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