This preprocessor is written in PHP, so as prerequisite you will need to have PHP installed on your system to use the JS api. ```shell npm install csscrush ``` All methods can take the standard options (camelCase) as the second argument. ```php const csscrush = require('csscrush'); // Compile. Returns promise. csscrush.file('./styles.css', {sourceMap: true}); // Compile string of CSS. Returns promise. csscrush.string('* {box-sizing: border-box;}'); // Compile and watch file. Returns event emitter (triggers 'data' on compile). csscrush.watch('./styles.css'); ```