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https://github.com/mmazzarolo/react-native-universal-monorepo

React Native boilerplate supporting multiple platforms: Android, iOS, macOS, Windows, web, browser extensions, Electron.
https://github.com/mmazzarolo/react-native-universal-monorepo

android electron ios macos react react-native react-native-web windows

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React Native boilerplate supporting multiple platforms: Android, iOS, macOS, Windows, web, browser extensions, Electron.

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README 

        
# React Native Universal Monorepo



An opinonated approach to supporting multiple platforms with React Native using a Yarn Workspaces monorepo.  



Check out __[Running React Native everywhere](https://mmazzarolo.com/blog/2021-09-11-running-react-native-everywhere/)__ for an in-depth guide on how and why I recommend trying out this approach if you're planning to support multiple platforms in your app.  

- [Overview](https://mmazzarolo.com/blog/2021-09-11-running-react-native-everywhere/)

- [Yarn Workspaces monorepo setup](https://mmazzarolo.com/blog/2021-09-12-running-react-native-everywhere-monorepo/)

- [Android & iOS](https://mmazzarolo.com/blog/2021-09-18-running-react-native-everywhere-mobile/)

- [Windows & macOS](https://mmazzarolo.com/blog/2021-09-19-running-react-native-everywhere-windows-macos/)

- [The Web](https://mmazzarolo.com/blog/2021-09-22-running-react-native-everywhere-web/)

- [Browser Extensions & Electron](https://mmazzarolo.com/blog/2021-09-25-running-react-native-everywhere-electron-browser-ext/)



 





  




## Overview



This monorepo uses [Yarn workspaces](https://classic.yarnpkg.com/en/docs/workspaces/) and [TypeScript](https://www.typescriptlang.org/) to support a modular React Native project.  



The core idea is to isolate the JavaScript app code from the platform configurations (native code + the app bundlers like Metro and Webpack).  

This isolation happens by using different [workspaces](https://classic.yarnpkg.com/en/docs/workspaces/): We have an `app` workspace for the JavaScript app code, a `mobile` workspace for the React Native mobile configuration, a `macos` workspace for the React Native macOS configuration, and so on.  



We fully embrace [Yarn `nohoist`](https://classic.yarnpkg.com/blog/2018/02/15/nohoist/) to allow using different versions of React Native on each platform (which is recommended but not required), simplifying the adoption of new React Native updates.  

Thanks nohoist, each platform workspace (`mobile`, `macos`, etc.) can depend on any React Native version, regardless of what version the other platform workspaces are using. 

For example, we can use `[email protected]` on the mobile app and `[email protected]` on the macOS app — as long as the JavaScript app code supports both versions.  

This approach promotes gradual React Native updates over updates in lockstep.  



For more details, check out ["Running React Native everywhere: Yarn Workspaces monorepo setup"](https://mmazzarolo.com/blog/2021-09-12-running-react-native-everywhere-monorepo/).  



> ⚠️ Please notice that I'm not saying this is the _right_ way to do React Native monorepos. This is just an approach that I enjoy using on larger codebases :)



## Supported platforms



- Android (React Native 0.65)

- iOS (React Native 0.65)

- Windows (React Native 0.65)

- MacOS (React Native 0.63)

- Android TV (React Native 0.65)

- tvOS (React Native 0.65)

- Web (React Native 0.65)

- Web - Browser Extension (React Native 0.65)

- Web - Electron (React Native 0.65)

- Web - Next.js (React Native 0.65)



## Getting started



You can use this repo as a boilerplate, removing the workspaces of platforms that you don't need, or you can create this setup from scratch if you want to fully understand how it works. 



### Using this repository as a boilerplate



1. Clone the repository: `[email protected]:mmazzarolo/react-native-universal-monorepo.git`

2. Run yarn install `cd react-native-universal-monorepo && yarn` 



### Create this setup from scratch



Step by step tutorial on creating this repository from scratch: 



- [Overview](https://mmazzarolo.com/blog/2021-09-11-running-react-native-everywhere/)

- [Yarn Workspaces monorepo setup](https://mmazzarolo.com/blog/2021-09-12-running-react-native-everywhere-monorepo/)

- [Android & iOS](https://mmazzarolo.com/blog/2021-09-18-running-react-native-everywhere-mobile/)

- [Windows & macOS](https://mmazzarolo.com/blog/2021-09-19-running-react-native-everywhere-windows-macos/)

- [The Web](https://mmazzarolo.com/blog/2021-09-22-running-react-native-everywhere-web/)

- [Browser Extensions & Electron](https://mmazzarolo.com/blog/2021-09-25-running-react-native-everywhere-electron-browser-ext/)



Tutorial for the TV and Next.js platforms from [@thefinnomenon](https://github.com/thefinnomenon):  

- [Adding tvOS & Android TV Support to Monorepo](https://finnternet.com/dev/blog/react-native-tv-monorepo)

- [Next.js in React-Native Monorepo](https://finnternet.com/dev/blog/nextjs-monorepo)



Additional resources:  

- [Run your React Native app on the web with React Native for Web

](https://mmazzarolo.com/blog/2020-10-24-adding-react-native-web/)

- [Building a desktop application using Electron and Create React App](https://mmazzarolo.com/blog/2021-08-12-building-an-electron-application-using-create-react-app/)

- [Developing a browser extension with Create React App](https://mmazzarolo.com/blog/2019-10-19-browser-extension-development/)



## Available commands



Development and build commands:



- `yarn android:metro`: Start the metro server for Android/iOS

- `yarn android:start`: Start developing the Android app

- `yarn android:studio`: Open the android app on Android Studio

- `yarn ios:metro`: Start the metro server for Android/iOS

- `yarn ios:start`: Start developing the iOS app

- `yarn ios:pods`: Install iOS cocoapods dependencies

- `yarn ios:xcode`: Open the iOS app on XCode

- `yarn macos:metro`: Start the metro server for macOS

- `yarn macos:start`: Start developing the macOS app

- `yarn macos:pods`: Install macOS cocoapods dependencies

- `yarn macos:xcode`: Open the macOS app on XCode

- `yarn web:start`: Start developing the web app

- `yarn web:build`: Create a production build of the web app

- `yarn electron:start`: Start developing the Electron app

- `yarn electron:package:mac`: Package the production binary of the Electron app for macOS

- `yarn electron:package:win`: Package the production binary of the Electron app for windows

- `yarn electron:package:linux`: Package the production binary of the Electron app for linux

- `yarn browser-ext:start`: Start developing the browser extension

- `yarn browser-ext:build`: Create a production build of the browser extension

- `yarn windows:metro`: Start the metro server for Windows

- `yarn windows:start`: Start developing the Windows app

- `yarn tv:android:metro`: Start the metro server for Android TV

- `yarn tv:android:start`: Start developing the Android TV app

- `yarn tv:android:studio`: Open the Android TV app in Android Studio

- `yarn tv:tvos:metro`: Start the metro server for tvOS

- `yarn tv:tvos:start`: Start developing the tvOS app

- `yarn tv:tvos:xcode`: Open the tvOS app in XCode

- `yarn tv:tvos:pods`: Install tvOS cocoapods dependencies

- `yarn next:start`: Start the Next.js app

- `yarn next:build`: Build the Next.js app

- `yarn next:serve`: Serve the Next.js app build



Other commands (we use [ultra-runner](https://github.com/folke/ultra-runner) to run these commands on all workspaces): 



- `yarn lint`: Lint each project

- `yarn lint:fix`: Lint + fix each project

- `yarn test`: Run tests of each project

- `yarn typecheck`: Run the TypeScript type-checking on each project



## Native dependencies



While working on React Native in a monorepo, you'll notice that several packages won't work correctly when hoisted — either because they need to be natively linked or because they end up being bundled twice, breaking the build (e.g., `react`, `react-dom`).  

This is not an issue with the approach used in this project per se. It's more of a common problem with monorepos.  



To fix these issues, [we mark them as nohoist](https://classic.yarnpkg.com/blog/2018/02/15/nohoist/), so they will be installed in each package that depends on them.  



In this monorepo, you can see an example of such libraries in `react-native-async-storage`.  



In the metro bundler and Webpack configs used across the monorepo, [we're using a set of build-tools](https://github.com/mmazzarolo/react-native-monorepo-tools/) to ensure nohoisted packages are resolved correctly.  

So, as long as you add these libraries [to the `nohoist` list](https://github.com/mmazzarolo/react-native-universal-monorepo/blob/a7dcfcbe7c7df66f6d11f06dd13f51ff94b1e70c/package.json#L9-L19), you should be good to go 👍  



## Yarn Classic vs Yarn 2+



We're striving to make this setup compatible with Yarn Classic — but, [with a few tweaks](https://yarnpkg.com/getting-started/migration), it's compatible with Yarn 2+ as well (providing all Yarn 2+ benefits).  

See [#22](https://github.com/mmazzarolo/react-native-universal-monorepo/issues/22) for more info. 



## Setting up Yarn 2+



1. Run `yarn set version berry` at the root of project. It will create a `.yarnrc.yml` file. 

2. Add the following lines to `.yarnrc.yml` to ensure `node_modules` directories are all created in each workspace:

```yml

nodeLinker: node-modules

nmHoistingLimits: workspaces

```

3. `nmHositingLimits` tells how to hoist dependencies for each workspace. By setting it to `workspaces` all dependencies will be installed in each workspace's `node_modules` rather than being hoisted to the root folder. This means you can now you can safely the `noHoist` section in the root's `package.json`. 



Check out [Yarn 2+'s "getting started" guide](https://yarnpkg.com/getting-started/install) for more info.  



## Known issues



In some cases, Yarn Classic won't be able to resolve correctly dependencies that have a `peerDependency` on `react-native`.  

See [#22](https://github.com/mmazzarolo/react-native-universal-monorepo/issues/22) for a few workarounds. A fix on the `react-native-monorepo-tools` repo [is on the work](https://github.com/mmazzarolo/react-native-monorepo-tools/issues/9). 



## Contributing



Contributions, discussions, and feedback are welcome! Please ask if there are any active plans on feature changes before submitting new PRs 👍