How can I check element class name in JavaScript and how to change it?not classList

Question

I've tried elementname.classList== "new_name"; to change it and it didn't change it and I want to be able to check the class name beyond just it's existence literally it's name, console.log(element.classList ) doesn't show it..

Answer 1

element.classList.contains("myStyle");

Answer 2

For this reason will be here each time repeated, please link your code with the question.

Answer 3

elementname.classList.add("new_name")

Answer 4

Thanks but it didn't work