useeffect with cleanup
useEffect(() => {
//your code goes here
return () => {
//your cleanup code codes here
};
},[]);useeffect with cleanup
useEffect(() => {
//your code goes here
return () => {
//your cleanup code codes here
};
},[]);useeffect cleanup in reactjs
import React, { useEffect } from 'react';
function FriendStatus(props) {
useEffect(() => {
// do someting when mount component
return function cleanup() {
// do something when unmount component
};
});
}useeffect cleanup function
function App() {
const [shouldRender, setShouldRender] = useState(true);
useEffect(() => {
setTimeout(() => {
setShouldRender(false);
}, 5000);
}, []);
// don't render
if( !shouldRender ) return null;
// JSX, if the shouldRender is true
return <ForExample />;
}Copyright © 2021 Codeinu
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