CSS 的作用:first-child 选择器
使用 CSS:first-child 选择器可以对作为父元素首个子级元素的每个 <p> 标记设置样式。
示例
可以尝试运行以下代码来实现:first-child 选择器
<!DOCTYPE html>
<html>
<head>
<style>
p:first-child {
background-color: orange;
}
</style>
</head>
<body>
<h1>Heading</h1>
<p>This is demo text.</p>
<div>
<p>This is demo text, with the first child of its parent div.</p>
<p>This is demo text, but not the first child.</p>
</div>
</body>
</html>
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