Quick help with Jscript code for AR.js project

Hey there, I have a small AR project for web that is working on a local host. It works fine but I just need some assistance updating my git files with a Jscript solution to helo choose a front/back camera on a mobile device. The solution already exists, however I would still need a programmer to implement this right. Please reach out only if you think you could handle this right and do it today, thanks! Solution : [login to view URL]