/** You can’t use useEffect (or any other hook) in a class component. 

 * Hooks are only available in functional components. 

 * If you want to refactor your lifecycle methods to use useEffect, 

 * you have to refactor entire class components writ large. 

 * This is both time-consuming and prone to error. 

 * What if you could refactor just this one part of the code?

 */

​

​