最终效果(:3000/mult_group_selection)见下图。实际就是将element三种官方select实例整合起来,同时实现分组+多选+可搜索,此外点击一级分组名可以实现全选/全不选。供有相关需求的开发者参考
准备工作:
除了vue脚手架、element等必要包之外。该项目还用到了linq.js(https://github.com/mihaifm/linq),该工具可以快速从数组中查找所需内容。
npm install --save linq
编辑build/webpack.base.conf.js
module:{ ...... //添加 new webpack.ProvidePlugin({ Enumerable: "linq" }) }
数据源格式:
var selectList = [ { name:"",//一级名称 CName:"", //二级名称 value:"" //值 }, {name:"",CName:"",value:""}, ...... ]
实现:
script
data (){ return{ selectModel: [], multipleSelectOption:[], } }, methods:{ //将源数据转成element所需格式 transMultipleSelectOption(){ var level1List = Enumerable.from(this.allSelectList).distinct("o=>o.name").toArray(); var newArr = level1List.map(item=>{ let children = Enumerable.from(this.allSelectList).where((o)=>{return o.name==item.name;}).toArray(); var options = children.map(itemc=>{ return {"name": itemc.CName, "value":itemc.value}; }); return {"name": item.name, "options":options} }); this.multipleSelectOption = newArr; }, //重置options(select自动补全相关) remoteMethod(queryString, lists) { //lists:原始数据 var mappedList = Enumerable.from(lists).where((o)=>{return o.CName.indexOf(queryString)!=-1 || o.name.indexOf(queryString)!=-1;}).toArray(); //找出匹配搜索关键字的数据集 var level1List = Enumerable.from(mappedList).distinct("o=>o.name").toArray(); //从所匹配的数据集中找出所有一级菜单集合(含去重) //重新拼成element所需的数据格式 var newArr = level1List.map(item=>{ let children = Enumerable.from(mappedList).where((o)=>{return o.name==item.name;}).toArray(); var options = children.map(itemc=>{ return {"name": itemc.CName, "value":itemc.value}; }); return {"name": item.name, "options":options} }); this.multipleSelectOption = newArr; }, //点击一级菜单全选/全不选实现 checkAll(value){ //value: 点击的一级name var list = Enumerable.from(this.multipleSelectOption).where((o)=>{return o.name==value;}).toArray(); var level2ValueList = Enumerable.from(list[0].options).select("o=>o.value").toArray(); //所有该一级下二级的value集合 var num=0; level2ValueList.forEach((value)=>{ this.selectModel2.forEach((model, index)=>{ if(model==value){ this.selectModel2.splice(index, 1); //如有匹配,先删除 num++; return true; } }) }) if(num < level2ValueList.length){ //需要全选 this.selectModel2 = this.selectModel2.concat(level2ValueList); //合并数组 } } }, mounted: function(){ this.transMultipleSelectOption(); },
template
<el-select v-model="selectModel" multiple filterable remote reserve-keyword placeholder="请输入关键词" :remote-method="(queryString)=>{ remoteMethod(queryString, allSelectList); }"> <el-option-group v-for="group in multipleSelectOption" :key="group.name" :label="group.name" @click.native="checkAll(group.name)"> <el-option v-for="item in group.options" :key="item.value" :label="item.name" :value="item.value"> </el-option> </el-option-group> </el-select>