How to add an online QR scanner to the site?

Question

PHP

How to implement a scanner on the site, perhaps there is some kind of ready-made solution, any language.
The main thing is that it works :)
Similar to how on this site - https://www.qrstuff.com/scan
If you open it from a mob. device, will request access to the camera, and if you allow it, the camera will open in the window and, when you hover over the QR code, it will display a message.
How to embed such a page on the site? Thank you.

Answer 1

https://github.com/schmich/instascan
https://atandrastoth.co.uk/main/pages/plugins/webc...
I want to note that access to the camera is carried out only via the https protocol.