Are class components still needed in React? Is there something that can be done in class components but not in functional ones?

In modern versions of React, class components are almost unnecessary, as functional components with hooks cover all their capabilities and even more. Hooks allow managing state, side effects, context, and refs without the need to write classes.

Previously, class components were necessary for using lifecycle methods and local state, but now all of this can be done with hooks, such as useState, useEffect, useRef, and others.

Is there anything that can be done in class components but not in functional ones? Currently — no. All features of class components are available in functional components. Classes mainly remain for maintaining old code or specific cases, but new projects are recommended to write functional components.