Pseudo classes & elements

Question

What’s the difference between pseudo class and pseudo elements?
Also, why are they necessary? Can’t we just use classes/id’s to target elements?

Answer 1

Pseudo classes are more like attributes whereas pseudo elements are more like extra elements inserted into the DOM. They are extremely useful.

https://css-tricks.com/pseudo-class-selectors/

https://www.w3schools.com/css/css_pseudo_elements.asp

https://css-tricks.com/pseudo-element-roundup/