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@supports.htm
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<!DOCTYPE html>
<html lang="zh-cmn-Hans">
<head>
<meta charset="utf-8" />
<title>@supports</title>
<meta name="Description" content="CSS3参考手册之: @supports" />
<meta name="Keywords" content="@supports, 条件规则" />
<meta name="author" content="Joy Du(飘零雾雨), dooyoe@gmail.com, www.doyoe.com" />
<meta name="robots" content="all" />
<!--[if lte IE 8]>
<script src="../js/html5.js"></script>
<![endif]-->
<link rel="stylesheet" href="../skin/article.css" />
</head>
<body>
<nav id="guide" class="g-mod">
<div class="from">
<a href="http://css.doyoe.com/" target="_blank">CSS3参考手册</a>
<span>»</span>
<a href="../index.htm" id="category" rel="rules" name="@supports">语法与规则列表</a>
<span>»</span>
</div>
<div class="to">
<span class="label">相关内容：</span>
<div class="g-combobox g-transition">
<a href="?" class="g-transition target">
<strong>其它语法与规则参考</strong>
<span>选择其它项<!--[if lte IE 7]><ins>IE7 and earlier, Get to die</ins><![endif]--></span>
</a>
<div class="g-transition list">
<ul>
<!-- 插入快速分类导航 -->
</ul>
</div>
</div>
</div>
</nav>
<header id="hd">
<section id="title" class="g-mod">
<h1 class="tit">@supports</h1>
<ul class="info">
<li><strong>版本：CSS3</strong></li>
<li>2015.9.6</li>
</ul>
<!-- 插入浏览器信息 -->
</section>
</header>
<section id="bd">
<section id="syntax" class="g-mod g-attr">
<h2 class="tit">语法：</h2>
<div class="cont">
<p><strong>@supports</strong> (rule)[<a href="#operator">operator</a> (rule)]* { sRules }</p>
<p id="operator"><strong>operator</strong>：or | and | not</p>
</div>
</section>
<section id="value" class="g-mod g-attr">
<h2 class="tit">取值：</h2>
<div class="cont">
<dl>
<dt>rule：</dt>
<dd>指定一条具体的CSS规则，必须使用括号包裹</dd>
<dt><a href="#operator">operator</a>：</dt>
<dd>使用<code class="g-code">or | and | not</code>等操作符指定多条规则。</dd>
</dl>
</div>
</section>
<section id="intro" class="g-mod g-attr">
<h2 class="tit">说明：</h2>
<div class="cont">
<strong>检测是否支持某CSS特性</strong>
<ul>
<li>
<strong>定义支持和不支持flex标准写法的浏览器分别使用不同的规则：</strong>
<div class="gquote">
<p class="gquote-tit"><strong>示例代码：</strong></p>
<blockquote class="gquote-cont"><code><xmp>@supports ( display: flex ) {
body {
display: flex;
}
#aside {
width: 210px;
}
#main {
flex: auto;
}
}
@supports not ( display: flex ) {
#aside {
float: left;
width: 210px;
}
#main {
overflow: hidden;
*zoom: 1;
}
}</xmp></code></blockquote>
<p class="gquote-info">我们可以通过类似这样的写法来给不同的终端使用差异化的方案。</p>
</div>
</li>
<li>
<strong>你也可以写多重规则来进行过滤：</strong>
<div class="gquote">
<p class="gquote-tit"><strong>示例代码：</strong></p>
<blockquote class="gquote-cont"><code><xmp>@supports ( box-shadow: 2px 2px ) or
( -moz-box-shadow: 2px 2px ) or
( -webkit-box-shadow: 2px 2px ) {
.demo {
-moz-box-shadow: 2px 2px 0 rgba(0, 0, 0, .3);
-webkit-box-shadow: 2px 2px 0 rgba(0, 0, 0, .3);
box-shadow: 2px 2px 0 rgba(0, 0, 0, .3);
}
}</xmp></code></blockquote>
</div>
</li>
</ul>
</div>
</section>
<section id="compatible" class="g-mod g-attr">
<h2 class="tit">兼容性：</h2>
<div class="cont">
<ul class="support-type">
<li><span class="support">浅绿</span> = 支持</li>
<li><span class="unsupport">红色</span> = 不支持</li>
<li><span class="partsupport">粉色</span> = 部分支持</li>
</ul>
<table class="g-data">
<thead>
<tr>
<th>IE</th>
<th>Firefox</th>
<th>Chrome</th>
<th>Safari</th>
<th>Opera</th>
<th>iOS Safari</th>
<th>Android Browser</th>
<th>Android Chrome</th>
</tr>
</thead>
<tbody>
<tr>
<td class="unsupport">6.0-11.0</td>
<td class="unsupport">2.0-21.0</td>
<td class="unsupport">4.0-27.0</td>
<td class="unsupport">6.0-8.0</td>
<td class="support" rowspan="2">15.0+</td>
<td class="unsupport">6.0-8.4</td>
<td class="unsupport">2.1-4.3</td>
<td class="unsupport">18.0-26.0</td>
</tr>
<tr>
<td class="support">12.0+</td>
<td class="support">22.0+</td>
<td class="support">28.0+</td>
<td class="support">9.0+</td>
<td class="support">9.0+</td>
<td class="support">4.4+</td>
<td class="support">27.0+</td>
</tr>
</tbody>
</table>
</div>
</section>
<section id="example" class="g-mod g-attr">
<h2 class="tit">示例：</h2>
<div class="cont">
<textarea cols="90" rows="10">
<!DOCTYPE html>
<html lang="zh-cmn-Hans">
<head>
<meta charset="utf-8" />
<title>@supports_CSS参考手册_web前端开发参考手册系列</title>
<meta name="author" content="Joy Du(飘零雾雨), dooyoe@gmail.com, www.doyoe.com" />
<style>
@supports ( display: flex ) {
body {
display: flex;
}
#aside {
width: 210px;
}
#main {
flex: auto;
}
}
@supports not ( display: flex ) {
#aside {
float: left;
width: 210px;
}
#main {
overflow: hidden;
*zoom: 1;
}
}
</style>
</head>
<body>
<div id="aside">aside</div>
<div id="main">main</div>
</body>
</html>
</textarea>
<p><input type="button" value="运行" class="g-btn g-btn-sure" /></p>
</div>
</section>
</section>
<footer id="ft">
<aside id="rights" class="g-mod">
<!-- 插入浏览器及版权信息 -->
</aside>
</footer>
<script src="../js/jquery.js"></script>
<script src="../js/inner.js"></script>
</body>
</html>