I'm doing project using JavaScript, HTML, CSS for Windows Phone 8.1. And I have to integrate QR Code scanning feature on my app. Please help me on this. I have researched lot but all the samples are based only on Native C# and WP8.0/Silverlight apps.
I recently had to solve that Issue in a WinRT Tablet app that was built with WinJS. After some research, I finally found this excelent post by Vinicius Linck. The sample code in his github repo got me finally started.
The basic idea is that you zxing.net to capture the camera stream into a HTML Video element. Then you "mirror" that element onto a Canvas. Using a timer, you'll then just send the canvas content to the zxing library.
At least in a WinJS Windows Store App, this approach worked perfectly. Just make to sure to read the code in this js file carefully.