How to use barcode scanner for POS-Shop System (ReactJS)?

I would like to create POS-Shop system, and then I use barcode scan Product to sale.
I base on Meteor + React JS, Pl help me.

Any luck on finding a solution?

If we are talking a hand held scanner that connects via USB or Bluetooth then you can probably use WebUSB or WebBluetooth. Otherwise you probably have to use Electron to get access to things like serial ports.