title: Scanning QR or barcodes on iPhone or Android in with just HTML 5
body: <p>I was wondering if there is a way to develop a cross-platform HTML 5 app that can scan QR and or bar codes with the phone's camera.  Some of the answers I have seen are a few years old now and so I am hoping this technology has improved.  None of the demos that were mentioned, such as <a href="http://webqr.com" rel="nofollow">http://webqr.com</a>  <a href="http://dwa012.github.io/html5-qrcode" rel="nofollow">http://dwa012.github.io/html5-qrcode</a> <a href="http://www.themedone.com/qr-scanner-generator/scan.html" rel="nofollow">http://www.themedone.com/qr-scanner-generator/scan.html</a> worked on my iPhone 4.  Thank you.</p>