@osamaq/react-native-template

react-native-template

A minimal template with architecture and boilerplate to let you focus on writing features right away.

Preconfigured with

• TypeScript
• SWR for data fetching/caching.
• apisauce as data fetcher.
• Redux Toolkit for global state.
• Redux Observable for complex background thread-like work.
• React Navigation (v5) for navigation.
• Reactotron in Flipper integration for debugging.
• Sentry for debugging in production.
• react-native-bootsplash because splash screens are cool.
• react-native-svg because svg.
• react-native-config to manage separate environments (dev, staging, production).
• Reanimated for animations.
• Redash its lodash for animations.
• AsyncStorage you're gonna install it anyway.
• FastImage its more performant
• Detox for e2e.
• Mirage JS the easiest way to mock APIs.
• Fastlane for automation.
• handy npm scripts.

Contents

• Documentation
• Getting Started
• Optional Steps
• Credits

Documentation

• Libraries
• Directory Structure
• Quick Overview
• File Walkthrough

Getting Started

Create a new project using the template.

• Note: the command will fail if you have the global legacy react-native-cli installed. Make sure you uninstall it first. More info at react-native-community/cli.

RN 0.63.2

$ npx react-native init MyApp --template @osamaq/react-native-template

Optional Steps

Connect To Sentry

This template comes with Sentry, but its disabled until you connect your account.

To connect your account:

$ cd MyApp/

# For MacOS
$ npx sentry-wizard -i reactNative -p ios android

# Other Platforms
$ npx sentry-wizard -i reactNative -p android

Insert your sentry DSN in each .env file (dev, staging and production) and you're all done.

Install Reactotron Flipper Plugin

This allows you to use Reactotron within Flipper.

Flipper -> Manage Plugins -> Install Plugins -> flipper-plugin-reactotron

Libraries

Let's briefly go over the benefit of each library included in this template.

TypeScript

For type safety ¯\(ツ)/¯

But in all seriousness, if you are considering this template I assume you are a TypeScript fan. If you happen to be a JavaScript user, this template might be overwhelming. If you would like to start learning TypeScript, I suggest bootstrapping with this instead react-native-community/react-native-template-typescript so you can learn at your own pace.

SWR

This library simplifies data fetching and cache management. It allows you to easily show cached data, while the new data is being loaded from the API.

• Caveat: currently it only supports in-memory caching for data.

• Alternative: React Query/Apollo.

apisauce

Its a wrapper around axios with extended functionality. I'm happy with its API and I like the problem matcher.

Redux/Redux Toolkit

I'm happy using Redux Toolkit. It's a lot more concise now and I enjoy the redux ecosystem of plugins.

SWR reduces our dependency on Redux for global state. And sometimes React Navigation can be used to send data to the next screen. I try to leverage these two before reaching out to global state.

If you prefer something else, remove redux and go with that. Do not waste time trying a new state management solution.

Redux Observable

This is used alongside Redux for complex background work. Most people will rarely need to use something like this. In fact, if you aren't sure, just remove it (also uninstall its dependency, rxjs).

React Navigation

It is the most popular navigation library. For most apps, this is the best choice.

Reactotron/Flipper

Using this template there will be two main deubgging tools in your toolbelt. Reactotron and Flipper.

I mainly use Reactotron for reading API calls, asyncstorage operations, redux actions etc. It organizes everything in a neat way. It also has a killer image overlay feature, which allows you to get the UI design pixel prefect.

Flipper could be used for lower level debugging, such as viewing your database or React component tree. There is also a Flipper plugin for using Reactotron within it, so you only need to start one application.

Flipper -> Manage Plugins -> Install Plugins -> flipper-plugin-reactotron

Sentry

Benefitial in debugging issues that occur only in release builds. You can view error stack traces for unhandled exceptions. You can also choose to log specific errors in some catch blocks to study how often they occur in production.

In this template, there is a custom Redux middleware that adds Redux actions as breadcrumbs to Sentry reports for even easier debugging.

This is similar to redux-sentry-middleware but I've yet to test that one.

react-native-bootsplash

Works great for controlling your splash screen.

react-native-svg

Prefer using SVG over images all the time (remember to optimize your SVGs).

react-native-config

If you have different development, staging and production variables, this library is very helpful. It allows you to declare environment variables that can be accessed by all 3 sides (android, ios, JavaScript).

Android: by default, running react-native run-android will use the development .env file. To load .env.staging we must use:

ENVFILE=.env.staging react-native run-android

Note: the above works on MacOS. For windows its a bit different. See Different Environments.

iOS: two additional schemes are created in the Xcode project for staging and production. The corresponding .env file is set via the scheme's pre-action:

NPM scripts for running the app with the desired configuration are included for convenience.

Reanimated/Redash

Necessary when creating complex gesture based animations that are highly performant. Redash contains boilerplate helpers for Reanimated.

AsyncStorage

For caching simple data such as user perferences.

FastImage

Drop in replacement for the <Image/> component. I've found this to give a performance boost on android when rendering many images.

Detox

For end-to-end testing.

Mirage JS

Mirage is an in-memory server for intercepting API calls and returning whatever data you want. Very useful for developing before the backend is deployed, and for confirming how the app reacts to different API call outcomes.

Fastlane

Fastlane community has an endless amount of mobile development automation plugins. I currently use it mainly for automatic versioning, and often for deploying to Microsoft's App Center in one command.

This template also has a fastlane command for adding version badges to app icons. Useful outside of production as it makes it easier for QA to tell the app version.

---

If you appreciate those libraries and find them useful, please consider supporting them.

Directory Structure

root
├── __tests__
├── android
├── e2e
├── fastlane
├── ios
├── scripts
└── src
    └── common
    |   ├── assets
    |   ├── components
    |   ├── exceptions
    |   ├── helpers
    |   ├── hooks
    |   ├── theme
    |   └── types
    └── features
    |   ├── error-boundary
    |   ├── home
    |   ├── landing
    |   └── navigation
    └── redux
    |   ├── middleware
    |   └── slices
    └── services
        ├── cache
        ├── navigation
        └── network
            ├── github
            └── mock

Quick Overview

Quickly get an idea about each folder's role.

Directory	Short Description
root	Root directory. Contains many configuration files and all other folders.
__tests__	(Default; as per official template)
android	Android project. Includes modifications to integrate libraries.
e2e	Detox end-to-end tests and configurations.
fastlane	Useful fastlane automation scripts.
ios	iOS project. Includes modifications to integrate libraries.
scripts	Handy node scripts for code generation.
src	Most of the app's code is here.
common	Shared code between different features.
assets	Shared images, fonts etc.
components	Shared React components.
exceptions	Shared custom exceptions.
helpers	Shared utlities.
hooks	Shared hooks.
theme	Shared styles; app's theme.
types	Shared general types.
features	Feature directories.
error-boundary	Root error boundary.
home	Home screen. Has simple data fetching and global state examples.
landing	Template's initial screen.
navigation	Contains a simple stack navigator.
redux	Redux integration.
middleware	Redux custom middleware. For now, a simple Sentry breadcrumb logger.
slices	Redux state slices.
services	App's services.
cache	Cache service; AsyncStorage wrapper.
navigation	Navigation service (navigate from outside React components).
network	Networking related services.
github	Example GitHub API client (REST).
mock	MirageJS in-memory server for mocking backend APIs.

If you would like to learn more without going through the codebase, read the file walkthrough here.

Credits

This template is modified from react-native-typescript-template. Thank you ❤️