How to build something like Repl.it?

Question

I want to build something like repl.it but I don't know what I need to know. How do I go about learning how to build something like repl.it where I could create server instances for every user and allow them to code on the browser?

verdverm · Accepted Answer

Start with a full stack app with user accounts, deploy it to the cloud, then add websockets. After that come back and ask again for next steps.