives:{
 'show-extend':function(el,binding,vnode){//bind和 update钩子
 let value = binding.value,searchInput = null;
 if(value){
  el.style.display='block';
 }else{//隐藏后，恢复初始状态
  el.style.display='none';
  searchInput = el.querySelector(".search-text");
  searchInput.value = '';
  //还原渲染数据
  vnode.context.datalist = vnode.context.itemlist;
 }
 }
 },
 methods:{
 appClick:function(data,event){
 this.$emit('item-click',data,event);
 },
 search:function(e){
 let vm = this,searchvalue = e.currentTarget.value;
 vm.datalist = vm.$data._datalist.filter(
 function(item,index,arr){
  return item.name.indexOf(searchvalue) != -1;
 });
 },
 statusIconClass:function(status){
 let statusClass = '';
 return statusClass;
 }
 },
 mounted:function(){

 }
 }
</script>

<style lang="scss" scoped>
 .text-overflow__style {
 overflow: hidden;
 white-space: nowrap;
 text-overflow: ellipsis;
 }
 .vue-dropdown-ext {

 .search-module {
 position: relative;
 .search-text {
 width: 100%;
 height: 30px;
 padding-right: 2em;
 padding-left:0.5em;
 box-shadow: none;
 border: 1px solid #ccc;
 background: #fff;
 &:focus {
  border-color: #2198f2;
 }
 }

 .search-icon {
 position: absolute;
 top: 24%;
 right: 0.5em;
 color: #aaa;
 }

 }

 .list-module {
 overflow: auto;
 li {
 position: relative;
 margin-top: 0.5em;
 padding: 0.5em;
 border: 1px solid #ccc;
 white-space: nowrap;

 &>span {
  display: inline-block;
  vertical-align: middle;
 }

 }
 }

 .tip__nodata {
 font-size: 12px;
 margin-top: 1em;
 }

 &.default-theme {
 .list-module li {
 &:hover {
  cursor: pointer;
  border-color: #00a0e9;
 }

 &.active {
  border-color: #00a0e9;
  color: #00a0e9;
 }
 }

 }
 }
</style>