Barcode Scanning User Experience

Your component can deliver any user experience you desire, but there’s a common flow for any component that can scan a barcode.

A Lightning web component displays a button (or other user interface control) to start a scan.
When the button is pressed, BarcodeScanner invokes the mobile device’s user interface for the camera and barcode scanning function. When the camera detects a valid barcode, it displays a bounding box around the barcode, reads the data from the barcode, and returns the result to the Lightning web component that invoked it.
The Lightning web component displays or otherwise processes the results of the scan.