Programming

Does anyone know any courses for web javascript? like youtube courses and for web javascript, i mean writing js in script tags, using document and window, and intergrating backend with frontend no nodejs or stuff like that. Just javascript, being used in a script tag, being used to dynamically manipulate elements, the DOM, and such. Most tutorials I found was just, explaining how js works, i know how it works, I want to know how to do the communication between front-end and back-end.

[EDIT] I found one person, and while I would like it if you could tell me more courses, i will link his videos, Traversy Media did some videos on Javascript DOM, which basically does what I asked for, i made a playlist: https://www.youtube.com/playlist?list=PLDmZtFPxsV268gyN8XBTgXiVVRXtIRf2o

if for whatever reason the playlist goes down, just search for him. But I would like to hear about alternatives.