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Welcome 👋

Setting up the front end

  1. Install dependencies

    npm install

  2. Start the app

     npx expo start

In the output, you'll find options to open the app in a

Press j to open up the Native dev tools (debugger), w for the web app version. We will be using Expo Go for development for now.

Troubleshooting

Failed to download remote update

If you are unable to run the app using the Expo Go QR Code and encounter an error like:

Java.io.IOException: Failed to download remote update, you can try again using a wired connection, or run

npx expo start --tunnel

Alternative solutions (if --tunnel does not work):

  1. Disable Windows Defender firewall if you are on Windows:
  • Ensure both devices are on the same network
  • In the terminal when you run npx expo start command, below the QR code you will see a message that displays Metro waiting on exp://192.168.XX.XXX:PORT#. Which is the IP:Port# being used to by expo. Keep this port # in mind.
  • Type and go to Windows Security(looks like a blue shield) in your Search Bar
  • Click on Network Protection > Advanced Settings > Inbound Rules > New Rule > Port > TCP > Specific Port
  • Find the port # that is used by Expo
  • Allow the connection and leave all checked
  • Add Name/Description
  1. Reinstall Expo app, restart computer and connection
  • If there are any issues on Arch Linux, please lmk.

SDK version

  • This app should be using Expo SDK 52, the newest version compatible with Expo Go. Install the latest version of Expo if it does not work:

npx expo start does not work; EPERM issue

  • This means that expo is not able to update and edit your .gitignore when you run npx expo start inside client. To fix this, allow expo to overwrite changes inside your .gitignore, and make sure you have the proper permissions for the file.
  • On Windows: right click on .gitignore inside File Explorer, Properties -> Security -> Make sure user has full control permissions, grant yourself full permissions if not.
  • Then run npx expo start --clear to clear cache.
npm install expo@latest

in the root directory.

Learn more

To learn more about developing your project with Expo, look at the following resources: