@onaio/redux-reducer-registry

Redux Reducer Registry

The reducer registry enables Redux reducers to be added to the store’s reducer after the store has been created. This allows Redux modules to be loaded on-demand, without requiring all Redux modules to be bundled in the main chunk for the store to correctly initialize.

This package was inspired by this blog post: Redux modules and code splitting.

Installation

yarn add @onaio/redux-reducer-registry

How it works

By maintaining a registry of reducers, we are able to load any reducer dynamically as and when we need it.

The Store

A sample registry-aware redux store with no initial state is included in this package.

import store from '@onaio/redux-reducer-registry';

Alternatively, you can create your own store by doing something like:

import { getStore, combine } from '@onaio/redux-reducer-registry';
import reducerRegistry from '@onaio/redux-reducer-registry';

const initialState = {
  things: ['users', 'messages'],
  x: 1
};
const newStore = getStore(reducerRegistry.getReducers(), initialState);

// don't forget to do this so that you add a reducer to store when it is registered
reducerRegistry.setChangeListener(reducers => {
  newStore.replaceReducer(combine(reducers));
});

Registering Reducers

This is simply:

import reducerRegistry from 'redux-reducer-registry';
import reducer from 'some-module/reducers/users';

reducerRegistry.register('users', reducer);

After this the users reducer should now be fully loaded and ready to go.

Redux modules

We highly recommend and encourage that you use redux modules.