6 State Mistakes Every Junior React Developer Makes

React useState tutorial beginner to advanced. React useState best practices and solutions to the most common state problems. Functional update, white screen problem, derived states, and more.
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00:00 useState Functional Update (Why useState doesn't update immediately?)
02:54 React useState white screen problem fixed
05:56 React useState How to update a specific object property?
09:27 React How to change all inputs with a single onChange?
11:17 useState vs useReducer (When to use?)
12:53 Be careful about React derived states!

[@lionelsamain2348]

Hey, I just wanted to let you know that I graduated this year. I finally have my Bachelor degree in management developement. And this is (partially) thanks to you ! I followed your Netflix tutorial and it helped me tremendously for one of my last assignments. So you can go to sleep tonight knowing you made someone else's life better. I'm 33 and this bachelor degree is my second one. I decided to study it while working for a job I hated in order to get out of it. It already opened so many opportunities to me and completely changed my professional life and my career perspectives. Thanks a lot, I'll keep following your videos because I learn so much every time.

[@itsaaron6423]

Woah am 23 and fretting about my whole life. I better find a job quickly....

[@slipstream01]

hey did the netflix tutorial help learn react or are you alread good with all the basics of reactt? i am going to try to code along with him in that tutorial so i can learn some more do you think its a good idea?

[@shahemhaddad2717]

@@itsaaron6423 Did u?

[@itsaaron6423]

@@shahemhaddad2717 yea got a job this week

[@lionelsamain2348]

@@slipstream01 I was close to nowhere with React when I followed this. It's a lot to process though so maybe you should do a few tiny exercises to understand the very basics, then start with this. But whatever you do he explains everything he does so you'll be able to follow. But you might struggle to understand what you do. And if you don't understand, well you won't remember.

[@sefakose4600]

Great content!! Please keep releasing these kind of videos about best practices or dos and don'ts in React. It helps a lot! Thanks for good work!

[@johnsmith1789]

Your insight is pure gold Lama Dev! Thanks for sharing your knowledge & experience~

[@Corntrop]

Wow. I've been developing apps for months and I realized I didn't know 4 of them lol. Thanks for making us better developers. Please share other hooks too.

[@sarcasticdna]

++

[@alecssalecs8370]

Yes please ! Explain all the hooks, everybody needs a refresh and you are very good at explaining.

[@1306dk]

Great content as always. Ive been using your approach to handle forms ever since your last video about handling forms 👍

[@zakidzz]

where is that vedio of forms can you please put the link here?

[@1306dk]

@@zakidzz kzbin.info/www/bejne/qnrHf5ilfdOce7s this one

[@figgsboson]

hey, thank you so much for all your vids, especially on React hooks. I like that you make it simple to understand while maintaining content and the rationale behind it. Plus your voice and the way you speak is comforting haha, it helps with the stress of complex topics like this. thank you!

[@rafayzia4180]

Thank you for all this lama :) I learnt alot from you in the past year 🥳

[@feriduncanselen9047]

Hey Lama, I am going to start working tomorrow at my first software developer job. Thanks to your portfolio videos and other various videos I feel really confident for tomorrow. Thank you for uploading videos like this you are a life saver!

[@ferdinandeke9590]

And also, it would be lovely if we start using typescript in both our nodejs and react builds, that also will cut down a lot of these kind of errors. i don't know why no matter how much of tutorials i watch out there, i always still wait for you to implement such stacks before i really feel comfortable with them, cos your explanations sink so well in my brains at just a glance

[@John-mj1kk]

Not using TypeScript is just asking for trouble and endless nights.

[@bad_saurus]

Such an informative video! Many thanks for your tutorials. I've learnt from you a lot!

[@writegoodcode]

for the last one, you could wrap the find one in usememo and pass the dependency as id, to prevent calculating it again and again when you have a lot of states.

[@djbashan1662]

Nice tutorial, nice explanation of concepts. And before I forget,YES I want more videos on react hooks

[@MathaGaram]

What a refined explanation!!! .This guy knows the core issues that juniors unknowingly do.

[@mariusj8542]

Spot on! I feel like a fool for not understanding that we could define the whole model/object in the initial useState,I have used the standard && every time I use map.

[@xcrxwadda8287]

Please make more educational videos like this ... They are very helpful and everyone loves them would suggest a tutorial how to use product management tool like Trello

[@operupal]

Hello Lama, make please a video about useMemo, useCallback, useReducer)))

[@youusef101]

you forgot a "please" in there

[@operupal]

@@youusef101 corrected)

[@youusef101]

@@operupal thank you

[@terjeoseberg990]

@@operupal, The “please” should be before “make”.

[@abdullahbelkaid1684]

Woowwww i just started learning react last week and you gave me a bunch of informations with this video, thank you so much 💗💗

[@robertogonzalezz_]

Thank you for showing us the most common errors, you are very useful for us. ❤

[@jotasenator]

this is gold, thanks for your time doing this video, and thinking about the proper examples, i will share this on my linkedin. Wish you the best. thank you once more

[@jeffwang8660]

It is amazing. I saw another KZbinr recommended to use useState individually for each state, but I feel your suggestion of using them as an object is much better. I am interested in useReducer. Could you talk about it as well. Thanks!

[@raphaeljcm]

I've just found your channel, a lot of nice tips here. Thanks!

[@mayanksinghal5913]

Loved it brother, learning a lot ... Keep it up for us

[@FidelGuajardo]

I love the examples LamaDev uses. He really thinks beforehand about what code snippets are the best to explain concepts. He is a master teacher.

[@ferdinandeke9590]

great insights Lama, thanks. And yes please i would love to understand properly how the "useMemo" hooks and the likes of it used for performance optimization works, and how we could implement that to improve performance of our apps. thanks once more

[@morphine496]

I'd love to see useMemo and useReducer sometime, thanks for everything, you really help us a lot.

[@peacecoder]

We will more happy to see more such videos about react hooks and it's perfect use cases..❤️

[@zihadprogrammer4246]

This video is so helpful. Please create this type of videos more.

[@sajjadkazemi]

Your examples are the best way to explain 👍🏻

[@heguer87]

Amazing stuff. Thank you Lama!!!

[@muneess2979]

really great work.. keep it up.. expecting more videos like this... 🙏👏👏

[@mohammedaamirmansuri5131]

I was really helpful. Would love to watch more on useReducer hook

[@anshulsaxena3513]

yes definitely, please make a lecture on usereducer hook..... Thank you for this great tutorial sir, its kind one of the best and amazing

[@damanpreetsingh8549]

I love this you should make more videos like this

[@vlias500]

I do love your content man, best Lama teacher ever!)

[@Arabian_Epileptic]

Thanks Lama. I’m starting to love react. Use to love Vue most but now switched to react 💯

[@uu-jq4nc]

Well done Sir, an excellent example well executed. Thank you.

[@aamiramin6112]

Amazing very informative. Thanks for sharing

[@ldblogs4uofficial1849]

Please create this type of video again this really helps Reducer context react toolkits And all the unable to understand hooks Thank you sir

[@dr.science9609]

You are my teacher ❤️ if I reach success definitely I will mention you in all my success note And you will really present in my success note

[@oleksandrvoichyshyn7486]

This is amazing, refresh memory, and remind what was forgotten. I would watch video about another hooks, and that hooks (noob, pro)

[@chrisplacktor1992]

Great video 👍👏 Please go deeper into the useReducer usage next video

[@adriangora2415]

Hey, thanks for the interesting material. It would be nice to listen from you about useCallback/useReducer/useMemo, what's your opinion on reduce, are you trying to avoid due to the complexity of the code?

[@Etubom]

An absolute gem of an explainer video.Can't seem to find it in your github 2022 repo.

[@Andrew_Essam]

thank u so much that was super helpful and informative

[@andgoedu]

Dude thanks alot i literally ran into this problem on back4app , and this enabled me to assign multiple properties seamlessly and organized

[@andgoedu]

can i mention you in my tutorial as a reference ? for a better method than mine i am doing a typescript tutorial and this helped me out alot

[@cesarfranciscobueno435]

Thank you so much, i'm writting a code yesterday e thinking about how to write my code in a better way. There was a lot of States hahaha, so now today youtube show me your video and was what i need. You got a new subscribe.

[@ludwigvillalba1886]

Thanks for sharing, Lama,

[@boxboxboxboxbox]

Hi, may i know what editor you are using? I see the feature of multiple lines editing, that is amazing

[@norbertpascu6168]

Good video bro, good reminder for people going fast!

[@MikdanJey]

Great work, learning lot

[@hassaanshah9819]

Nice tutorial. Thank you

[@a.j.javier8119]

Very good video, sir. Keep it up!

[@alinesouza9297]

Great tips! Thank you

[@user-uw5dv5el8m]

Very nice explaination . This one video solved my many problems.

[@georgescuradu2275]

I’d love to watch a useReducer and context API tutorial from u. I watched the Redux one, but I personally believe context API is easier to understand.

[@mayanksinghal5913]

Very awesomely explained!

[@niX.99]

Thanks lama, this video give me a new knowledge

[@24capital75]

Great video lama dev can you please make a video on core differences between junior and senior dev

[@farid.dev1]

Safak you are the best! Thank you! Please make a Full Stack app with TypeScript.

[@blackstonejimmy]

I'd love a more in-depth look at the useState -> useReducer example you showed - this hook always confuses me (the docs say it should be obvious if I'm familiar with Redux... however I am not familiar with Redux). Same with useMemo and some of the more obscure hooks actually - but I might just be getting greedy asking for them... fantastic video either way!

[@kishoreandra]

Hey lama, great video as always 🙏... Can you show the useReducer e.g. that you have advised with form e.g. in video please... Thank you

[@codewithaaryan3489]

This is very helpful Thank you 🙂 And Can you make another video of Redux like this

[@chichebedarlington4360]

Thanks for the update, you are just as good as John Smilga❤️

[@bhosadraju5750]

Please make video on useReducer ...you are the greatest teacher i came across in my learning till now

[@emanuelameh5722]

Thanks Lama for this insightful video. Can you please do a video of how to use useEffect hook properly?

[@4BeerLife]

Please continue!

[@JoffeDall]

Please make this for the other hooks aswell, would be very useful

[@itexpert4193]

good job.. keep it up

[@okanozturk8604]

Güzel açıklayıcı bir video olmuş hemşerim.Eline sağlık.

[@MassHypnosis805]

Please do a reducer tutorial. This video was extremely helpful.

[@stefanhupp7945]

Really nice videos. Thanks 🤗

[@pouyamv9607]

I just love the way you teach

[@fizikodasi]

Hazırlamış olduğunuz videolardan çok faydalanıyorum. Teşekkür ederim. Reducer konusunda yapacağınınız videoyu sabırla bekliyorum.

[@otis3744]

love your work basically learned how to program from you... can we have typescript with react and ionic 😁 hopefully one day ill buy you a coffee to say thank you

[@micaeldie8584]

Great tutorial so precise, learn a lot if you can do some for useReducer it will be great. Much love from Côte d'ivoire 🇨🇮

[@Behind-The-Scenes]

You are a really great man.

[@rubenverster250]

Haha. Man this is so good making me remember all the Junior mistakes I made like this years ago XD

[@omersorhun4116]

You are great :) Çok iyi iş çıkartmışsın abim.

[@thesouthsidedev1812]

Thanks for this

[@kingsgaming7278]

Nice Work!!!

[@marcosMartinez-wm7bd]

great content! Please share other hooks too

[@jvidalnunes]

Very useful. Tks a lot. I made some of these mistakes. Now, no more :D

[@angelopavilando5967]

yo just saying. keep it up. learning new things from you always. 💓

[@mikhailvasilev5798]

In the 4 part of your video, you would add the changeUser handler once on the form tag.

[@tanmayjain5821]

I faced same issue yesterday and got its solution today while casually watching this video.

[@rohittewari6902]

Best video to understand useState and use it in the right way♥

[@synt-x6458]

Great tutorial. Would be great if you can do the same for the other hooks

[@user-dh4py6qj2h]

Thanks! It's great lesson! Yes, I'd like to see a useReducer :) I don't understand it...

[@jesustzinon]

Please do more videos about all hooks, like the useReducer!

[@viniciusm.m.7822]

Thanks a lot, bro!!!!! Deus abençoe você!!!

[@nick4bizz42]

Great insight

[@parmaryash4406]

Really amazing video

[@dravidjones8447]

Thank you!

[@ericsantoso1357]

hi, can you explain more deeper about how to handle complex input (section 5 : useState vs useReducer) and how to do another actions after category (select) changed if we used useReducer

[@nileshnilu7902]

Very useful thanks❤

[@marimuthur9456]

Your really awesome 😎 thank you so much ☺️👌🏼👌🏼👌🏼

[@yogeshdave2236]

Thank you so much.

[@kingsgaming7278]

Nice Work

[@welovephp]

Can you do a video about useReducer, maybe expanding the example in this video? That will be great.