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2026-03-30 01:04:46 +08:00
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+# [postcss][postcss]-unique-selectors
+
+> Ensure CSS selectors are unique.
+
+## Install
+
+With [npm](https://npmjs.org/package/postcss-unique-selectors) do:
+
+```
+npm install postcss-unique-selectors --save
+```
+
+## Example
+
+Selectors are sorted naturally, and deduplicated:
+
+### Input
+
+```css
+h1,h3,h2,h1 {
+    color: red
+}
+```
+
+### Output
+
+```css
+h1,h2,h3 {
+    color: red
+}
+```
+
+## Usage
+
+See the [PostCSS documentation](https://github.com/postcss/postcss#usage) for
+examples for your environment.
+
+## Contributors
+
+See [CONTRIBUTORS.md](https://github.com/cssnano/cssnano/blob/master/CONTRIBUTORS.md).
+
+## License
+
+MIT © [Ben Briggs](http://beneb.info)
+
+[postcss]: https://github.com/postcss/postcss