73 lines
1.5 KiB
Markdown
73 lines
1.5 KiB
Markdown
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# reduce-css-calc [](https://travis-ci.org/MoOx/reduce-css-calc)
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> Reduce CSS calc() function to the maximum.
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Particularly useful for packages like [rework-calc](https://github.com/reworkcss/rework-calc) or [postcss-calc](https://github.com/postcss/postcss-calc).
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## Installation
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```console
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$ npm install reduce-css-calc
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```
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## Usage
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### `var reducedString = reduceCSSCalc(string, precision)`
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```javascript
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var reduceCSSCalc = require('reduce-css-calc')
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reduceCSSCalc("calc(1 + 1)")
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// 2
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reduceCSSCalc("calc((6 / 2) - (4 * 2) + 1)")
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// -4
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reduceCSSCalc("calc(1/3)")
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// 0.33333
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reduceCSSCalc("calc(1/3)", 10)
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// 0.3333333333
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reduceCSSCalc("calc(3rem * 2 - 1rem)")
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// 5rem
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reduceCSSCalc("calc(2 * 50%)")
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// 100%
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reduceCSSCalc("calc(120% * 50%)")
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// 60%
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reduceCSSCalc("a calc(1 + 1) b calc(1 - 1) c")
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// a 2 b 0 c
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reduceCSSCalc("calc(calc(calc(1rem * 0.75) * 1.5) - 1rem)")
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// 0.125rem
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reduceCSSCalc("calc(calc(calc(1rem * 0.75) * 1.5) - 1px)")
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// calc(1.125rem - 1px)
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reduceCSSCalc("-moz-calc(100px / 2)")
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// 50px
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reduceCSSCalc("-moz-calc(50% - 2em)")
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// -moz-calc(50% - 2em)
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```
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See [unit tests](test/index.js) for others examples.
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## Contributing
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Work on a branch, install dev-dependencies, respect coding style & run tests before submitting a bug fix or a feature.
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```console
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$ git clone https://github.com/MoOx/reduce-css-calc.git
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$ git checkout -b patch-1
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$ npm install
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$ npm test
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```
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## [Changelog](CHANGELOG.md)
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## [License](LICENSE-MIT)
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