CSS 中 :first-child 伪类的用法
使用 :first-child 伪类向作为其他元素的第一个子元素的元素添加特殊样式。
示例
您可以尝试运行以下代码来了解 :first-child 伪类的用法 -
<html> <head> <style> div > p:first-child { text-indent: 25px; } </style> </head> <body> <div> <p>First paragraph in div. This paragraph will be indented</p> <p>Second paragraph in div. This paragraph will not be indented</p><p><span>立即学习</span>“<a href="https://pan.quark.cn/s/cb6835dc7db1" style="text-decoration: underline !important; color: blue; font-weight: bolder;" rel="nofollow" target="_blank">前端免费学习笔记(深入)</a>”;</p> </div> <p>But it will not match the paragraph in this HTML:</p> <div> <h3>Heading</h3> <p>The first paragraph inside the div. This paragraph will not be effected.</p> </div> </body></html>