zoukankan      html  css  js  c++  java
  • day15 CSS JS DOM初探

    居中  line-hight  是上下
             text-line  是左右
     
     实现一个返回顶部的功能:
    1 先写好CSS

    2 写动作JS

    写一个悬浮菜单:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
        <style>
            .pg-header{
                margin: 0 auto;
                height: 48px;
                980px;
                background-color: aquamarine;
                color: coral;
                position: fixed;
                top: 0;
                left: 20px;
                right: 20px;
                line-height: 48px;
                text-align: center;
            }
            .pg-body{
                margin: 0 auto;
                background-color: #dddddd;
                980px;
                height: 5000px;
                margin-top: 50px;
            }
        </style>
    </head>
    <body>
        <div class="pg-header">此处为菜单</div>
        <div class="pg-body">此处为内容</div>
    </body>
    </html>
    

    效果:

    上下滚动菜单始终固定在顶部

    实现一个点赞按钮的效果:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
        <div style="position: relative; 500px;height: 200px;border: 1px solid red; margin: 0 auto;">
            <div style="position: absolute;left: 0;bottom: 0; 50px;height: 50px;background-color: aquamarine"></div>
        </div>
        <div style="position: relative; 500px;height: 200px;border: 1px solid red; margin: 0 auto;">
            <div style="position: absolute;right: 0;top: 0; 50px;height: 50px;background-color: aquamarine"></div>
        </div>
    </body>
    </html>
    

      

    效果:

     实现一个遮罩层,就是平时的弹出选择框,即模态框:

    加透明度:
    opacity  设置遮罩层的透明度  0-1 的范围
    三层  
    设置一个值,谁的大谁在上面:
    z-index

     

    实践:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
        <div style="background-color: white;
        /*display: none;*/
        z-index: 10;
        position: fixed;
        height: 400px;
         500px;
        top: 50%;
        left: 50%;
        margin-left: -250px;
        margin-top: -200px;
        border: 1px brown;
        ">
            <div style="display: inline">姓名</div><input type="text"/>
            <div style="display: inline">密码</div><input type="text"/>
        </div>
        <div style="background-color: blue;
        /*display: none;*/
        position: fixed;
        z-index: 9;
        top:0;
        bottom: 0;
        left: 0;
        right: 0;
        opacity: 0.5;"></div>
        
        <div style="height: 5000px;background-color: coral;"> hehhehhehe</div>
    </body>
    </html>
    

      

    效果:

    图片的问题:
    overflow
    可以设置隐藏或者自动生成滚动条

     

    设置上右下左的间隔:

    伪类:

    鼠标移到后应用:
    当鼠标移到当前标签上时,就会使得下面的css生效
    hover

     

    实践:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
        <style>
            .pg-header{
                position: fixed; /* 设置为固定位置*/
                right: 0;           /*距离右边0*/
                left: 0;          /*距离左边0*/
                top: 0;           /*距离上边0*/
                height: 48px;      /*高度为48像素*/
                background-color: #2459a2;   /*背景颜色*/
                line-height: 48px;        /*设置上下居中,和高度一样才能居中*/
            }
            .pg-body{
                margin-top: 50px;  /*设置距离顶部50像素,避免menu挡住body*/
            }
            .w{
                 980px;   /*全局宽度 980像素*/
                margin: 0 auto;  /*自动居中*/
            }
            .pg-header .menu{
                display: inline-block;  /*设置标签为行内块级混合标签,可以设置高度和宽度*/
                padding: 0 10px 0 10px; /*设置标签上下左右的距离*/
                color: white; /*字体颜色*/
            }
            .pg-header .menu:hover{  /*此属性是当鼠标移动到此时应用*/
                background-color: dodgerblue;  /*背景颜色*/
            }
        </style>
    </head>
    <body>
        <div class="pg-header">
            <div class="w">
                <a class="logo">LOGO</a>
                <a class="menu">段子</a>
                <a class="menu">1024</a>
                <a class="menu">42区</a>
            </div>
        </div>
        <div class="pg-body">
            <div class="w">ddddd</div>
        </div>
    </body>
    </html>
    

     

    渐变色 就是一个非常细的图片一直自动堆叠

    高度增加 也是自动堆叠
    控制图片怎么堆叠,使用下面的

     

    其实图标都是只用一个图,然后通过调整

    就能显示一个图片不同的位置

    实践:

    <body>
        <div style="height: 100px;"></div>
        <div style="height: 20px;20px;background-image: url(icon_18_118.png);border: 1px solid red"></div>
    </body>
    

    显示不同位置: 

    <body>
        <div style="height: 100px;"></div>
        <div style="height: 20px;
        20px;
        background-image: url(icon_18_118.png);
        background-position-x: 0px;
        background-position-y: -58px;
        border: 1px solid red"></div>
    </body>
    

    相对的位置,如点赞的图案:

     

    有个问题,图片会挡住输入,修改后就好了

    实践:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
        <div class="user-input" style="padding: 5px;">
            <div style="display: inline-block; 100px;text-align: right;">账号:</div>
            <div style="display: inline-block; 300px;height:30px;position: relative;">
                <input type="text" style="height: 30px;
                 270px;
                padding-right: 30px"></input>
                <span style="position:absolute;
                right: 6px;
                top:10px;
                background-image: url(user.jpg);
                height: 16px;
                 16px;
                display: inline-block"></span>
            </div>
        </div>
        <div class="passwd-input" style="padding: 5px;">
            <div style="display: inline-block; 100px;text-align: right;">这是密码:</div>
            <div style="display: inline-block; 300px;height:30px;position: relative;">
                <input type="text" style="height: 30px;
                 270px;
                padding-right: 30px"></input>
                <span style="position:absolute;
                right: 6px;
                top:10px;
                background-image: url(i_pwd.jpg);
                height: 16px;
                 16px;
                display: inline-block"></span>
            </div>
        </div>
    </body>
    </html>
    

     
    开始 javascript

    一门独立的语言
    和java没半毛钱关系
     

     helloworld

     

     写代码的位置,两种形式:

    1在html 文件中:

     2 单独文件,引入到html文件中:

    先执行js  从上往下读运行
     
    js没有完成之前 网页就一直等待js完成,这样对用户就不友好
     
    解决办法就是把js放在html尾部
    写在body 内部的最下面:

     

    写的时候先写 var
    斟酌以后确实是全局,再去掉var

     

     

    定义函数:

     

    在控制台打印日志:
    console.log(1)


    根据id找到内容:

    获取内容:

     

     
    获取子列表:

    拼接字符串:

     

    做一个滚动条效果:

     

    实践:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
        <script>
            function func() {
                var tag = document.getElementById('i1');
                var content = tag.innerText;
                var f = content.charAt(0);
                var l = content.substring(1,content.length)
                var new_content = l + f;
                tag.innerText = new_content;
            }
            setInterval('func()',500);
        </script>
    </head>
    <body>
        <div id="i1">欢迎老男孩莅临指导&nbsp</div>
    </body>
    </html>
    

    效果:

     

     

    join 添加分隔符

     

     循环:

     

     

    DOM
    做了一个动作就是把文档转换为一个对象

     

    改变数据:
    document.getElementById('i1').innerText = 'new数据'
     

     
     

    实现模态框:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
        <style>
            .hide{
                display: none;
            }
            .c1{
                position: fixed;
                left: 0;
                right: 0;
                top: 0;
                bottom: 0;
                background-color: black;
                opacity: 0.6;
                z-index: 9;
            }
            .c2{
                 500px;
                height: 400px;
                background-color: white;
                position: fixed;
                left: 50%;
                right: 50%;
                top: 50%;
                margin-left: -250px;
                margin-top: -100px;
                z-index: 10;
            }
        </style>
    </head>
    <body>
        <div>
            <input type="button" value="添加" onclick="ShowModel();"/>
        </div>
        <!--遮罩层 -->
        <div id="i1" class="c1 hide"></div>
        <!-- 弹出窗-->
        <div id="i2" class="c2 hide">
            <p>
                <input type="text"/>
                <input type="text"/>
            </p>
            <p>
                <input type="button" value="取消" onclick="HideModel();"/>
                <input type="button" value="确定" onclick="HideModel();"/>
            </p>
        </div>
        <script>
            function ShowModel() {
                document.getElementById('i1').classList.remove('hide')
                document.getElementById('i2').classList.remove('hide')
            }
            function HideModel() {
                document.getElementById('i1').classList.add('hide')
                document.getElementById('i2').classList.add('hide')
            }
        </script>
    </body>
    </html>
    

    效果:

     
    实现一个全选和取消的功能:
     

    分号必须要加,因为线上的时候会把js文件成为一行,必须用分好来断句, 生成一行就是为了节约空间,有专门的压缩工具

    实现一个后台管理的简单页面,需要点击菜单显示菜单,可以全选,反选,可以点击有模态框效果:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>管理</title>
        <style>
            .pg-header{
                margin: 0 auto;
                height: 48px;
                /*980px;*/
                background-color: #2459a2;
                color: coral;
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                line-height: 48px;
                z-index: 10;
            }
            .pg-header .logo{
                display: inline-block;
                margin-left: 50px;
            }
            .pg-body{
                margin-top: 50px;
                1080px;
                height: 2000px;
            }
            .pg-body .menu{
                text-align: center;
                200px;
                border: 1px solid red;
                padding: 10px;
                background-color: aquamarine;
                float: left;
                margin: 5px;
            }
            .pg-body .menu .every-menu{
                text-align: center;
                display: inline-block;
                border: 1px solid red;
                 180px;
                height: 50px;
                margin: 5px;
                padding: 2px;
                line-height: 50px;
            }
            .pg-body .info{
                float: left;
                margin: 5px;
                border: 1px solid red;
                 800px;
                height: 500px;
            }
            .pg-body .info .info-menu{
                margin: 10px;
            }
            .pg-body .info-body{
                margin: 5px;
                /* 650px;*/
                height: 400px;
                border: 1px solid red;
                text-align: center;
            }
            .go-header{
                position: fixed;
                bottom:20px;
                right:20px;
                 80px;
                height: 80px;
                background-color: coral;
                color: white;
                z-index: 11;
                cursor: pointer;
            }
            .hide{
                display: none;
            }
            .c1{
                position: fixed;
                left: 0;
                right: 0;
                top: 0;
                bottom: 0;
                background-color: black;
                opacity: 0.6;
                z-index: 9;
            }
            .c2{
                 500px;
                height: 400px;
                background-color: white;
                position: fixed;
                left: 50%;
                right: 50%;
                top: 50%;
                margin-left: -250px;
                margin-top: -100px;
                z-index: 10;
            }
            .hide-menu{
                display: none;
            }
            .item .header{
                height: 35px;
                background-color: #2459a2;
                color: white;
                line-height: 35px;
            }
    
        </style>
    </head>
    <body>
        <div class="pg-header">
            <a class="logo">LOGO</a>
        </div>
    
        <div class="go-header" onclick="GoTop();">
            <img src="back_top.png" alt="美女" title="返回顶部">
        </div>
    
        <!--遮罩层 -->
        <div id="i1" class="c1 hide"></div>
        <!-- 弹出窗-->
        <div id="i2" class="c2 hide">
            <p>
                <div style="margin: 5px;">
                    <div style="display: inline-block; 60px;text-align: right">IP:</div>
                    <input type="text"/>
                </div>
                <div style="margin: 5px;">
                    <div style="display: inline-block; 60px;text-align: right">主机:</div>
                    <input type="text"/>
                </div>
            </p>
            <p>
                <div style="display: inline-block; 200px;text-align: center">
                    <input type="button" value="取消" onclick="HideModel();"/>
                    <input type="button" value="确定" onclick="HideModel();"/>
                </div>
            </p>
        </div>
    
    
        <div class="pg-body">
            <div class="menu">
                <div class="item">
                    <div id='m1' class="header" onclick="ChangeMenu('m1');">菜单1</div>
                    <div class="content hide-menu">
                        <div>内容1</div>
                        <div>内容1</div>
                        <div>内容1</div>
                    </div>
                </div>
                <div class="item">
                    <div id='m2' class="header" onclick="ChangeMenu('m2');">菜单2</div>
                    <div class="content hide-menu">
                        <div>内容2</div>
                        <div>内容2</div>
                        <div>内容2</div>
                    </div>
                </div>
                <div class="item">
                    <div id='m3' class="header" onclick="ChangeMenu('m3');">菜单3</div>
                    <div class="content hide-menu">
                        <div>内容3</div>
                        <div>内容3</div>
                        <div>内容3</div>
                    </div>
                </div>
                <div class="item">
                    <div id='m4' class="header" onclick="ChangeMenu('m4');">菜单4</div>
                    <div class="content hide-menu">
                        <div>内容4</div>
                        <div>内容4</div>
                        <div>内容4</div>
                    </div>
                </div>
            </div>
    
    
            <div class="info">
                <div class="info-menu">
                    <input type="button" value="全选" onclick="CheckAll();"> </input>
                    <input type="button" value="取消" onclick="CancleAll();"> </input>
                    <input type="button" value="反选" onclick="ReCheckAll();"> </input>
                    <input type="button" value="添加" onclick="ShowModel();"> </input>
                </div>
                <div class="info-body">
                    <div>
                        <table>
                            <thead>
                                <tr>
                                    <td>选择</td>
                                    <td>主机</td>
                                    <td>IP</td>
                                    <td>备注</td>
                                </tr>
                            </thead>
                            <tbody  id="tb">
                                <tr>
                                    <td><input type="checkbox"/></td>
                                    <td>web101</td>
                                    <td>192.168.8.5</td>
                                    <td></td>
                                </tr>
                                <tr>
                                    <td><input type="checkbox"/></td>
                                    <td>web102</td>
                                    <td>192.168.8.6</td>
                                    <td></td>
                                </tr>
                                <tr>
                                    <td><input type="checkbox"/></td>
                                    <td>web103</td>
                                    <td>192.168.8.7</td>
                                    <td></td>
                                </tr>
                                <tr>
                                    <td><input type="checkbox"/></td>
                                    <td>web104</td>
                                    <td>192.168.8.8</td>
                                    <td></td>
                                </tr>
                                <tr>
                                    <td><input type="checkbox"/></td>
                                    <td>web105</td>
                                    <td>192.168.8.9</td>
                                    <td></td>
                                </tr>
                            </tbody>
                        </table>
                    </div>
                </div>
            </div>
            <div style="clear: both;"></div>
        </div>
    <script>
        function CheckAll() {
            var tbody = document.getElementById('tb');
            var tr_list = tbody.children;
            for (var i = 0; i < tr_list.length; i++) {
                var curren_tr = tr_list[i];
                var checkbox = curren_tr.children[0].children[0];
                checkbox.checked = true;
            }
        }
    
        function CancleAll() {
            var tbody = document.getElementById('tb');
            var tr_list = tbody.children;
            for (var i = 0; i < tr_list.length; i++) {
                var curren_tr = tr_list[i];
                var checkbox = curren_tr.children[0].children[0];
                checkbox.checked = false;
            }
        }
    
        function ReCheckAll() {
            var tbody = document.getElementById('tb');
            var tr_list = tbody.children;
            for (var i = 0; i < tr_list.length; i++) {
                var curren_tr = tr_list[i];
                var checkbox = curren_tr.children[0].children[0];
                if (checkbox.checked) {
                    checkbox.checked = false;
                }else{
                    checkbox.checked = true;
                }
            }
        }
    
        function GoTop() {
            document.body.scrollTop = 0;
        }
    
        function ShowModel() {
            document.getElementById('i1').classList.remove('hide')
            document.getElementById('i2').classList.remove('hide')
        }
    
        function HideModel() {
            document.getElementById('i1').classList.add('hide')
            document.getElementById('i2').classList.add('hide')
        }
    
        function ChangeMenu(nid){
                var current_header = document.getElementById(nid);
                var item_list = current_header.parentElement.parentElement.children;
                for(var i=0;i<item_list.length;i++){
                    var current_item = item_list[i];
                    current_item.children[1].classList.add('hide-menu');
                }
                current_header.nextElementSibling.classList.remove('hide-menu');
        }
    </script>
    </body>
    </html>
    

    效果:

     
     
     
     
     
     
  • 相关阅读:
    springEL单引号默认值
    vscode支持c99标准
    Error loading class 'solr.HMMChineseTokenizerFactory'
    spring security通过UserDetailsService方式当找不到用户时兼容i18n方法
    springboot普通类中获取i18对应的值
    docker-compose安装后执行报错
    springboot日志
    mysql登录报错:mysql: error while loading shared libraries: libncurses.so.5: cannot open shared object file: No such file or directory
    springboot统一ajax返回数据格式,并且jquery ajax success函数修改
    spring security jquery ajax重定向问题解决
  • 原文地址:https://www.cnblogs.com/yangever/p/6093988.html
Copyright © 2011-2022 走看看