reducerdiffpatch.js

import { create as createJsondiffpatch } from 'jsondiffpatch'
import clone from 'clone'

const jsondiffpatch = createJsondiffpatch({})

function reducer(state = {}, action) {
  switch (action.type) {
    case 'INITIAL_STATE':
      const initialState = action.payload
      return initialState
    case 'PATCH':
      const diff = action.diff
      return jsondiffpatch.patch(clone(state), diff)
  }
}