Super simple logging middleware for Redux

logger.js

import Conf from '../conf' // Various app-level options, including a logging flag.

const logger = store => next => action => {
  // Middleware format.
  // - Logs each action as they come in,
  // - Dispatches the action, and
  // - Logs the new state.
  if (Conf.logging && typeof console.group === 'function') {
    console.group(action.type)
    console.info('📲 dispatching', action)
    let result = next(action)
    console.log('💽 next state', store.getState())
    console.groupEnd(action.type)
    return result
  }

  return next(action)
}

export default logger