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The Heart Of The Internet

The Heart Of The Internet



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In the realm of internet culture, certain phrases have become shorthand for complex ideas or behaviors that res>
// ...
;

useEffect(() =>
window.addEventListener('resize', handleResize);
return () =>
window.removeEventListener('resize', handleResize);
;
, ); // empty dependency ensures >
c>
window.addEventListener('resize', handleResize);
return () =>
window.removeEventListener('resize', handleResize);
;
, handleResize); // run effect > console.log('hi'));


the function would be created anew each render, so `removeEventListener` with a different reference would not remove it, leaving stale listeners that could leak memory or fire multiple times.



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Summary




Create the listener once (or memoize it) and keep its reference.


Register the listener in an effect (`useEffect`) and return a cleanup function that calls `removeEventListener` with the same reference.


This pattern ensures listeners are removed correctly and avoids memory leaks or duplicate callbacks.



That’s how you properly add and clean up event listeners in React components.