reduce-redux/index.js

A helper library to reduce redux boilerplate and make developers life easier.

const isPlainObject = require('lodash.isplainobject')
require('es6-object-assign').polyfill();

exports.createReducer = function(initialState, actionsMap) {

  return function(prevState, action) {

    if (!prevState) {
      return initialState
    }

    if (!actionsMap.hasOwnProperty(action.type)) {
      return prevState
    }

    var result = actionsMap[action.type](action, prevState)

    if (isPlainObject(result) && isPlainObject(prevState)) {
      return Object.assign({}, prevState, result)
    }

    return result
  }
}