本篇文章主要介绍vue添加标签，废话不多说了，下面上具体代码

效果如下：

html

<div id="app"><div style="margin-bottom: 4px;"> <span class="selectedItem" v-for="item in selectedItems">{{item.name}} <i class="red fa fa-close (alias)" v-on:click="deleteSelectedItem($index)"></i></span> <input v-model="inputItem" type="text" v-on:focus="showDropmenu" v-on:keyup.enter="addItem"></div><div v-show="isShowDropmenu"> <button v-for="item in cataName" v-on:click="showCataList($index)">{{item.name}}</button> <button v-on:click="hideDropmenu"><i class="red fa fa-close (alias)"></i></button> <div v-for="item in cataList" v-show="item.isShow"> <span v-for="one in item.items" class="item" v-on:click="addByClick(one)">{{one}}</span> </div></div></div>

js

new Vue({ el:'#app', data:{ selectedItems: [{ name: 'NodeJs' }], isShowDropmenu: false, inputItem:'', cataName:[{name:'开发语法'}, {name: '系统设备'}], cataList:[{ isShow: true, items:['js','c++','java'] },{ isShow: false, items:['windows','chrome','linux'] }] }, methods:{ showDropmenu: function(event){ console.log('showDropmenu'); this.isShowDropmenu = true; }, hideDropmenu: function(event){ this.isShowDropmenu = false; console.log('hideDropmenu'); }, test: function(){ console.log('test'); }, addItem: function(){ this.selectedItems.push({name: this.inputItem}); this.inputItem = ""; }, deleteSelectedItem: function(index){ this.selectedItems.splice(index, 1); }, showCataList: function(index){ var i = this.cataList.length; while(i--){ i === index ? this.cataList[i].isShow = true: this.cataList[i].isShow = false; } }, addByClick: function(name){ var i = this.selectedItems.length; while(i--){ if(this.selectedItems[i].name === name){ return; } } this.selectedItems.push({name: name}); } } });

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。