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99 lines
1.9 KiB
99 lines
1.9 KiB
4 years ago
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# [postcss][postcss]-convert-values
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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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## Usage
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See the [PostCSS documentation](https://github.com/postcss/postcss#usage) for
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examples for your environment.
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## Contributors
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See [CONTRIBUTORS.md](https://github.com/cssnano/cssnano/blob/master/CONTRIBUTORS.md).
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## License
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MIT © [Ben Briggs](http://beneb.info)
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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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