:first-child
Baseline
Widely available
*
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015年7月.
{"* "}Some parts of this feature may have varying levels of support.
尝试一下
语法
示例
基础示例
HTML
CSS
结果
样式化列表
HTML
html
<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>
Item 3
<ul>
<li>Item 3.1</li>
<li>Item 3.2</li>
<li>Item 3.3</li>
</ul>
</li>
</ul>
CSS
css
ul li {
color: blue;
}
ul li:first-child {
color: red;
font-weight: bold;
}
结果
规范
| Specification |
|---|
| Selectors Level 4 # first-child-pseudo |