使用栅格系统开发响应式页面——logo+nav实例

小屏时：

 

 中屏及以上时：

 

 

 

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>4-4编程练习（2）</title>
        <link rel="stylesheet" href="css/grid.css" />
        <style>
            *{
                margin: 0;
                padding: 0;
                box-sizing: border-box;
            }
            li{
                list-style: none;
            }
            a{
                text-decoration: none;
            }
            
            .nav-item{
                line-height: 70px;
                margin-left: 20px;
                cursor: pointer;
            }
            .nav-item:hover{
                color: red;
            }
            .nav-content{
                display: flex;
            }
            .container{
                height: 70px;
                width: 100%;
                border-bottom: 1px solid #dadada;
            }
            .btn-wrap{
                width: 70px;
                height: 70px;
                border-radius: 0 100% 0 0;
                background: red;
            }
            .btn-line{
                width: 30px;
                height: 4px;
                border-radius: 2px;
                display: block;
                background: #fff;
                position: relative;
                top: 20px;
                margin: 10px 0;
            }
            
            .row,
            .logo-wrap,
            .head-logo,
            img{
                height: 100%;
            }
            img{
                vertical-align: top;
                border: none;
            }
            .nav-dropdown{
                overflow: hidden;
                background: #e5e5e5;
                height: 0;
                transition: all 0.5s;
            }
            .nav-dropdown-item{
                line-height: 40px;
                display: block;
                border-bottom: 1px solid #b0b0b0;
                text-indent: 20px;
                color: #666;
                font-size: 15px;
            }
            .no-line{
                border: none;
            }
            .nav-dropdown-item:hover{
                color: red;
            }
            .nav-dropdown-item-active{
                height: 122px;
            }
        </style>
    </head>
    <body>
        <div class="container">
            <div class="row">
                <div class="btn-wrap col-2 d-md-none" id="btn">
                    <span class="btn-line"></span>
                    <span class="btn-line"></span>
                </div>
                <div class="nav-wrap col-md-5 d-none d-md-block ">
                    <ul class="nav-content">
                        <li class="nav-item">首页</li>
                        <li class="nav-item">关于</li>
                        <li class="nav-item">商业合作</li>
                    </ul>
                </div>
                <div class="logo-wrap col-7 col-offset-3 col-md-offset-0 col-md-7">
                    <a href="#" class="head-logo">
                        <img src="img/logo.png" />
                    </a>
                </div>
            </div>
            
        </div>
        <div class="nav">
            <ul class="nav-dropdown" id="nav">
                <li><a href="#" class="nav-dropdown-item">首页</a></li>
                <li><a href="#" class="nav-dropdown-item">关于</a></li>
                <li><a href="#" class="nav-dropdown-item no-line">商业合作</a></li>
            </ul>
        </div>
        
        <script>
            btn.onclick = function(){
                if(nav.classList.contains('nav-dropdown-item-active')){
                    nav.classList.remove('nav-dropdown-item-active');
                }else{
                    nav.classList.add('nav-dropdown-item-active');
                }
            }
            
            
        </script>
    </body>
</html>

 

posted @ 2019-09-18 21:39  是桂  阅读(253)  评论(0)  编辑  收藏  举报