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doc: update docs/css.md

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jaywcjlove
2023-03-04 10:25:48 +08:00
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@ -1811,6 +1811,20 @@ div:has(h2):has(ul) {
} }
``` ```
### 获取 HTML 元素的属性
```html
<a href="https://example.com">超链接</a>
```
attr HTML 元素的属性名。
```css
a:after {
content: " (" attr(href) ")";
}
```
另见 另见
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