How to learn js correctly?

Question

JavaScript

I can’t figure out how to learn js correctly, I found a task, it was necessary to cross out the text of the list when clicking, I found the code on how to add a class, then I found the code on how to make the class with a strikethrough on click work on the entire list (through a loop) and that’s all , did the task, but I don’t know if it’s right for someone who is a beginner and is learning and learning all this, I then understood everything, what for and why

Answer 1

https://learn.javascript.ru