store.js

import {createReducer} from 'rxjs-store';

const TodoActions = {
  add: newItem => items => items.concat(newItem),
  remove: oldItem => items => items.filter(item => item !== oldItem);
};

const todos = createReducer(TodoActions, []);

// Pass these to a <Provider /> and you're done
const store = combineReducers({todos: todos.store});
const actions = {todos: todos.actions};