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2018-5-5 学习进度

2018-5-5 学习进度

作者: lyw_4c52 | 来源:发表于2018-05-05 23:57 被阅读0次

    一、了解jQuery

    jQuery是一个js函数库,可以看作它实现的就是js,但从代码上看更简单了。
    1.html 的元素选取
    一个格式上的$(" ") 认识了选择器,相当与原生js中通过document.getElement......来获取的功能
    对html元素的操作也是类似的

    2.常用jQuery事件
    $(document).ready()
    $("p").dblclick(function(){ $(this).hide();});

    3.认清jQuery对象与DOM对象的差异
    通过jQuery包装后的对象是一个类数组对象
    jQuery是一个类数组对象,而DOM对象就是一个单独的DOM元素。

    4.索引的注意:
    jQuery实现:nth-child(n)从1开始计数,:nth-child(index)从1开始的,而eq(index)是从0开始的
    nth-child(n) 与 :nth-last-child(n) 的区别前者是从前往后计算,后者从后往前计算

    额。。还没有写demo

    二、完善自己以前写的小例子

    1.百度首页

    <!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="images/x-icon" href="http://www.baidu.com/favicon.ico">
        <style>
            .top {
                width:100%;
                height:40px;
            }
    
            .top>.title {
                height:40px;
                float:right;
            }
    
            .top>.title>span
            {
                line-height:40px;
                float:right;
            }
    
            .top>.title>span>a {
                font-size:13px;
    
                text-decoration:underline;
                color:#333;
            }
    
            .setWide {
                font-weight:bold;
            }
    
            .product-list {
                display: inline;
                margin:0;
            }
    
            .more-product {
                border:0;
                height:25px;
                width:65px;
                font-size: 14px;
                background: rgba(51, 102, 255, 0.82);
                color:#fff;
                text-align: center;
            }
    
            .list {
                position: fixed;
                top: 0;
                bottom: 0;
                right: 0;
                width: 90px;
                background-color: #f9f9f9;
                color: #000;
                text-align: center;
                border-left: 1px solid #e7e7e7;
                transform: translate3d(100px,0,0);
                padding-top: 50px;
            }
    
            .list span {
                border-top: rgba(191, 191, 191, 0.44) solid 1px ;
                text-align: center;
                display: block;
                padding: 10px
            }
    
            .product-list:hover .more-product {
                background: transparent;
                color: #333;
            }
    
            .product-list:hover .list {
                transform: translate3d(0,0,0);
                z-index: -1;
            }
    
            .list span a {
                font-size: 14px;
                text-decoration: none;
            }
    
            .pic{
                text-align:center;
            }
    
            .logo{
                height:130px;
            }
    
            .foot {
                text-align: center;
            }
    
            .foot>a {
                width:100%;
                text-align: center;
                font-size:12px;
                color:darkgray;
                margin-bottom: 10px;
                text-decoration: underline;
            }
    
            .foot>.Line {
                text-decoration: underline;
            }
    
            .bottom {
                color:#767376;
                padding-top: 0;
                width:100%;
                text-align: center;
                font-size:12px;
            }
    
            .bottom>p {
                margin:0;
                line-height: 40px;
                color:#767376;
            }
    
            .bottom>p>a {
                text-decoration: underline;
                color: #767376;
            }
    
            .icp,
            .gongan {
                width: 14px;
                height: 17px;
                display: inline-block;
                overflow: hidden;
                background: url(https://ss1.bdstatic.com/5eN1bjq8AAUYm2zgoY3K/r/www/cache/static/protocol/https/global/img/icons_5859e57.png) no-repeat;
            }
    
            .icp {
                background-position: -600px -96px;
                position: relative;
                top: 3px;
            }
            .gongan {
                background-position: -623px -96px;
                position: relative;
                top: 3px;
            }
    
            #search-text {
                width: 540px;
                height: 36px;
                box-sizing: border-box;
                margin-left: 355px;
                margin-top: 3px;
                text-indent: 4px;
            }
    
            #search-button {
                width: 100px;
                height: 36px;
                background: #3385FF;
                border: 0;
                letter-spacing: 1px;
                color: white;
                margin-left: -5px;
                font-size: 15px;
                box-sizing: border-box;
                transform: translateY(2px);
                -webkit-box-sizing: border-box;
            }
    
            #search-button:hover {
                cursor: pointer;
            }
    
            #suggest {
                width: 540px;
                margin: 0;
                padding: 0;
                margin-left: 355px;
                list-style: none;
                display: none;
                border: 1px solid #E3E5E4;
            }
    
            #suggest li {
                line-height: 36px;
                background: white;
            }
    
            #suggest li:hover {
                background: #F0F0F0;
            }
    
            .li1 {
                text-indent: 4px;
            }
    
        </style>
    
    </head>
    <body>
    
    <div class="top">
        <div class="title">
            <span>
                <a class="setWide" href="http://news.baidu.com/">新闻</a>&nbsp;&nbsp;&nbsp;
                <a class="setWide" href="https://www.hao123.com/">hao123</a>&nbsp;&nbsp;&nbsp;
                <a class="setWide" href="https://map.baidu.com/">地图</a>&nbsp;&nbsp;&nbsp;
                <a class="setWide" href="http://v.baidu.com/">视频</a>&nbsp;&nbsp;&nbsp;
                <a class="setWide" href="https://tieba.baidu.com/index.html">贴吧</a>&nbsp;&nbsp;&nbsp;
                <a class="setWide" href="http://xueshu.baidu.com/">学术</a>&nbsp;&nbsp;&nbsp;
                <a href="https://passport.baidu.com">登录</a>&nbsp;&nbsp;&nbsp;
                <a class="setting"><a href="#">设置</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                </a>
                <div class="product-list">
                    <input class="more-product" type="submit" value="更多产品" name="submit" />
                    <div class="list">
                        <span>
                    <img src="#" style="width:30px;height:30px;" alt="" ><br><a href="https://www.nuomi.com/?cid=002540">糯米</a>
                </span>
                <span>
                    <img src="#" style="width:30px;height:30px;" alt="" ><br><a href="http://music.baidu.com/">音乐</a>
                </span>
                <span>
                    <img src="#" style="width:30px;height:30px;" alt="" ><br><a href="https://zhidao.baidu.com/">知道</a>
                </span>
                <span>
                    <img src="#" style="width:30px;height:30px;" alt="" ><br><a href="https://wenku.baidu.com/">文库</a>
                </span>
                <span>
                    <img src="#" style="width:30px;height:30px;" alt="" ><br><a href="http://top.baidu.com/">风云榜</a>
                </span>
                <span>
                    <a href="http://top.baidu.com/" style="font-size: 12px;">全部产品>></a>
                </span>
                    </div>
                </div>
            </span>
        </div>
    </div>
    
    <div class="pic">
        <img class="logo" src="http://www.baidu.com/img/bd_logo1.png" title="点击一下,了解更多"/>
    </div>
    <br/>
    <div class="main-search">
        <form>
            <input id="search-text" type="text" name="search" value="" />
            <input id="search-button" type="button" name="submit" value="百度一下" />
            <ul id="suggest">
                <li class="li1" onclick="show_it(this.id)"></li>
                <li class="li1" onclick="show_it(this.id)"></li>
                <li class="li1" onclick="show_it(this.id)"></li>
                <li class="li1" onclick="show_it(this.id)"></li>
                <li class="li1" onclick="show_it(this.id)"></li>
                <li class="li1" onclick="show_it(this.id)"></li>
                <li class="li1" onclick="show_it(this.id)"></li>
                <li class="li1" onclick="show_it(this.id)"></li>
                <li class="li1" onclick="show_it(this.id)"></li>
                <li class="li1" onclick="show_it(this.id)"></li>
            </ul>
        </form>
    </div>
    <br><br><br><br><br><br><br><br>
    <div class="c-img" style="text-align: center;">
        <img src="https://ss1.bdstatic.com/5eN1bjq8AAUYm2zgoY3K/r/www/cache/static/protocol/https/home/img/qrcode/zbios_efde696.png" ><br>
        <span style="font-size: 12px;font-weight: bold;color:dimgrey" >百度</span>
    </div>
    <br>
    <div class="foot">
        <a href="https://www.baidu.com/cache/sethelp/help.html" >把百度设为主页</a>&nbsp;&nbsp;&nbsp;&nbsp;
        <a href="http://home.baidu.com/">关于百度</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        <a class="Line" href="http://ir.baidu.com">About Baidu</a>&nbsp;&nbsp;&nbsp;
        <a href="http://e.baidu.com/?refer=888">百度推广</a>
    </div>
    <div class="bottom">
        <p>
            ©2018 Baidu <a href="http://www.baidu.com/duty/" style="margin: 0 3px">使用百度前必读</a>
            <a href="http://jianyi.baidu.com/" style="margin: 0 3px">意见反馈</a> 京ICP证030173号
            <i class="icp"></i>
            <a href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=11000002000001">京公网安备11000002000001号</a>
            <i class="gongan"></i>
        </p>
    </div>
    <script>
        var oText = document.getElementById("search-text");
        oSug = document.querySelector("#suggest");
        lis = document.getElementsByClassName("li1");
    
        // 当在input框中键盘弹起触发
        oText.onkeyup = function(){
            oSug.style.display = oText.value?"block":"none";
            var osc = document.createElement("script");
            // 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,同时也完成页面跳转完成搜索的核心
            osc.src = "https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su?wd="+oText.value+"&cb=record";
    
            document.body.appendChild(osc);
    
            //按下回车跳转页面
            if(event.keyCode===13){
                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 = oSug.children;
        function record(json){
            var jsonLength = 0;
            for(var x in json.s){
                jsonLength++;
            }
            for(var i=0;i<lis.length;i++){
                if(jsonLength===0){
                    arr[i].innerHTML = null;
                }else{
                    if(json.s[i]!=null){
                        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 show_it(e){
            oText.value = arr[e].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;
        }
        //单击body中的任意地方可以隐藏li
        document.body.onclick = function(){
            oSug.style.display = "none";
        };
    
        //单击百度btn的时候触发,并跳到新的连接
        var button = document.querySelector("#search-button");
        button.onclick = function(){
            var oText = document.getElementById("search-text").value;
            window.location.href = "https://www.baidu.com/s?ie=utf-8&f=8&rsv_bp=1&rsv_idx=1&tn=baidu&wd="+oText;
        }
    </script>
    </body>
    </html>
    

    2.文字查找替换
    (上个学期的新生作业里的)

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>文字查找替换</title>
        <style>
            #box {
                border: 1px solid grey;
                width: 600px;
                margin: 0 auto;
            }
            .means {
                display: inline-block;
            }
            span {
                background: #ffa185;
            }
        </style>
    </head>
    <body>
    <div id="box">
        <div class="means">
            <form>
            查找:<input type="text" />
            替换:<input type="text" />
                <input type="button" value="查找" />
                <input type="button" value="替换" />
            </form>
        </div>
            <br>
        <div>
            <p>生活是人间在繁华的演出,沉睡是所有故事的收尾、谁不是生命的漫游者?
                谁没在云端闲情过?
                生命,只是一场唯有一次的真实梦境。
                新的阳光里,香樟哭了,那些忧伤化作清晨的雾被蒸干了。
                因为有阳光的揩拭,香樟才敢放肆泪珠,那么,我的眼泪呢?
            </p>
        </div>
    </div>
    <script>
        window.onload = function () {
            var oInput = document.getElementsByTagName("input");
            var p = document.getElementsByTagName("p")[0];
            var str = p.innerHTML;
    
            oInput[2].onclick = function () {
                var finder = oInput[0].value;
                if (str.indexOf(finder)===-1) {
                    alert ("没有找到!")
                }
                else {
                    var show = str.split(finder).join("<span>" + finder + "</span>");
                    //显示结果
                    p.innerHTML = show;
                }
            }
    
            oInput[3].onclick = function () {
                var finder = oInput[0].value;
                var change = oInput[1].value;
                var show = str.split(finder).join("<span>"+change+"</span>");
                //显示结果
                p.innerHTML = show;
            }
        }
    </script>
    </body>
    </html>
    

    这之前的尝试的实例中领略了CSS对页面布局样式的作用,在这个例子中则认识到JS在功能上的实现,类似的还有选项卡的切换功能......

    3.文字搬运
    (这个还差一点,快了。。)

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