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本文介绍了HTML5的details标签在创建折叠菜单中的应用。details标签用于展示文档细节,通过CSS样式和open属性可以制作折叠菜单。示例代码展示了如何实现一个菜单,其中包含子菜单,并在Chrome、Safari 8+和Opera 26+浏览器中有效。
details是HTML5新增的一个有趣又没用的标签,因为它兼容性实在有点差,按照百度来的说法,details只兼容Chrome, Safari 8+ ,Opera 26+
details标签用于描述文档或文档某个部分的细节,更容易理解的一种用法:折叠菜单
例子:
<details class="menu" open> <summary>菜单</summary> <ul> <li><a href="#">子菜单</a></li> <li><a href="#">子菜单</a></li> </ul> </details>
open定义details是否可见,说白了就是加上就默认展开,不加就是默认关闭。
可以用css定义相关样式
.menu summary { height: 40px; line-height: 40px; text-indent: 10px; outline: none; font-weight: 700; border-top: 1px solid #ddd; background: -webkit-gradient(linear, left top, left bottom, color-stop(0, #FEFEFE), color-stop(1, #CCCCCC)); cursor: pointer; } .menu ul { padding: 10px 0; margin: 0; } .menu ul li { list-style: none; text-indent: 25px; height: 30px; line-height: 30px; } .menu ul li a { display: block; color: #666; text-decoration: none; }
完整代码:
<!doctype html> <html> <head> <meta charset="utf-8"> <title>无标题文档</title> <style> * { margin: 0; padding: 0; } a { text-decoration: none; } #conter { width: 1000px; margin: auto; } #help-left { width: 200px; font-family: 'microsoft YaHei'; float: left; } .menu { border-left: 1px solid #ccc; border-right: 1px solid #ccc; } .menu:last-child { border-bottom: 1px solid #ccc; } .menu summary { height: 40px; line-height: 40px; text-indent: 10px; outline: none; font-size: 14px; font-weight: 700; border-top: 1px solid #ddd; background: -webkit-gradient(linear, left top, left bottom, color-stop(0, #FEFEFE), color-stop(1, #CCCCCC)); cursor: pointer; } .menu summary::-webkit-details-marker { display: none; } /*可用图片或字符,如果使用图片,把content的值设置为空*/ .menu summary:before { content: "+"; /*background: url(../Images/right.png) no-repeat center center;*/ /*收起时的图片*/ display: inline-block; width: 16px; height: 16px; margin-right: 10px; font-size: 18px; font-weight: 700; } .menu[open] summary:before { content: "-"; /*background: url(../Images/down.png) no-repeat center center;*/ /*展开时的图片*/ } .menu ul { padding: 10px 0; } .menu ul li { list-style: none; text-indent: 25px; font-size: 12px; height: 30px; line-height: 30px; } .menu ul li a { display: block; color: #666; } .menu ul li a:hover { text-decoration: underline; } </style> </head> <body> <section id="conter"> <section id="help-left"> <details class="menu" open> <summary>菜单1</summary> <ul> <li><a href="#">子菜单</a></li> <li><a href="#">子菜单</a></li> </ul> </details> <details class="menu" open> <summary>菜单2</summary> <ul> <li><a href="#">子菜单</a></li> <li><a href="#">子菜单</a></li> </ul> </details> <details class="menu" open> <summary>菜单3</summary> <ul> <li><a href="#">子菜单</a></li> <li><a href="#">子菜单</a></li> <li><a href="#">子菜单</a></li> </ul> </details> <details class="menu" open> <summary>菜单4</summary> <ul> <li><a href="#">子菜单</a></li> <li><a href="#">子菜单</a></li> <li><a href="#">子菜单</a></li> </ul> </details> </section> </section> </body> </html>
不考虑兼容性的情况下还是挺好用的,毕竟现在的浏览器只有Chrome和其他~~