Redux Flipper

Redux middleware for Flipper. It can log redux actions and show inside Flipper using flipper-plugin-redux-debugger.

Support

• React Native
  • For react-native >= 0.62, flipper support is enabled by default
  • For react-native < 0.62, follow these steps to setup your app
• Redux or Redux-Toolkit

Get Started

1. Install redux-flipper middleware and react-native-flipper in your React Native app:

1yarn add redux-flipper react-native-flipper
2# for iOS
3cd ios && pod install

2. Add the middleware into your redux store:

1import { createStore, applyMiddleware } from 'redux';
2
3const middlewares = [
4  /* other middlewares */
5];
6
7if (__DEV__) {
8  const createDebugger = require('redux-flipper').default;
9  middlewares.push(createDebugger());
10}
11
12const store = createStore(RootReducer, applyMiddleware(...middlewares));

Redux Toolkit

1const middlewares = [
2  /* other middlewares */
3];
4
5if (__DEV__) {
6  const createDebugger = require('redux-flipper').default;
7  middlewares.push(createDebugger());
8}
9
10const store = configureStore({
11  reducer: {},
12  middleware: (getDefaultMiddleware) => getDefaultMiddleware().concat(middleware),
13});

3. Install flipper-plugin-redux-debugger in Flipper desktop client:

Manage Plugins > Install Plugins > search "redux-debugger" > Install

4. Start your app, then you should be able to see Redux Debugger on your Flipper app

Optional Configuration

State whitelisting

Many times you are only interested in certain part of the Redux state when debugging. You can pass array of string which have to match to the root key of the Redux state.

For example if Redux schema is something like this and you are only interested in user then you can whitelist only that part of the state

1type ReduxState = {
2  todos: string[];
3  notifications: string[];
4  user: {
5    name: string;
6  };
7};

1let reduxDebugger = createDebugger({ stateWhitelist: ['user'] });

If you app has very big state tree it is also good idea to whitelist certain keys from Redux state otherwise Flipper can be very slow.

Resolve cyclic reference

Redux Debugger does not support cyclic reference objects by default as resolving it makes application slow. This feature can be enabled by passing { resolveCyclic: true } into createDebugger.

This is just a temporary solution if debugging is urgent. It is advisable to restructure your redux state structure.

For more information about cyclic reference, visit MDN Cyclic Object.

1let reduxDebugger = createDebugger({ resolveCyclic: true });

Actions Blacklist

You may specify an actions blacklist the same way as with React Native Debugger, by providing an array of strings to match against the action.type field. This feature can be enabled by passing { actionsBlacklist } into createDebugger, where actionsBlacklist is an array of strings.

For example:

1const actionsBlacklist = ['EVENTS/', 'LOCAL/setClock'];
2const reduxDebugger = createDebugger({ actionsBlacklist });

This will exclude any actions that contain the substrings in the blacklist. So an action with type EVENTS/foo will not be sent to the redux debugger flipper plugin, but an action with type LOCAL/anotherAction will.