Add Screen Sharing to my web app? [closed]

I have to make a web application that imitates Skype. I am using php, javascript, html and css to do this. I am allowed to use open-sourced libraries and other libraries.

I need to implement a screen sharing feature. How do I do this? My research led me to believe I need to code a java applet but I have no idea how to do this. This was assigned today and I just have 3 weeks to implement it. How should I do this?

How do I enable screen sharing permissions in Chrome?

From the Privacy tab select the “Screen Recording” setting from the left-side list. Check the box next to Google Chrome (or the browser you are using - Safari/Firefox/Edge etc) to allow screen sharing for your video call/meeting.

Why is my screen share not on?

Restart Your Device A restart often resolves most computer problems, including screen sharing issues. If using a Mac, go to the Apple menu and choose Restart. And if you are using a PC, open the Start menu, select the power option and click Restart.

You may find one of those projects useful: