How DOM works in js and html

Question

What is the difference .....?

Answer 1

This lessons is quite explanatory go through this one
https://stackoverflow.com/questions/2726554/what-is-the-difference-between-javascript-and-dom
https://www.sololearn.com/learn/jQuery/2825/?ref=app

Answer 2

document.getElementById("myP").innerHTML = "Hello Dolly.";
document.getElementById("myDIV").innerHTML = "How are you?";

Answer 3

Thanks guys 😎