This is a JavaScript library to create a QRCode reader for WebRTC compatible browser.

See a demo: https://advanceboy.github.io/webrtc-qrcode-reader/

1. Include jsqrcode-combined.min.js and webrtc-qrcode-reader.min.js in the lib directory.
2. Create a <div> element with a size you want to show.

   <div style="width: 480px; height: 480px;" id="scanner"></div>
   

3. Call the WebRtcQR.startReaderAsync function on the div element.

   WebRtcQR.startReaderAsync(document.getElementById('scanner');, function (success, result) {
       if (success) {
           // do something when code is read
       } else {
           // show scan errors
       }
   }, { zoomScale: 1.0 })
       .catch(function (e) {
           // show initialize video streaming errors
       })
       .then(function (context) {
           // you got the QRCode reader context.
       });
   

   • callback function will be called on each scanning.
   • The Promise instance signs that the initialize of video streaming was succeed or not.
4. You can configure scanning the through readerContext instance got from the Promise onFulfilled callback.

• scanInterval
  • scanning interval. default: 250(ms)
• zoomScale
  • zoom scaling. default: 1.0
  • This parameter needs to be between 1.0 and 4.0.
  • You can change this parameter after starting the scanning through options property of the ReaderContext.
• decodeSize
  • The temporary canvas size used in decoding. defailt: 480

See LICENSE file.

See the license notice implemented in the source code (jsqrcode-combined.min.js).