ChrisDiscovered the Barcode Detection API
Support for barcode recognition within web apps unlocks a variety of use cases through supported barcode formats. QR codes can be used for online payments, web navigation or establishing social media connections, aztec codes can be used to scan boarding passes and shopping apps can use EAN or UPC barcodes to compare prices of physical items.
Detection is achieved through the detect() method, which takes an image object; either an element, a Blob, ImageData or a CanvasImageSource. Optional parameters can be passed to the BarcodeDetector constructor to provide hints on which barcode formats to detect.