@leelexuan/react-qr-scanner

Custom QR Scanner

This library extends the original QR scanning functionality from @yudiel/react-qr-scanner by enhancing user interactions and improving feedback through visual and click-based capabilities.

Features

• Scan QR and barcode formats using a smartphone camera or webcam.
• Visual bounding box states based on an external API response:
  • Red: Code not found.
  • Green: Code found.
  • Yellow: Loading state.
• Mouse-click interaction to detect bounding box clicks.
• Callback functions for:
  • onBoundingBoxClick: Detects clicks within the bounding box.
  • onNewBarCodeDetected: Triggers when a new barcode is scanned.
• Removed audio beep
• New overlay which shows bounding box with code
• Removed tracker and device options

Demo

To see the original library in action, check out Yudiel's Demo.

Install

npm install 

Run

npm run storybook

Supported Formats

1D Barcodes	2D Barcodes
Codabar	Aztec
Code 39	Data Matrix
Code 93	Matrix Codes
Code 128	Maxi Code
Databar	Micro QR Code
Databar Expanded	PDF 417
Dx Film Edge	QR Code
EAN 8	rMQR Code
EAN 13
ITF
Linear Codes
UPC A
UPC E

Scanner Props

Prop	Type	Required	Description
onBoundingBoxClick	(rawValue: string) => void	Yes	Callback function that is called when a bounding box is clicked.
onNewBarcodeDetected	(rawValue: string) => void	Yes	Callback function that is called when a new barcode/qr code is detected.
onError	(error: unknown) => void	No	Callback function that is called when an error occurs while mounting the camera.
constraints	MediaTrackConstraints	No	Optional media track constraints to apply to the video stream.
formats	BarcodeFormat[]	No	List of barcode formats to detect.
paused	boolean	No	If true, scanning is paused.
children	ReactNode	No	Optional children to render inside the scanner component.
components	IScannerComponents	No	Custom components to use within the scanner.
styles	IScannerStyles	No	Custom styles to apply to the scanner and its elements.
classNames	IScannerClassNames	No	Custom classNames to apply to the scanner and its elements.
allowMultiple	boolean	No	If true, ignore same barcode being scanned.
scanDelay	number	No	Delay in milliseconds between scans.