JS 实现百度搜索功能
今天我们来用JS实现百度搜索功能,下面上代码:
HTML部分:
<!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()"> <div class="box"> <div class="box_log"> <div class="box_log_img"> <img src="img/superlogo_c4d7df0a003d3db9b65e9ef0fe6da1ec.png"/> </div> </div> <div class="box_text"> <div 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> </div> </div> </div> <script type="text/javascript" src="js/index.js" ></script> </body> </html>
CSS层叠样式部分:
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; }
JS部分:
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%"; }‘“
搜索功能的实现源于百度的 https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su?wd="+otext.value+"&cb=houxiaowei,这个链接,其中”wd”的值为input框中需要搜索的值,它会返回一个json对象。&cb的值是一个方法或者是函数,它用来将json中的值提取出来放入li中。
总结
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