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JavaScript implements Baidu search box effect

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May 05, 2018 am 10:47 AM

javascriptjsEffect

This article mainly introduces the effect of JavaScript to realize Baidu search box in detail. It has certain reference value. Interested friends can refer to it.

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Effect:

　1. When entering the interface, the method is automatically called to obtain the current time and update the time in real time.

2. Click the skin change at the head of the page to automatically change the background image

3. When the mouse clicks on the search box, it will automatically display the content the user last searched for,

4 .When the mouse is placed on the content the user last searched for, the content of the search box changes to the content hovered by the mouse

　5. When pressing Enter in the search box, it is automatically entered into the last entered content. , if this content is the same as the last content, it will not be displayed

　6. Click the Baidu button to automatically enter the content in the search box as the last searched content

Interface:

Interface html code:

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>百度一下，你就知道</title>
 <link rel="shortcut icon" type="imges/x-icon" href="img/favicon.ico">　　<!-- 页面标题的图标 -->
 <link rel="stylesheet" type="text/css" href="css/index.css">
</head>
<body onload="dates()" id="bo">　　<!-- 当页面加载时调用函数 -->
 <p class="nav">
  <ul class="left">
   <li>时间：</li>
   <li id="sj"></li>
   <li>|</li>
   <li><a id="bg">换肤</a></li>
   <li><a>消息</a></li>
  </ul>
  <ul class="right">
   <li><a href="#">新闻</a></li>
   <li><a href="#">hao123</a></li>
   <li><a href="#">地图</a></li>
   <li><a href="#">视频</a></li>
   <li><a href="#">贴吧</a></li>
   <li><a href="#">学术</a></li>
   <li><a href="#">登陆</a></li>
   <li><a href="#">注册</a></li>
  </ul>
 </p>
 <img src="/static/imghwm/default1.png"  data-src="img/logo.png"  class="lazy"   alt="" id="logo">
 <p class="baidu_box">
  <input type="text" name="" value=" " id="seek">
  <img class="icon lazy"  src="/static/imghwm/default1.png"  data-src="img/xj.png"   alt="" >
  <p id="baidu">百度一下</p>
  <ul>
   <p>十九大后 习大大反腐不歇脚</p>
   <p>张一山杨紫互怼</p>
   <p>土耳其客机被吊起</p>
  </ul>
 </p>
 <ul class="buttom">
  <li><a href="#">把百度设为首页</a></li>
  <li><a href="#">关于百度</a></li>
  <li><a href="#">About Baidu</a></li>
  <li><a href="#">百度推广</a></li>
 </ul>
 <script type="text/javascript" src=&#39;js/index.js&#39;></script>
 <script>
  setInterval(&#39;dates()&#39;,1000)　　//定时器，每1秒调用下函数
 </script>
</body>
</html>

css code:

*{margin: 0;padding: 0;}
body,html{width: 100%;height: 636px;background: url(&#39;../img/bj2.jpg&#39;) no-repeat;background-size:100% 100% }
.nav{width: 100%;height: 32px;background:rgba(0,0,0,0.3);padding-right:20px;padding-left:20px;box-sizing: border-box }
.nav .left{list-style: none;float: left}
.nav .left li{color:white;line-height: 32px;margin-right: 12px;font-size: 13px;float: left;}
.nav .left li a{color:white;}
.nav .left li a:hover{cursor: pointer}
.nav .right{list-style: none;float: right;}
.nav .right li a{color:white;line-height: 32px;margin-left: 12px;font-size: 13px;opacity:1;}
.nav .right li{float: left;}
#logo{margin: 0px auto;display: block;}
.baidu_box{width: 646px;height: 44px;margin:0 auto;position: relative;margin-top: 20px; }
.baidu_box #seek{height: 40px;width: 538px;float: left;text-indent: 0.6em;font-size: 16px;}
.baidu_box #baidu{width: 104px;height: 44px;float: left;line-height: 44px;font-size:16px;text-align: center;background: url(&#39;../img/an_bg.jpg&#39;) no-repeat;background-size: 100% 100%;}
.baidu_box #baidu:hover{cursor: pointer}
.baidu_box .icon{position: absolute;top: 12px;left: 490px;}
.baidu_box .icon:hover{cursor: pointer}
.baidu_box ul{width: 541px;float: left;display: none;}
.baidu_box ul p{width: 542px;line-height: 40px;list-style: none;display: none;text-indent: 0.6em;background: white}
.baidu_box ul p:hover{cursor: pointer;background: url(&#39;../img/an_bg.jpg&#39;) no-repeat;background-size: 100% 100%;}
.buttom{margin: 0 auto;width: 500px;height: 40px;margin-top:210px;}
.buttom li {list-style: none;float: left;margin-left: 20px;}
.buttom li a {line-height: 40px;color: #525252;}

js code:

//百度搜索框
var baidu = document.getElementById(&#39;baidu&#39;); //获取百度按钮名字
var seekArray = new Array (); //创建新数组;用来存放用户上一次搜索的问题
var seek = document.getElementById(&#39;seek&#39;); //获取百度搜索框
var p = document.getElementsByTagName(&#39;p&#39;); //获取下拉标签
baidu.onclick = baiDu;//给百度按钮创建onclick事件
function baiDu(){
 var seeked = seek.value;  //获取用户在搜索框中搜索的内容
 if((seeked != seekArray[0]) && (seeked != seekArray[1])){ //判断数组内不能出现重复的值，若重复则不能添加到数组中
  seekArray.unshift(seeked);  //将用户添加的内容放入到新创建的内数组中
 }
 seekArray.length = 3;   //将数组的长度定死为3 ;即显示搜索框显示的内容就是为3
 for(var x=0;x<seekArray.length;x++){ //将数组中的东西放入到我们的搜索框下菜单中
  if((seekArray[x] != undefined)){  //判断用户上次搜索的东西，假如为空就不显示
   p[x].innerHTML = seekArray[x];
  }
 }
}

//搜索框获焦/失焦的状态
seek.onfocus = function(){
 for(var x of p){
  x.style.display = &#39;block&#39;;
 }
 p[0].parentNode.style.display = &#39;block&#39;; //
}
seek.onblur = function(){
 p[0].parentNode.style.display = &#39;none&#39;;
 for(var x of p){
  x.style.display = &#39;none&#39;;
 }
}
seek.onkeydown = function(Ent){
 // console.log(baiDu);
 if(Ent.keyCode == 13){  //当在input框中敲回车的时候
  baiDu();    //触发baiDu()
 }
}

//点击用户搜索过的新闻搜索框直接显示
for(var x of p){
 x.onmouseover = look ; //遍历所有的li并且给每个li添加鼠标悬浮事件
}
function look(){
 seek.value = this.innerHTML;
}

//获取当前时间
function dates(){
 var now = document.getElementById(&#39;sj&#39;);
 var time = new Date;
 var hour = time.getHours();
 var mins = time.getMinutes();
 if(parseInt(mins)<10){
  mins = &#39;0&#39;+mins;
 }
 now.innerHTML = hour +&#39;:&#39;+mins;
}

//点击换背景
var bg = document.getElementById(&#39;bg&#39;);//获取id为dg的标签
bg.onclick = function bgImg(){   //给他添加点击事件
 var bo = document.getElementById(&#39;bo&#39;);  //获取body
 var i = parseInt(Math.random()*7);   //写个随机数字
 bo.setAttribute("style","background:url(&#39;img/bj"+(i+1)+".jpg&#39;) no-repeat;background-size:100% 100%");//更改他的样式
}

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