在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
<style>.intro
{
background-color:yellow;
}
</style>
</head>

<body>
<h1>Welcome to My Homepage</h1>

<div class="intro">
<p>My name is Donald.</p>
<p>I live in Duckburg.</p>
</div>

<p>My best friend is Mickey.</p>

</body>
</html>

源代码

动行结果