Open the App.js file to start writing some code. You can preview the changes directly on your phone or tablet by scanning the QR code or use the iOS or Android emulators. When you're done, click Save and share the link!
When you're ready to see everything that Expo provides (or if you want to use your own editor) you can Download your project and use it with expo-cli.
All projects created in Snack are publicly available, so you can easily share the link to this project via link, or embed it on a web page with the <> button.
If you're having problems, you can tweet to us @expo or ask in our forums.
Snack is Open Source. You can find the code on the GitHub repo.