Features module concept

features.js

// Having some sort of feature flags allows us to
// - write centralized logic around when to show features
// - develop features in smaller pieces behind feature flags
// - turn on/off features at will

// In a view, effect, whereever 
import features from '../features'

if (features('showFooBar')) {
  // display FooBar
}

// In features.development.js
const developmentFeatures = {
  showFooBar: true,
  showBamWhack: false,
}
export developmentFeatures;

// in features.production.js is slightly different
// we dont want to showFooBar yet in prod
const productionFeatures = {
  showFooBar: false,
  showBamWhack: false,
}
export productionFeatures;

// so why is features.showFooBar a function?
// it allows us to set up experiments or other logic
const productionFeatures = {
  // TODO: find a way to pass state in
  showFooBar: (state) => return state.settings.showFooBar || true,
  showBamWhack: () => return inBamWhackExperiment() || false,
}

// The module itself is pretty simple
let featureHash;
if (env.NODE_ENV === 'production') {
  featureHash = require('featues.production.js');
} else {
  featureHash = require('featues.development.js');
}

const features = function features(key){
  if (!featureHash[key]) return console.error(`Feature '${key}' does not exist.`);
  if (typeof featureHash[key] === 'function') return featureHash[key]();
  return featureHash[key];
};

export default features;