QR code printing using Brothers PT-9700 printer

If you mean you are already creating QR barcode images at the client side (JavaScript), and you want to print the generated QR image to Brothers PT-9700 printer, the following code shows how you can print an image using JavaScript:
https://stackoverflow.com/questions/2909033/using-javascript-to-print-images

However, if you mean you want to know how to create the QR barcodes on images before sending them to the printer, you can try using .NET Barcode engine from LEADTOOLS to write QR barcodes at the server side (Web-Service), return back the generated QR barcode Image to the client, and then print it as mentioned above.
The following online help topic contains sample code that shows how you can create QR barcodes using .NET LEADTOOLS classes:
https://www.leadtools.com/help/leadtools/v19/dh/ba/qrbarcodedata.html
You can use the same code in a Web-Service project that receives QR data from the client (JavaScript), create QR Barcode on images and then you can either send the QR Image directly to the printer at the server side, or pass the generated QR barcode image back to the client so that it can be printed locally.

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Maen Badwan8y ago
If you mean you are already creating QR barcode images at the client side (JavaScript), and you want to print the generated QR image to Brothers PT-9700 printer, the following code shows how you can print an image using JavaScript:
https://stackoverflow.com/questions/2909033/using-javascript-to-print-images

However, if you mean you want to know how to create the QR barcodes on images before sending them to the printer, you can try using .NET Barcode engine from LEADTOOLS to write QR barcodes at the server side (Web-Service), return back the generated QR barcode Image to the client, and then print it as mentioned above.
The following online help topic contains sample code that shows how you can create QR barcodes using .NET LEADTOOLS classes:
https://www.leadtools.com/help/leadtools/v19/dh/ba/qrbarcodedata.html
You can use the same code in a Web-Service project that receives QR data from the client (JavaScript), create QR Barcode on images and then you can either send the QR Image directly to the printer at the server side, or pass the generated QR barcode image back to the client so that it can be printed locally.