<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title> vue百度下拉列表</title> <style> .gray{ background: #ccc; } </style> <script src="https://www.jb51.net/article/vue.js"></script> <script src="https://www.jb51.net/vue-resource.js"></script> <script> window.onload=function(){ new Vue({ el:'body', data:{ myData:[], t1:'', now:-1//按上下键，当前选中 }, methods:{ get:function(ev){ if(ev.keyCode==38 || ev.keyCode==40)return; if(ev.keyCode==13){ window.open('https://www.baidu.com/s?wd='+this.t1); this.t1=''; } this.$http.jsonp('https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su',{ wd:this.t1 },{ jsonp:'cb' }).then(function(res){ this.myData=res.data.s; },function(){ }); }, changeDown:function(){ this.now++; if(this.now==this.myData.length)this.now=-1//走到最下面那个，就返回最上面那个; this.t1=this.myData[this.now];//搜索框的值对应变化 }, changeUp:function(){ this.now--; if(this.now==-2)this.now=this.myData.length-1; this.t1=this.myData[this.now]; } } }); }; </script> </head> <body> <div> <input type="text" v-model="t1" @keyup="get($event)" @keydown.down="changeDown()" @keydown.up.prevent="changeUp()"> <!--搜索框的光标会默认定位到文字前面，这里@keydown.up.prevent阻止默认事件--> <ul> <li v-for="value in myData" :class="{gray:$index==now}"> {{value}} </li> </ul> <p v-show="myData.length==0">暂无数据...</p> </div> </body> </html>
