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qr code - QR Datamatrix scanning only works upside down - Zxing scanner using Angular 9 - Stack Overflow
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Scanning Barcode or QR Code in an Angular App with Zxing | by Carlos del Bosque | The Startup | Medium
GitHub - devpato/angular-pwa-qrcode: Angular PWA that generates a QR code of your guest so you can check them in by scanning their code
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