What is the difference between id and class on CSS?

Question

I know that the major difference between id and class is that id can be used once per page but classes can be used as many times on a page as needed.

Please clearify this statement and this question. 😊

Answer 1

You mistly have the differences stated in your question. If I want a .red class that simply assigns the color #FF0000 to whatever it's associated with, then that's fine; however, it's not good practice to do that with IDs. Think of a class as more general, while the ID is more specific.

Answer 2

https://code.sololearn.com/W7X805sc4DPC/?ref=app

Answer 3

Got it.
Thanks @Mario L.

An id is unique. It refers to one element. It may occure only once in the document.

Classes define several related elements. If a class is addressed (e.g. by CSS or JavaScript) all elements belonging to that class are affected.