LifeCycleUnmount.jsx

const FunctionalComponent = () => {
 React.useEffect(() => {
   return () => {
     console.log("dadaaaah");
   };
 }, []);
 return <h1>Selamat tinggal</h1>;
};

class ClassComponent extends React.Component {
 componentWillUnmount() {
   console.log("dadaaaah");
 }

 render() {
   return <h1>Selamat tinggal</h1>;
 }
}