It's common knowledge that NPAPI will soon be eliminated from Chrome.
Is there a substitute for the Jzebra/QZ Java plugin that allows for raw printing (sending raw ESC/P commands) to POS printers?
Are there any Chrome APIs (based on HTML5 and Javascript) that can take over the communication between the browser and locally connected POS printers via USB or Ethernet?
Is there a Chrome API (HTML5 and Javascript) that can facilitate communication between the browser and locally installed POS printers in USB or Ethernet?
Update: While a pure HTML5 solution exists for USB devices, examples are currently scarce and browser adoption has been slow:
With the removal of NPAPI, the prevalent solution involves WebSocket connections to localhost or cloud-enabled printers using HTML5 and JavaScript.
This approach is utilized by:
In terms of Point-Of-Sale specific printing, a comprehensive solution meeting requirements of pure HTML5 and JavaScript with wide adoption remains elusive. Utilizing desktop-installed middleware or server-side options is presently the recommended approach to achieve the desired functionality.
It is important to note that we are the creators of QZ Tray.
If you're looking for an easy solution, consider using PrintNode. Their desktop client and JSON API are user-friendly and efficient. Additionally, they offer a variety of libraries that can be helpful: https://github.com/PrintNode/
I've been quite successful using Epson's ePOS-Print JavaScript SDK. This particular software is tailored specifically for Epson printers and necessitates a network interface card compatible with ePOS (UB-E04/R04).
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