Pattern Engine Extender for Pattern Lab Node

The Pattern Engine Extender allows Pattern Lab Node users to extend the pattern engine.

Installation

To add the plugin to your project using npm type:

npm install plugin-node-engine-extender --save

Or add it directly to your project's package.json file and run npm install

Configuration

The plugin expects a config file to be available to import from a path specified in the patternlab config like this:

config

 {
   "extensionPath": "ROOT_PATH/to/your/extensions.js",
 }

extensions.js

const helpers = {
  join: function (arr, seperator = ',') {
    if (arr && arr.length > 0) {
      return arr.join(seperator)
    }
  }
}

// Takes a Pattern Engine as an argument, modifies, and returns it.
const applyHelpers = (engine) => {
  for (let key in helpers) {
    if (helpers[key]) {
      engine.registerHelper(key, helpers[key])
    }
  }
  return engine
}

module.exports = applyHelpers