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| 1 | # [postcss][postcss]-unique-selectors
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| 2 |
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| 3 | > Ensure CSS selectors are unique.
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| 4 |
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| 5 | ## Install
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| 6 |
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| 7 | With [npm](https://npmjs.org/package/postcss-unique-selectors) do:
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| 8 |
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| 9 | ```
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| 10 | npm install postcss-unique-selectors --save
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| 11 | ```
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| 12 |
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| 13 | ## Example
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| 14 |
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| 15 | Selectors are sorted naturally, and deduplicated:
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| 16 |
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| 17 | ### Input
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| 18 |
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| 19 | ```css
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| 20 | h1,h3,h2,h1 {
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| 21 | color: red
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| 22 | }
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| 23 | ```
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| 24 |
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| 25 | ### Output
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| 26 |
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| 27 | ```css
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| 28 | h1,h2,h3 {
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| 29 | color: red
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| 30 | }
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| 31 | ```
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| 32 |
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| 33 | ## Usage
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| 34 |
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| 35 | See the [PostCSS documentation](https://github.com/postcss/postcss#usage) for
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| 36 | examples for your environment.
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| 37 |
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| 38 | ## Contributors
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| 39 |
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| 40 | See [CONTRIBUTORS.md](https://github.com/cssnano/cssnano/blob/master/CONTRIBUTORS.md).
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| 41 |
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| 42 | ## License
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| 43 |
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| 44 | MIT © [Ben Briggs](http://beneb.info)
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| 45 |
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| 46 | [postcss]: https://github.com/postcss/postcss
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