Examples to explain how JS implements Baidu search function-JS Tutorial-php.cn

This article mainly introduces to you how to implement Baidu search function with js. The code is divided into html part and css folding style part. Please refer to this article for the specific implementation code. I hope it can help you.

Today we will use JS to implement Baidu search function. The code is as follows:

HTML part:

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <!--百度iocn图标-->
    <link rel="shortcut icon" href="https://www.baidu.com/favicon.ico" rel="external nofollow" type="image/x-icon"/>
    <title>百度一下,你就知道</title>
    <link rel="stylesheet" href="css/baidu.css" rel="external nofollow" />
    <script src="js/H.js"></script>
  </head>
  <body onload="onloads(),randomBack()">
    <p class="box">
      <p class="box_log">
        <p class="box_log_img">
          <img src="img/superlogo_c4d7df0a003d3db9b65e9ef0fe6da1ec.png"/>
        </p>
      </p>
      <p class="box_text">
        <p class="box_text_content">
          <input type="text" name="text" id="text" value="" autofocus="autofocus"/>
          <input type="button" name="bdyx" id="btn" value="百度一下" />
          <ul id="search">
            <li class="li1" id="0" onclick="iptShow(this.id)"></li>
            <li class="li1" id="1" onclick="iptShow(this.id)"></li>
            <li class="li1" id="2" onclick="iptShow(this.id)"></li>
            <li class="li1" id="3" onclick="iptShow(this.id)"></li>
            <li class="li1" id="4" onclick="iptShow(this.id)"></li>
            <li class="li1" id="5" onclick="iptShow(this.id)"></li>
            <li class="li1" id="6" onclick="iptShow(this.id)"></li>
            <li class="li1" id="7" onclick="iptShow(this.id)"></li>
            <li class="li1" id="8" onclick="iptShow(this.id)"></li>
            <li class="li1" id="9" onclick="iptShow(this.id)"></li>
          </ul>
        </p>
      </p>
    </p>
    <script type="text/javascript" src="js/index.js" ></script>
  </body>
</html>

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CSS cascade Style part:

body{/*清除浏览器自带样式*/
  margin: 0;
  padding: 0;
  /*background-repeat: no-repeat;*/
  min-width: 1200px;
}
.box{/*最大的盒子*/
  width: 100%;
  height: 100%;
  /*background: yellow;*/
  /*height: 636px;*/
}
.box_log{/*log盒子*/
  width: 100%;
  height: 250px;
  text-align: center;
}
.box_log_img{
  margin:0 auto;
  width: 300px;
  height: 150px;
}
.box_log img{
  width: 300px;
  height: 150px;
  margin-top: 38px;
  margin-bottom: 19px;
}
.box_text{/*text搜索框盒子大小*/
  width: 100%;
  height: 36px;
}
.box_text_content{
  width: 640px;
  height: 36px;
  margin: 0 auto;
}
 
#text{ /*input框的样式*/
  width: 540px;
  height: 36px;
  box-sizing: border-box;
  margin-top: 3px;
  text-indent: 4px;
  outline: none;
}
.log_img{/*input框中的小相机*/
  position: absolute;
  left: 62%;
  top: 35.5%;
}
#btn{ /*按钮的样式*/
  width: 100px;
  height: 36px;
  background: #3385FF;
  border: 0px;
  letter-spacing: 1px;
  color: white;
  margin-left: -5px;
  font-size: 15px;
  box-sizing: border-box;
  transform: translateY(1.5px);
  box-sizing: border-box;
}
#btn:hover{ /*当按钮hover的样式*/
  cursor: pointer;
}
#search{  /*搜索框的样式*/
  width: 540px;
  margin: 0;
  padding: 0;
  list-style: none;
  display: none;
  border: 1px solid #E3E5E4; 
}
#search li{ /*搜索框li的大小颜色*/
  line-height: 36px;
  background: white;
}
#search li:hover{ /*当li hover的样式*/
  background: #F0F0F0;
}
.li1{ /*li中的值缩进*/
  text-indent: 4px;
}

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JS part:

var otext = document.getElementById("text"); //获取input框
ose = document.querySelector("#search"); //通过类名选择器 选择到search框
lis = document.getElementsByClassName("li1"); //获取所有的li
otext.onkeyup = function(){  //当在input框中键盘弹起发生事件
  ose.style.display = otext.value?"block":"none"; /*三目运算符,如果otext.value的值部位空,则block。*/
  var osc = document.createElement("script"); /*创建一个script标签*/
  osc.src = "https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su?wd="+otext.value+"&cb=houxiaowei";
  /*srcipt的src值引入百度的url,然后将otext文本框中输入的内容连接到url,在后面在运行自己的方法*/
  document.body.appendChild(osc);
  /*将创建好的script标签元素放入body中*/
  /*input框中按下回车根据input的值跳转页面*/
  if(event.keyCode==13){
    /*将百度作为连接,传入input的值,并跳入新的页面*/
    window.location.href = "https://www.baidu.com/s?ie=utf-8&f=8&rsv_bp=1&rsv_idx=1&tn=baidu&wd="+otext.value
  }
}
var count = 0;
var search = 0;
var arr = ose.children; /*获取ose下的所有li*/
function houxiaowei(json){
  var jsonLength = 0; /*json长度的初始值*/
//          console.log(json.s);
  for(var x in json.s){  /*将循环的次数变成json的长度*/
    jsonLength++;
  }
//          console.log(jsonLength);
  for(var i=0;i<lis.length;i++){
    if(jsonLength==0){ /*如果遍历出的长度等于0,li的值为空*/
      arr[i].innerHTML = null;  
    }else{
      if(json.s[i]!=null){/*如果json[i]的值不等于空,则将它的值放入li中*/
        arr[i].innerHTML = json.s[i];
      }
    }
  }
  if(count==lis.length-1){
    count=0;
    search=0;
  }
  count++;
  search++;
}
/*单击li中的值显示在input框中*/
function iptShow(thisId){
  otext.value = arr[thisId].innerHTML;
  window.location.href = "https://www.baidu.com/s?ie=utf-8&f=8&rsv_bp=1&rsv_idx=1&tn=baidu&wd="+otext.value
}
otext.onclick = function(e){
  ose.style.display = "block";
  var e = event || window.event;
  e.stopPropagation();  //阻止冒泡事件,除了IE8及以下不兼容,其他浏览器都兼容
  e.cancelBubble=true; //阻止冒泡事件,IE8及以下兼容
//        alert(e);
}
/*单击body中的任意地方隐藏li*/
document.body.onclick = function(){
  ose.style.display = "none";
}
/*单击百度btn的时候触发,并跳到新的连接*/
var btn = document.querySelector("#btn");
cookies = []; 
btn.onclick = function(){
  /*获取当前input的值*/
  var otext = document.getElementById("text").value;
  /*将百度作为连接,传入input的值,并跳入新的页面*/
  if(otext=="" || otext==null){
    window.location.href = "http://127.0.0.1:8020/%E7%99%BE%E5%BA%A6/%E7%99%BE%E5%BA%A6%E9%A6%96%E9%A1%B5.html?__hbt=1516599867084";
  }else{
    window.location.href = "https://www.baidu.com/s?ie=utf-8&f=8&rsv_bp=1&rsv_idx=1&tn=baidu&wd="+otext
  }
}
/*加载页面input为空*/
function onloads(){
  var s = otext.value = null;
  $myId("text").focus();
}
function randomBack(){
  var randomBk = parseInt(Math.random()*545);
  document.body.style.background = "url(https://ss3.bdstatic.com/lPoZeXSm1A5BphGlnYG/skin/"+randomBk+".jpg?2)";
  document.body.style.backgroundSize = "100%";
}‘“

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The search function is implemented from Baidu’s https:// sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su?wd="+otext.value+"&cb=houxiaowei, in this link, the value of "wd" is the value to be searched in the input box, and it will return a json object. The value of &cb is a method or function, which is used to extract the value from json and put it into li.

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