This is part 1 of a two-part series covering a full-stack application example.

In this part we walk through setting up a back-end data API, using Google Cloud Functions and Cloud Firestore.

Make sure you have NodeJS installed before proceeding any further. You can check by typing in node -v at the terminal or command prompt.

Usage steps:

1. Log into Google Firebase console
2. Create project
3. Database -> Cloud Firestore
4. Add a collection called 'quiz'
5. Add some documents in that collection

Then:

1. npm install -g firebase-tools

2. mkdir project-folder && cd project-folder

   • make sure you're inside the project folder before the next step

3. firebase init

   • use the arrow keys to move up and down the list of features; we need Functions
   • select Functions with spacebar and press Enter
   • similarly, select the Firebase project name you created earlier
   • for the rest of the init prompts, take defaults, i.e. just press Enter
   • at the end should say something like Firebase initialisation complete

4. open your functions/index.js in code editor

5. paste in code from the file functions/index.js that you'll find in this repo

6. firebase deploy at the terminal or command prompt

   • at the end should say something like Deploy complete
   • deploy needs to be repeated each time you change this code

Make sure that firebase commands like init and deploy are run in your project folder.

Related links and references

• Firebase CLI
• Firebase functions
• Firestore CRUD & queries
• CORS

• Our meetup page
• Our freeCodeCamp page
• Our Slack channel

Post your questions on any of these forums, attend our events, learn and share.

Happy Coding!