How can I create a QR code with Firebase?

Question

Is it possible to create a QR code with Firebase?

I'd like to create a QR code for sharing pdf files with other people. It seems the Firebase has such functions but I couldn't figure it out where to generate the code...

Answer 1

Firebase ML-Kit has a barcode scanning API but Firebase does not have a way to create/generate QR codes.

See Firebase ML-Kit: https://firebase.google.com/docs/ml-kit/read-barcodes

Answer 2

Firebase integrates Google Cloud Functions and Cloud Storage. A straightforward way to generate a QR code could be writing a cloud function that takes the input of your call from Firebase, writes the QR code image to your Firebase connected cloud storage, and then returns the URI of the image.

Firebase Cloud Functions "provides a way to extend the behavior of Firebase and integrate Firebase features through the addition of server-side code." source

So, unlike GCP Cloud Functions that can be written in multiple languages, you typically will write Typescript or Javascript only on Firebase Functions.

Example QR Code Generation Code

Example Code for node.js

// index.js -> bundle.js
var QRCode = require('qrcode')
var canvas = document.getElementById('canvas')

QRCode.toCanvas(canvas, 'sample text', function (error) {
  if (error) console.error(error)
  console.log('success!');
})

Documentation References

npm QR Code Generator Package

Firebase Functions Getting Started Guide