实现淘宝搜索框的效果，首先得去淘宝找端口，然后对取到的数据进行处理。

就如图所示：
这样 的数据有三层，对于数据的处理要特别注意

css代码：

#box{position: relative; margin: 30px 300px;} *{margin: 0; padding: 0;} #txt{width: 500px; height: 30px; border-top-left-radius: 15px; border-bottom-left-radius: 15px; border: 1px solid red;} #sou{width: 50px; height: 30px; border: 1px solid red; display: block; position: absolute; left: 496px; top: -5px; text-align: center; line-height: 30px; border-top-right-radius: 15px; border-bottom-right-radius: 15px; background: red;} #btn{ border: none; background: red; color: white;} #list{width: 500px; border: 1px solid #CECECE; display: none;} #list li{list-style: none;} #list li:hover{background: #CECECE;} #menu{position: absolute; top: 60px; left: 252px; background: #CECECE; width: 250px;} #topMenu{width: 250px;} #bottomMenu{width: 250px;} span{width: 60px; height: 30px; border: 1px solid #000; display: block; float: left; margin: 5px; font-size: 12px; text-align: center; line-height: 30px; cursor: pointer;} span:hover{background: red;} a{text-decoration: none; color: #000; line-height: 30px;}

html代码：

<div id="box"> <input type="text" id="txt" placeholder="女装"/> <span id="sou"> <button id="btn">搜索</button> </span> <ul id="list"> </ul> <div id="menu"> <div id="topMenu"></div> <div id="bottomMenu"></div> </div> </div>

JavaScript代码：
let oTxt = document.getElementById("txt");
let oList = document.getElementById("list");
let oMenu = document.getElementById("menu");
let oTop = document.getElementById("topMenu");
let oBot = document.getElementById("bottomMenu");
oTxt.oninput = function() {
var oScript = document.createElement("script");
oScript.src = "https://suggest.taobao.com/sug?code=utf-8&q=" + oTxt.value + "&callback=jsonp&area=c2c";
document.body.appendChild(oScript);
document.body.removeChild(oScript);
}
function jsonp(data) {
//console.log(data)
data1 = data.result;            
data2 = data.magic;
let str = "";      
oList.innerHTML = "";    
for(let i = 0; i < data1.length; i++) {
str += "<li><a href='https://s.taobao.com/search?q=" + data1[i][0] + "'>" + data1[i][0] + "</a></li>";   
}    
//console.log(str);        
oList.innerHTML = str;
oList.style.display = "block";
var aLi = oList.children;

for(let i=0; i<data2.length; i++){ aLi[data2[i].index - 1].innerHTML += ">"; aLi[data2[i].index - 1].onmouseover = function(){ var str1 = ""; for(var j = 0; j < data2[i].data[0].length; j++){ str1 += "<span>"+data2[i].data[0][j].title+"</span>" } oTop.innerHTML = str1; var str2 = ""; for(var j = 0; j < data2[i].data[1].length; j++){ str2 += "<span>"+data2[i].data[1][j].title+"</span>" } oBot.innerHTML = str2; } } }