Stop useEffect React Hook re-render multiple times with Async call - Tutorial - useEffect cleanup.

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❗️Today I share a quick trick on how to stop unwanted responses from re-rendering a react component whose useEffect has an async function.

I ran across this problem when making an API call when a component rerendered.

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WHO AM I: I'm Dylan, a Cloud Engineer living in Bend, Oregon. I use my background in AWS and React to make videos that enable and grow businesses.

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🌍 My website / blog -

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I am glad that you slowly show the flow of the code as it "bubbles" through. I press D this starts, it goes here, than jumps there, then there etc. Well done.

maXXik

I'm facing this problem in a project where I'm working. I couldn't solve this, but I finally understand how the clean up works. Thank you mate.

andremelo

Such a simple solution. Love it! I had to move "isCanceled" to outside the useEffect hook because I had strict mode enabled.

farid

Nice video, not sure it's my problem, but I learnt something none-the-less...had no idea the cleanup gets called the next time the useEffect is called, thanks!

matthewbeardsley

Kudos, Dylan. I tried out your code and it worked just fine. Thanks a lot.

kikevanegazz

Why are we getting red dots?!"

I feel that one 😂

DevOpsDirective

Shit man youre giving the answer on my problem that ive been struggling within hours, great video... thanks

bananas_

Thanks for making this simple to grab.

fosimuboolubo

You can use useDebounce hook instead all of these stuff.

imammahadi

Great video man. Keep making videos! Maybe make into oh who you are and what you do much shorter. Then jump right into the problem statement, why it’s a problem, where it’s applicable, and then jump directly into the solution

lacascadaobregon

It fixed the doubled "mounting" but now i want to call a function when i unmount... how can i call this only once?

raqha

I guess important thing in here is to knowing scope chain and closure.

hasanbiyik

Awesome. More videos on reactJs ... 🎊

rohit

I thought that useffect wouldn't keep the isCancelled variable on return() and that it would re-initialise it on 2nd call again (as would happen on topical variable on a normal function 2nd call) from the beggining, thanks to showing me how begginer i am on React:P

ppgg

useEffect still runs every time we type, we just don't call the alert base on a flag, does it have any problem with performance ?

thanhngo-ngci

Could u tell me the name of vscode theme, plz

huynguyenquoc

Look at that, there ARE other engineers in Bend OR

boot-strapper

This is called "race condition" right?

rodrigovazquez

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