How does Webpack hot reload work?

Question

Frontend

Hello.
I want to understand how Webpack hot reload works. It is logical to assume that the server sends the "refresh" command to the page via websocket, but I do not see any socket in the chrome network panel.
Thanks in advance

Answer 1

https://www.youtube.com/watch?v=o0NJQYWR7BI
And if you want a little more, then in principle the whole part 8 from the screencast