Introduction to the implementation method of creating three-dimensional navigation bar with CSS-CSS Tutorial-php.cn

Introduction to the implementation method of creating three-dimensional navigation bar with CSS

黄舟

Release： 2017-10-17 10:29:33

Original

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This article mainly introduces the relevant information about using CSS to make a three-dimensional navigation bar. Friends in need can refer to the three-dimensional navigation bar made by

css. The specific implementation code is as follows:

<!doctype html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>CSS制作立体导航</title>
        <link rel="stylesheet" href="http://www.w3cplus.com/demo/css3/base.css">
        <style>
            body{
              background: #ebebeb;
            }
            .nav{
              width:560px;
              height: 50px;
              font:bold 0/50px Arial;
              text-align:center;
              margin:40px auto 0;
              background: #f65f57;
             /*制作导航圆角*/
              border-radius: 8px;
             /*制作导航立体效果*/
              box-shadow: 0 7px 0 #ba4a45;
            }
            .nav a{
              display: inline-block;
              /* a元素的过渡属性：1、设置所有a标签过渡；2、过渡时间；3、速度曲线：以慢速开始的过渡效果 */
                -webkit-transition: all 0.2s ease-in;/* Safari 和 Chrome */
                -moz-transition: all 0.2s ease-in;/* Firefox */
               -o-transition: all 0.2s ease-in;/* Opera */
               -ms-transition: all 0.2s ease-in;/* IE 9 */
               transition: all 0.2s ease-in;
            }
            .nav a:hover{
                /* 鼠标移上时的效果；定义2D旋转10度 */
              -webkit-transform:rotate(10deg);
              -moz-transform:rotate(10deg);
              -o-transform:rotate(10deg);
              -ms-transform:rotate(10deg);
              transform:rotate(10deg);
            }
            .nav li{
              position:relative;
              display:inline-block;
              padding:0 16px;
              font-size: 14px;
              text-shadow:1px 2px 4px rgba(0,0,0,.5);
              list-style: none outside none;
            }
            /*制作导航分隔线效果*/
            .nav li::before,
            .nav li::after{
              content:"";
              position:absolute;
              top:14px;
              height: 25px;
              width: 1px;
            }
            .nav li::after{
              right: 0;
              /* 线性渐变 */
              background: -moz-linear-gradient(top, rgba(255,255,255,0), rgba(255,255,255,.2) 50%, rgba(255,255,255,0));
              background: -webkit-linear-gradient(top, rgba(255,255,255,0), rgba(255,255,255,.2) 50%, rgba(255,255,255,0));
              background: -o-linear-gradient(top, rgba(255,255,255,0), rgba(255,255,255,.2) 50%, rgba(255,255,255,0));
              background: -ms-linear-gradient(top, rgba(255,255,255,0), rgba(255,255,255,.2) 50%, rgba(255,255,255,0));
              background: linear-gradient(top, rgba(255,255,255,0), rgba(255,255,255,.2) 50%, rgba(255,255,255,0));
            }
            .nav li::before{
              left: 0;
              background: -moz-linear-gradient(top, #ff625a, #9e3e3a 50%, #ff625a);
              background: -webkit-linear-gradient(top, #ff625a, #9e3e3a 50%, #ff625a);
              background: -o-linear-gradient(top, #ff625a, #9e3e3a 50%, #ff625a);
              background: -ms-linear-gradient(top, #ff625a, #9e3e3a 50%, #ff625a);
              background: linear-gradient(top, #ff625a, #9e3e3a 50%, #ff625a);
            }
            /*删除导航第一个导航项左边的分隔线*/
            .nav li:first-child::before{
              background: none;
            }
            /*删除导航最后一个导航右边的分隔线*/
            .nav li:last-child::after{
              background: none;
            }
            .nav a,
            .nav a:hover{
              color:#fff;
              text-decoration: none;
            }
        </style>
    </head>
    <body>
        <ul class="nav">
        <li><a href="">首页</a></li>
        <li><a href="">个人简介</a></li>
        <li><a href="">作品集</a></li>
        <li><a href="">博客</a></li>
        <li><a href="">资源</a></li>
        <li><a href="">联系我</a></li>
        </ul>
    </body>
</html>

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Rendering:

## Summary:

1. Use an unordered list for the body part

2. (1)hover

　The effect when the mouse is moved up.

　(2) Question: The difference between::before and :before

　 Simply put, a single colon (:) is used for CSS3 pseudo-classes, and a double colon (::) is used for CSS3 pseudo-elements.

　　w3c specification on css selectors:

A pseudo-element is made of two colons (::) followed by the name of the pseudo-element.

This :: notation is introduced by the current document in order to establish a discrimination between pseudo-classes and pseudo-elements. For compatibility with existing style sheets, user agents must also accept the previous one-colon notation for pseudo-elements introduced in CSS levels 1 and 2 (namely, :first-line, :first-letter, :before and :after). This compatibility is not allowed for the new pseudo-elements introduced in CSS level 3. Composed of colon and pseudo-element name. The double colon was introduced in the current specification to distinguish pseudo-classes from pseudo-elements. However, the browser needs to support the old existing pseudo-element writing methods at the same time, such as: first-line, :first-letter, :before, :after, etc., while the new pseudo-elements introduced in CSS3 are no longer allowed to support the old ones. Single colon writing.

Now you can fully answer the question in the title. For the pseudo-elements that existed before CSS2, such as :before, the single colon and the double colon::before have the same effect.

Therefore, if your website only needs to be compatible with webkit, firefox, opera and other browsers, it is recommended to use double colon writing method for pseudo elements. If it has to be compatible with IE browser, it is better to use CSS2 single colon writing method. Safety.

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