RayCaster

This is my attempt at creating a simple ray caster. There may be a few issues, but it generally works.
Example of the raycaster:

References:
On javascript and html:
https://www.youtube.com/watch?v=yq2au9EfeRQ
On raycasting:
https://lodev.org/cgtutor/raycasting.html
On raycasting:
https://www.youtube.com/watch?v=eOCQfxRQ2pY&t=777s
Main source of inspiration:
https://www.youtube.com/watch?v=vYgIKn7iDH8&list=LLfRrVCCymB_kgXJU5PwwAQg&index=13&t=1502s