Environment Variables in Expo using Release Channels

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Expo has recently released Release Channels that allow you to deploy, rollback and test your app with different users by just adding the --release-channel flag on the publish command.

One of my favorite things about Release Channels is the ability to define pseudo environment variables so I can easily switch between dev, staging & prod.

Here’s how I do it:

An example of handling environment variables in Expo using Release Channels

The reason why I use indexOf is because I’ll release new versions of my app based on the package.json version. That way I keep things sync’d up across the entire Orchard ecosystem:

exp publish --release-channel staging-1.20.1
exp publish --release-channel staging-1.21.0
exp publish --release-channel prod-2.0.0

**Note:

  • In the current release of Expo v24, the releaseChannel key DOES NOT show up in dev mode.
  • In future releases, the releaseChannel key may show up as undefined. DO NOT quote me on this, its just speculation.

Fun things to do: