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How to implement the top navigation bar with CSS+HTML

醉折花枝作酒筹

Apr 30, 2021 am 09:14 AM

html Navigation Bar

This article will introduce to you how to implement the top navigation bar with CSS HTML. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

How to implement the top navigation bar with CSS+HTML

Implementation of navigation bar, fixed top navigation bar, and secondary menu implementation

Rendering:

How to implement the top navigation bar with CSS+HTML

When I was using this navigation bar recently, I found that when the page was zoomed in and out, the layout and display of the navigation bar had some minor problems, so I changed the css part of the code and reposted it

New code implementation (optimized layout):

<html>
   <head>
       <style type="text/css">
        .top{
    /* 设置宽度高度背景颜色 */
    height: auto; /*高度改为自动高度*/
    width:100%;
    margin-left: 0;
    background:rgb(189, 181, 181);
    position: fixed; /*固定在顶部*/
    top: 0;/*离顶部的距离为0*/
    margin-bottom: 5px;
}
.top ul{
    /* 清除ul标签的默认样式 */
    width: auto;/*宽度也改为自动*/
    list-style-type: none;
    white-space:nowrap;
    overflow: hidden;
    margin-left: 5%;
    /* margin-top: 0;          */
    padding: 0;

}
.top li {
    float:left; /* 使li内容横向浮动，即横向排列  */
    margin-right:2%;  /* 两个li之间的距离*/
    position: relative;
    overflow: hidden;
}

.top li a{
   /* 设置链接内容显示的格式*/
    display: block; /* 把链接显示为块元素可使整个链接区域可点击 */
    color:white;
    text-align: center;
    padding: 3px;
    overflow: hidden;
    text-decoration: none; /* 去除下划线 */
    
}
.top li a:hover{
    /* 鼠标选中时背景变为黑色 */
    background-color: #111;
}
.top ul li ul{
    /* 设置二级菜单 */
    margin-left: -0.2px;
    background:rgb(189, 181, 181);
    position: relative;
    display: none; /* 默认隐藏二级菜单的内容 */

}
.top ul li ul li{
    /* 二级菜单li内容的显示 */
    
    float:none;
    text-align: center;
}
.top ul li:hover ul{
    /* 鼠标选中二级菜单内容时 */
    display: block;
}
body{
    background:#eff3f5;
}

       </style>
        <body>
            <div class="top">
                   <center> 
                    <ul>
                    <li><a href="#">一级菜单</a></li>
                    <li><a href="#">一级菜单</a></li>
                    <li><a href="#">一级菜单</a></li>
                    <li><a href="#"><b>一级菜单</b></a></li>
                    <li><a href="#">一级菜单</a></li>
                    <li>
                        <a href="#">一级菜单</a>
                        <ul>
                            <li><a href="#">二级菜单</a></li>
                            <li><a href="#">二级菜单</a></li>
                        </ul>
                    </li>        
                      </ul>
                    </center>      
            </div>
        </body>
    </head>
</html>

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The original code implementation below (there is a problem with the navigation layout when the page is zoomed in or out):

<html>
   <head>
       <style type="text/css">
        .top{
            /* 设置宽度高度背景颜色 */
            height: 50px;
            width:100%;
            background:rgb(189, 181, 181);
            position: fixed; /*固定在顶部*/
            top: 0;/*离顶部的距离为0*/
        }
        .top ul{
            /* 清除ul标签的默认样式 */
            width: 80%;
            list-style-type: none;
            margin: 0;            
            padding: 0;
            overflow: hidden;

        }
        .top li {    
            float:left; /* 使li内容横向浮动，即横向排列  */
            margin-right:50px;  /* 两个li之间的距离*/
        }

        .top li a{
           /* 设置链接内容显示的格式*/
            display: block; /* 把链接显示为块元素可使整个链接区域可点击 */
            color:white;
            text-align: center;
            padding: 14px 16px;
            text-decoration: none; /* 去除下划线 */
        }
        .top li a:hover{
            /* 鼠标选中时背景变为黑色 */
            background-color: #111;
        }
        .top ul li ul{
            /* 设置二级菜单 */
            width: auto;
            background:rgb(189, 181, 181);
            position: absolute;
            display: none; /* 默认隐藏二级菜单的内容 */

        }
        .top ul li ul li{
            /* 二级菜单li内容的显示 */
            margin-right:0;
            float:none;
            text-align: center;
        }
        .top ul li:hover ul{
            /* 鼠标选中二级菜单内容时 */
            display: block;
        }
       </style>
        <body>
            <div class="top">
                   <center> 
                    <ul>
                    <li><a href="#">一级菜单</a></li>
                    <li><a href="#">一级菜单</a></li>
                    <li><a href="#">一集菜单</a></li>
                    <li><a href="#"><b>一级菜单</b></a></li>
                    <li><a href="#">一级菜单</a></li>
                    <li>
                        <a href="#">一级菜单</a>
                        <ul>
                            <li><a href="#">二级菜单</a></li>
                            <li><a href="#">二级菜单</a></li>
                        </ul>
                    </li>        
                      </ul>
                    </center>      
            </div>
        </body>
    </head>
</html>

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