This is a very simple QR-Code generator that outputs a PNG-Buffer. It's written in pure JavaScript.
import { qrcode } from 'qrpng';
const uint8array = qrcode('my text for the code');
document.getElementById('qrimg').src = 'image/png;base64,' + btoa(String.fromCharCode.apply(null, uint8array));
It has only one function:
function generate(content[, scale])
scale is the pixel extent of a QR-Code data pixel.
npm install qrpng
This uses "QRCode for JavaScript" which Kazuhiko Arase thankfully MIT licensed. This modules is also licensed under MIT license.