<ul><li>In class components, state is declared and updated using this.state and this.setState. In functional components, state can be managed using the useState hook.</li><li>Class components use lifecycle methods like componentDidMount and componentWillUnmount for side effects. The equivalent in functional components is useEffect hook.</li><li>In class components, methods are often bound to 'this' or class fields, whereas in functional components, functions are defined within the component scope, eliminating the need for binding.</li><li>Functional components receive props as function arguments, while class components access props through this.props.</li></ul>

How To Rewrite Class Components to Functional Components in React

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