107 lines
5.3 KiB
Markdown
107 lines
5.3 KiB
Markdown
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# [postcss][postcss]-convert-values [][ci] [][npm] [][deps]
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> Convert values with PostCSS (e.g. ms -> s)
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## Install
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With [npm](https://npmjs.org/package/postcss-convert-values) do:
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```
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npm install postcss-convert-values --save
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```
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## Example
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This plugin reduces CSS size by converting values to use different units
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where possible; for example, `500ms` can be represented as `.5s`. You can
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read more about these units in [this article][csstricks].
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### Input
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```css
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h1 {
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font-size: 16px;
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width: 0em
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}
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```
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### Output
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```css
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h1 {
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font-size: 1pc;
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width: 0
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}
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```
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Note that this plugin only covers conversions for duration and absolute length
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values. For color conversions, use [postcss-colormin][colormin].
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## API
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### convertValues([options])
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#### options
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##### length
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Type: `boolean`
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Default: `true`
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Pass `false` to disable conversion from `px` to other absolute length units,
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such as `pc` & `pt` & vice versa.
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##### time
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Type: `boolean`
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Default: `true`
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Pass `false` to disable conversion from `ms` to `s` & vice versa.
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##### angle
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Type: `boolean`
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Default: `true`
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Pass `false` to disable conversion from `deg` to `turn` & vice versa.
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##### precision
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Type: `boolean|number`
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Default: `false`
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Specify any numeric value here to round `px` values to that many decimal places;
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for example, using `{precision: 2}` will round `6.66667px` to `6.67px`, and
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`{precision: 0}` will round it to `7px`. Passing `false` (the default) will
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leave these values as is.
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It is recommended for most use cases to set this option to `2`.
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## Contributors
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Thanks goes to these wonderful people ([emoji key](https://github.com/kentcdodds/all-contributors#emoji-key)):
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<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
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| [<img src="https://avatars.githubusercontent.com/u/1282980?v=3" width="100px;"/><br /><sub>Ben Briggs</sub>](http://beneb.info)<br />[💻](https://github.com/ben-eb/postcss-convert-values/commits?author=ben-eb) [📖](https://github.com/ben-eb/postcss-convert-values/commits?author=ben-eb) 👀 [⚠️](https://github.com/ben-eb/postcss-convert-values/commits?author=ben-eb) | [<img src="https://avatars.githubusercontent.com/u/5635476?v=3" width="100px;"/><br /><sub>Bogdan Chadkin</sub>](https://github.com/TrySound)<br />[💻](https://github.com/ben-eb/postcss-convert-values/commits?author=TrySound) [📖](https://github.com/ben-eb/postcss-convert-values/commits?author=TrySound) 👀 [⚠️](https://github.com/ben-eb/postcss-convert-values/commits?author=TrySound) | [<img src="https://avatars.githubusercontent.com/u/177485?v=3" width="100px;"/><br /><sub>Roman Komarov</sub>](http://kizu.ru/en/)<br />[🐛](https://github.com/ben-eb/postcss-convert-values/issues?q=author%3Akizu) | [<img src="https://avatars.githubusercontent.com/u/5103477?v=3" width="100px;"/><br /><sub>Dmitry Kiselyov</sub>](http://codepen.io/dmitrykiselyov)<br />[🐛](https://github.com/ben-eb/postcss-convert-values/issues?q=author%3Admitrykiselyov) | [<img src="https://avatars.githubusercontent.com/u/5038030?v=3" width="100px;"/><br /><sub>Charlike Mike Reagent</sub>](http://www.tunnckocore.tk)<br />[💻](https://github.com/ben-eb/postcss-convert-values/commits?author=tunnckoCore) [⚠️](https://github.com/ben-eb/postcss-convert-values/commits?author=tunnckoCore) | [<img src="https://avatars.githubusercontent.com/u/815848?v=3" width="100px;"/><br /><sub>Vyacheslav Shebanov</sub>](https://github.com/Termina1)<br />[📖](https://github.com/ben-eb/postcss-convert-values/commits?author=Termina1) | [<img src="https://avatars.githubusercontent.com/u/192323?v=3" width="100px;"/><br /><sub>Marek ‘saji’ Augustynowicz</sub>](http://twitter.com/saji_)<br />[💻](https://github.com/ben-eb/postcss-convert-values/commits?author=marek-saji) [⚠️](https://github.com/ben-eb/postcss-convert-values/commits?author=marek-saji) |
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| :---: | :---: | :---: | :---: | :---: | :---: | :---: |
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| [<img src="https://avatars.githubusercontent.com/u/552316?v=3" width="100px;"/><br /><sub>Jonny Gerig Meyer</sub>](www.oddbird.net)<br />[💻](https://github.com/ben-eb/postcss-convert-values/commits?author=jgerigmeyer) [⚠️](https://github.com/ben-eb/postcss-convert-values/commits?author=jgerigmeyer) | [<img src="https://avatars.githubusercontent.com/u/1726061?v=3" width="100px;"/><br /><sub>GU Yiling</sub>](http://lync.in/)<br />[💻](https://github.com/ben-eb/postcss-convert-values/commits?author=Justineo) [⚠️](https://github.com/ben-eb/postcss-convert-values/commits?author=Justineo) |
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<!-- ALL-CONTRIBUTORS-LIST:END -->
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This project follows the [all-contributors] specification. Contributions of
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any kind welcome!
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## License
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MIT © [Ben Briggs](http://beneb.info)
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[all-contributors]: https://github.com/kentcdodds/all-contributors
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[ci]: https://travis-ci.org/ben-eb/postcss-convert-values
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[colormin]: https://github.com/ben-eb/postcss-colormin
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[deps]: https://gemnasium.com/ben-eb/postcss-convert-values
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[npm]: http://badge.fury.io/js/postcss-convert-values
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[postcss]: https://github.com/postcss/postcss
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[csstricks]: https://css-tricks.com/the-lengths-of-css/
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