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+# reduce-css-calc
+
+[![Build Status](https://travis-ci.org/MoOx/reduce-css-calc.svg)](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](src/__tests__/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)