All 12 useState & useEffect Mistakes Junior React Developers Still Make in 2024

Hi, I'm Wesley. I'm a brand ambassador for Kinde (paid sponsorship).

👉 Discord: all my courses have a private Discord where I actively participate

⏱️ Timestamps:
0:00 Intro
0:06 12/12 - State updates aren't immediate
2:35 11/12 - Conditional rendering
4:46 10/12 - Updating object state
7:59 9/12 - 1 Object state instead of multiple smaller ones
11:25 8/12 - Information can be derived from state / props
14:32 7/12 - Primitives vs non-primitives
19:05 6/12 - Initializing state with object
22:12 5/12 - TypeScript mistakes
27:19 4/12 - Not using custom hooks
30:59 3/12 - Server & Client components
33:08 2/12 - Stale closure
38:42 1/12 - Fetching in useEffect

#webdevelopment #programming #coding

[bushbuddyplatypus]

I am a grumpy and impatient senior dev who was soothed by your calm voice and clear explanations. Also learnt a few things. Thanks.

[crizwiz]

I really love how direct and precise it is with handle certain react problems. Please do more of this format of videos.I learnt a lot and I appreciate you man. Keep it up

[ProgramWithErik]

This is crazy how much you've blown up in the last month! I saw you've created nearly 400 videos in one year, getting 50-100 views per video until recently! It's really inspiring how you never gave up!

[rushboy]

Absolutely fantastic video. As a kinda newbie to NextJS and REACT, I was happy that I'd figured out most of these on my own, but some of them (the object item name in brackets trick) will really help get my code leaner.

[seventyMinus]

I am a self-taught frontend developer. I know many teachers who teach online, but trust me, the way you explain things is so easy to understand. To me, you are the best teacher. I can't thank you enough. If I had money, I would have definitely bought your courses. Anyways Thank you so much for giving us your valuable time, and I love you.

[Bukosaure]

I am now quite experimented with React and already knew everything you covered in the video. But I still want to say that this video is pure bomb. The amount of useful information contained in it is quite impressive and really straight to the point. I would have love to have seen it about a year ago. :)

[alessandrospiridigliozzi]

One of the best videos on React!!!! I've been working as a dev with react for over 1 year now and there were a lot of things in this video that I did not know! Most online courses never fully explain what happens underneath the hood, so thank you!!!

[theshahbazahmad]

Brother you solved many of my doubts. You have no idea how helpful and important these kind of videos are for me. Keep making such videos. Full support mate!

[tomkatdev]

A really great run through of correct patterns and component lifecycles mate, As someone who is 2 years into react, and 9 months or so into ts, I found this a really nice way to confirm my existing understanding, and clear up a few points I had only somewhat understood. Thanks for this :)

[personal]

You somehow have managed to address every one of my concerns or gaps I believed I had in my knowledge across all your videos on react and Javascript. Thank you 🙏

[ovwgqdh]

이야 강의가 너무 기가 막혀요🥰👍 궁금했던 부분을 시원하게 긁어주는 기분이네요 감사합니당

[elidonmorina]

Great one! Straight to the point, typical and practical life examples! Keep it up and the volume a bit up for the future videos haha

[oru]

The first case actually helped me a lot! At my job I was fixing a bug and couldn't figure out why component state was behaving wierdly, tourns out it was the multiple setState (although not direct) calls in one useEffect that were the problem

[codefrite]

Incredibly dense content full of nice tricks, best practices and clear concepts explanations. It felt like learning "the right way" of coding things in modern JS. This is the first video I watch from you and it made me buy your Udemy JS course. I'll be spending the day watching it. Looking forward for a TS course :) Cheers from Belgium !

[Larriisama]

This was really helpful, I recognize a few mistakes I've done and though I've worked around the errors, your explanations gave me a better understanding to why I saw errors or such. Really cool vid and most of all thanks for sharing. I've just recently gotten serious about next.js but before that I used to fetch data in a useEffect much like you said

[goodtimeswerehad]

Fantastic video! First one of yours I've come across (thanks YouTube). I'm now a subscriber

[Grozny]

thanks a lot, useful video. i'm not a begginer but often i don't think about to do some more cleaner if it works. you have fixed my mind

[phucnguyen]

I gotta thank the algorithm for recommending me this video, Wesley! You solved so many things that I was curious in the past! And with Udemy having a big sales event atm I might just grab both of your CSS + JS courses!

[bennzeppelin]

Nice touch flipping the video as you move from editor to console 😄
Very helpful vids thx

[mikeh]

Great video. These quick reminders are very helpful! Especially because you often see multiple ways of doing the same thing but no one explains why it works.