Guide: Firebase Cloud Functions

To deploy Firebase Cloud Functions, we must:

• Create a Firebase project
• Create a Noderize app
• Configure

Requirements

You must set up the Firebase CLI before setting up Functions.

Quick Firebase CLI setup:

yarn global add firebase-tools
# or
npm install -g firebase-tools

# then
firebase login

Project Setup

Create a directory to be used as your project root (for Firebase). Set up Firebase using firebase init, and do not select the Functions options when creating.

Next, create a Noderize project inside your project root called functions.

Note: You may change the directory name (defaults to functions) with the functions.source key in firebase.json.

Setup

You will need to add the Firebase-specific dependencies and scripts.

First, add the dependencies:

yarn add firebase-admin firebase-functions
# or
npm install firebase-admin firebase-functions

Next, add these scripts to your package.json:

{
    "scripts": {
        "...": "...",
        "prepack": "noderize-scripts clean && noderize-scripts build --env production",
        "preserve": "npm run build",
        "serve": "firebase serve --only functions",
        "predeploy": "npm run prepack",
        "deploy": "firebase deploy --only functions",
        "preshell": "npm run build",
        "shell": "firebase experimental:functions:shell",
        "logs": "firebase functions:log"
    }
}

This will allow you to use the serve, deploy, logs, and shell command from Firebase.

Done!

Demo

Replace src/index.js by:

import { https } from "firebase-functions";

export const test = https.onRequest((req, res) => {
    res.send("Hello world!");
});

Then run yarn serve or npm run serve. You will see it build, then serve the function. Clicking the function link will show Hello world!.