CSS3媒体查询实现不同宽度的下不同内容的展示功能
<h3>前言</h3><h3>CSS3 多媒体查询实例</h3>
<p>本章节我们将为大家演示一些多媒体查询实例。</p>
<p>开始之前我们先制作一个电子邮箱的链接列表。HTML 代码如下：</p>
<div class="jb51code"><pre class="brush:xhtml;"><!DOCTYPE html>
<html>
<head>
<style>
ul {
list-style-type: none;
}
ul li a {
color: green;
text-decoration: none;
padding: 3px;
display: block;
}
</style>
</head>
<body>
<ul>
<li><a data-email="johndoe@example.com" href="mailto:johndoe@example.com">John Doe</a></li >
<li><a data-email="marymoe@example.com" href="mailto:marymoe@example.com">Mary Moe</a></li >
<li><a data-email="amandapanda@example.com" href="mailto:amandapanda@example.com">Amanda Panda</a>< /li>
</ul>
</body>
</html></pre></div>
<p><code>注意 data-email 属性。在 HTML 中我们可以使用带 data- 前缀的属性来存储信息。</code></p>
<h3>520 到 699px 宽度 - 添加邮箱图标</h3>
<p>当浏览器的宽度在 520 到 699px, 邮箱链接前添加邮件图标：</p>
<div class="jb51code"><pre class="brush:css;">@media screen and (max-width: 699px) and (min-width: 520px) {
ul li a {
padding-left: 30px;
background: url(email-icon.png) left center no-repeat;
}
}</pre></div>
<h3>700 到 1000px - 添加文本前缀信息</h3>
<p>当浏览器的宽度在 700 到 1000px, 会在邮箱链接前添加 "Email: ":</p>
<div class="jb51code"><pre class="brush:css;">@media screen and (max-width: 1000px) and (min-width: 700px) {
ul li a:before {
content: "Email: ";
font-style: italic;
color: #666666;
}
}</pre></div>
<h3>大于 1001px 宽度 - 添加邮件地址</h3>
<p>当浏览器的宽度大于 1001px 时，会在链接后添加邮件地址接。</p>
<p>我们会使用 data- 属性来为每个人名后添加邮件地址：</p>
<div class="jb51code"><pre class="brush:css;">@media screen and (min-width: 1001px) {
ul li a:after {
content: " (" attr(data-email) ")";
font-size: 12px;
font-style: italic;
color: #666666;
}
}</pre></div>
<h3>大于 1151px 宽度 - 添加图标</h3>
<p>当浏览器的宽度大于 1001px 时，会在人名前添加图标。</p>
<p>实例中，我们没有编写额外的查询块，我们可以在已有的查询媒体后使用逗号分隔来添加其他媒体查询 (类似 OR 操作符):</p>
<div class="jb51code"><pre class="brush:css;">@media screen and (max-width: 699px) and (min-width: 520px), (min-width: 1151px) {
ul li a {
padding-left: 30px;
background: url(email-icon.png) left center no-repeat;
}
}</pre></div>
<p>代码</p>
<div class="jb51code"><pre class="brush:xhtml;"><!DOCTYPE html>
<html>
<head>
<style>
ul {
list-style-type: none;
}
ul li a {
color: green;
text-decoration: none;
padding: 3px;
display: block;
}
@media screen and (max-width: 699px) and (min-width: 520px) {
ul li a {
padding-left: 30px;
background: url(email-icon.png) left center no-repeat;
}
}
@media screen and (max-width: 1000px) and (min-width: 700px) {
ul li a:before {
content: "Email: ";
font-style: italic;
color: #666666;
}
}
@media screen and (min-width: 1001px) {
ul li a:after {
content: " (" attr(data-email) ")";
font-size: 12px;
font-style: italic;
color: #666666;
}
}
@media screen and (max-width: 699px) and (min-width: 520px), (min-width: 1151px) {
ul li a {
padding-left: 30px;
background: url(email-icon.png) left center no-repeat;
}
}
</style>
</head>
<body>
<ul>
<li><a data-email="johndoe@example.com" href="mailto:johndoe@example.com">John Doe</a></li>3
<li><a data-email="marymoe@example.com" href="mailto:marymoe@example.com">Mary Moe</a></li>
<li><a data-email="amandapanda@example.com" href="mailto:amandapanda@example.com">Amanda Panda</a></li>
</ul>
</body>
</html></pre></div>
<h2>后言</h2>
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