Simplified action type creator with constant validation

create-actions.js

import camelCase from 'lodash/camelCase'

export default function createActions(actionTypes, actionTypeConstants) {
  const actions = {}
  for (const actionType of actionTypes) {
    if (actionTypeConstants && !actionTypeConstants[actionType]) {
      throw new Error(`Tried creating invalid action type: ${actionType}`)
    }
    const key = camelCase(actionType)
    actions[key] = (payload) => ({
      type: actionType,
      payload
    })
  }
  return actions
}