CSS 数据类型 <relative-size>表示相对大小的关键字。它定义了相对于父元素的计算大小的大小。
这些术语经常在 font-size 属性和 font shorthand 中使用。
<relative-size>关键字相对于当前元素大小。如果使用 <absolute-size> 关键字给出继承的大小<relative-size> 对应于 <absolute-size> 表中的相邻大小。
<relative-size>数据类型使用下面列出的值：
<relative-size> = smaller | larger以下示例演示了 <relative-size> 的不同值的使用及其比较：
<html>
<head>
<style>
.container {
font-size: 20px;
color: #333;
font-family: 'Arial', sans-serif;
}
.small {
font-size: smaller;
font-style: italic;
}
.large {
font-size: larger;
font-weight: bold;
}
.x-large {
font-size: x-large;
color: #0066cc;
}
.xx-large {
font-size: xx-large;
text-decoration: underline;
}
</style>
</head>
<body>
<div class="container">
<p>This is the custom default font size with different styles and colors.</p>
<p class="small">This text is slightly smaller and in italic.</p>
<p class="large">This text is slightly larger and bold.</p>
<p class="x-large">This text is extra large with a blue color.</p>
<p class="xx-large">This text is double extra large with underline.</p>
</div>
</body>
</html>以下示例演示了 <relative-size> 的不同值的使用及其比较：
<html>
<head>
<style>
body {
font-family: 'Arial', sans-serif;
font-size: 16px;
}
.container {
margin: 20px;
}
.smaller {
font-size: smaller;
}
.larger {
font-size: larger;
}
.custom-relative {
font-size: 120%;
}
</style>
</head>
<body>
<div class="container">
<p>This is the default font size.</p>
<p class="smaller">This text is smaller relative to the default.</p>
<p class="larger">This text is larger relative to the default.</p>
<p class="custom-relative">This text has a custom relative size (120%).</p>
</div>
</body>
</html>
