qr.js | javascript qrcode library | QRCode Processing library

You had done most of the hardwork. The result.Name is of Type Newtonsoft.Json.Linq.JValue. You only had to take the Value from it using the JValue.Value property

For second library I missed that it expects ImageData and I pass Binary Data.

Thus, we have 3 solutions how to convert Binary Data to ImageData:

1. Use createImageBitmap Kaiido solution with some updates, as proposed in comments doesn't work.

You can replace these very calls to new Uint8ClampedArray([0]) and new Uint8ClampedArray([1]). That will do exactly the same, with better browser support.

To save the value in input box should not use "resultDiv.innerHTML = s;" Rather you should use "resultDiv.value = s" which will save your code to input box which you can use to save in SQLite Database.

You haven't registered your main module yet.

AppRegistry.registerComponent('Main', () => App); Please add this line to the bottom of your class and check if the problem persists.

I suspect you're having issues with the recursion involved. Here is a sample to get you going.

WARNING. It's written synchronously to make it easier to grok and does not check for non-files (symbolic links, sockets, etc) but should get on the right path. I've also used string interpolation to build paths ... you should use path.join