trycss_font-size_em 在线代码实例

实例代码( Tip: 登录后体验更佳 )
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>W3Cschool教程(w3cschool.cn)</title>
<style>
    h1 {font-size:2.5em;} /* 40px/16=2.5em */
    h2 {font-size:1.875em;} /* 30px/16=1.875em */
    p {font-size:0.875em;} /* 14px/16=0.875em */
</style>
</head>
<body>
    <h1>这是标题1</h1>
    <h2>这是标题2</h2>
    <p>这是一个段落。</p>
    <p>在em中指定字体大小允许所有主要浏览器调整文本大小。
    不幸的是，旧版本的IE仍然存在问题。当调整文本大小时，它会变得比应该的大/小。
    </p>
</body>
</html>
 
 
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运行结果
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