DOMException on page reload

[luke-z]

Hi there

I've been experimenting with your app and found an issue.

On reloading the page with my notebook, it returned an exception (DOMException: Could not start video source).

After trying a few things, I figured out the problem.
On my notebook, it tried to access the IR camera and thus somehow couldn't free it up afterwards.

I solved it by adding
&& !device.label.includes('IR')
to the if statement mentioned below.

Maybe there's another way to solve it.

Best regards
Luke

qr-code-scanner/app/js/vendor/qrscan.js

Line 78 in ec539ff

if (device.kind == 'videoinput') {