How to build an Expo Library using Native Modules

A tutorial on how to create native modules using Expo!

Device:
* Android 13 Pixel 7
* iOS 16 iPhone X

=========================
00:00 Introduction
01:33 Set up the Project
06:57 Android Implementation
14:14 Android Result
14:48 iOS Implementation
17:22 iOS Result

[dylanclements]

So glad someone’s made a video on this topic, I got so lost in the documentation. Thanks so much

[jjrise]

Love your topics for videos. It’s like the practical side of RN. Keep it up!

[ggchicote]

Thanks dan! My first approach with Native Modules. Even though I found it a bit hard - mainly the Kotlin part -, it went well. Thanks

[Forfiter]

Hi, when i am adding a native library which is inside the project how i have to link it to the module to be able to use it?

[nikhilranka]

Thanks for creating this concise tutorial.
Wanted to know how simple it is to build a native UI and show it in a React Native app.

[uniquity]

How should AsyncFunction work in a Swift module? I have been trying to fetch Apple MusicKit data from a function but I get an unhandled promise rejection with Error: Received 0 arguments, but 1 was expected. The only parameter defined on the expo AsyncFunction is promse: Promise so not sure what is going on

[dhananjay]

I have a doubt that's indirectly related to expo architecture, does Expo Module Internally use expo dev client for building project? Or if I decide to use expo module in existing project I have to add dev client as dependency, because I always get confused between dev client and expo pre build

[kingdan-x]

My example folder has no other folders in it. Has anyone else had issues finding this folder?

[edxmo]

Would it be possible to add android native dependencies to the expo modules? Like I don't know using a maven library along with your custom native code? Sorry if the question seems stupid, I'm just getting started into integrating native dependencies in react native projects

[andrzejhanusek]

Great content! BTW, If I would like to use this new approach and don't want to publish my modules on npm (even on private npm) do I have to use monorepo approach? Because it's not possible to keep those modules alongside app code, or I'm missing something?

[diodnnw]

Great Video! Is there any way to run expo-module-scripts using windows OS

[AsgardMarcella]

Hello I tried to generate some numbers with Expo React Native, but the app every Time, Do you think if i create a react Native plugin in Java it will be Lighter ?

[Raiwulf]

how do you get your profile under tab automatically at 1:59?

[EdwinRebolledo]

Could you explain how to publish as a library on npm? please

[anseev]

Weirdly enough, got an error saying that could not be found. Fixed by installing it from within the 'example' folder with npm ('npm i Might be specific to me, but leaving it here just in case anyone else stumbles on the same thing.

[alexyip]

Thanks! Is may have a way to use a C++ module in Expo native modules? I really wanna know about that! bro

[vladimirvucetic]

Do you maybe know how in kotlin to import Promise when using expo modules.import expo.modules.core.Promise? This seems not working?

[stevenmajek]

Gettting "npm install exited with non-zero code: 1" while using the following command: "npx create-expo-module my-module". Any help?

[ahmedgameel]

When I try to build it using eas it fails with gradle error

[NicholasEduardo]

I was working with RN, but don’t expo. It’s not hate, but I don’t feel good working with that.
Now I can change my opinion with evolution of expo and use it in production?