React State Management - Intermediate JavaScript Course
ฝัง
- เผยแพร่เมื่อ 1 มิ.ย. 2024
- React State Management is half of your React app so it is important for React developers to understand. In this full intermediate React tutorial, you will learn how to implement state management using industry best practices.
✏️ Jack Herrington created this course. He is a principal full stack engineer. Check out his channel: / @jherr
💻 Code!: github.com/jherr/fcc-state
⌨️ (0:00:00) Introduction
⌨️ (0:03:27) useState
⌨️ (0:18:37) useReducer
⌨️ (0:32:29) useMemo & useCallback
⌨️ (0:49:43) useEffect
⌨️ (1:05:59) useRef
⌨️ (1:13:53) Context and Custom Hooks
⌨️ (1:41:48) React Query & React Location
⌨️ (1:57:26) Zustand
⌨️ (2:06:11) Valtio
⌨️ (2:12:44) Jotai
⌨️ (2:20:51) Redux
⌨️ (2:37:56) The new use hook
⌨️ (2:44:26) Recommendations
⌨️ (2:46:07) Outroduction
🎉 Thanks to our Champion and Sponsor supporters:
👾 Nattira Maneerat
👾 Heather Wcislo
👾 Serhiy Kalinets
👾 Erdeniz Unvan
👾 Justin Hual
👾 Agustín Kussrow
👾 Otis Morgan
--
Learn to code for free and get a developer job: www.freecodecamp.org
Read hundreds of articles on programming: freecodecamp.org/news
![[TH] VCT Masters Shanghai Playoffs DAY 2 // PRX vs G2 | EDG vs TH](http://i.ytimg.com/vi/T5j2XVcDFs0/mqdefault.jpg)
Despite React's popularity it's so hard to find proper intermediate to advanced explanations about the nuances of the library. Seems like most React developers just copy paste and adjust code until they get the desired outcome. It's for this reason that I love Jack for his contribution to the tutorial landscape.
I feel the same way.
You are right, Jack, Theo & some other dudes help with more advanced / senior things, rather than typical todo lists and stuff
yeah same here lol
I'm guilty
Samee ❤
I don’t think I’ve ever commented on a TH-cam video, but Jack Herrington is one of the best teachers I’ve seen on the channel. Thank you, Jack. Thank you for a fun time learning state in React!
This instructor is really skilled at explaining in just enough detail, good choice!
This was one of the most comprehensive tutorials I've watched,. I really like how you gave examples of why the state doesn't change when discussing useState.
This is a really great mini course. Loved it! I went and followed Jack's channel as well! Thanks for putting this together.
I learnt more about useState in 20 mins explained here than in a whole term of web development diploma from conventional education.
I am so thankful to value-oriented YT channels like this one, are free sources of knowledge and value to everyone at the cost of an internet connection.
Thank you for delivering this content about React
I just posted a video about the same topic (in 2023) - maybe this could be interesting for you as well. 😉
Agreed! I no longer want to learn from conventional education! They set a time frame and just throw everything to you and expect you to know and they considered their job done!
Jack is actually one of few rare guys that covers and teaches you intermediate topics about react/next and typescript on his channel.
One thing that I also like for him is that he with all that knowledge, you hear from the voice that he is still on to ground without any ego-trips, he is there to only teach you and transfer a knowledge.
Good job Sensei!
Thank you!
I agree !
@@thebattinson1278 true
I learnt HTML and CSS from your channel from scratch and now I am posting my own web dev content! Thank you for your work :)
wow, this is actually super important and it was so hard to actually find something that covers these concepts so well. thank you!
Best tutorial. This is so helpful. Words cannot explain how grateful I am to have access to invaluable educational material like this.
This is the most important video about React I have ever seen in over 3 years of using React. Thank you!
This is seriously such a great instructor!
Awesome tutorial.
The only thing missing of the useState video is the classic example with 3 consecutive setCount functions that add 1 but the user get 1 again as a result.
Then you teach about previous state!
Awesome resource man, Thank you for not just explaining how state management works but how the underlying data structure is handled by JS for example by reference and by value.
This man is the reason I went from junior to medior. You seriously must watch his videos if you're serious about a career with React.
It's Incredible! Got the actual understanding of state management from this. Kudos to Jack!
easily the best react video and the best teacher. thank you for doing this !
Jack is maybe the best intermediate content creator. Glad to see him here!
Jack, You are AWESOME!!!! I think this tutorial was by far better than other react and state management's videos I've seen so far. Thanks for sharing your incredible knowledge.
I just posted a video about the same topic (in 2023) - maybe this could be interesting for you as well. 😉
your always great ,right time providing right course for the subscriber .thanks for the educator
I have been learning react since months but this video just hit different! Jack is so amazing! Only after watching this video did I truly understood stage management!
Thank you sir. Your useEffect video was very informative. i learned the why along with the how
Highly instructive, thank you. 18 minutes in, I can't wait to watch the rest
Thank you very much for this course, I think you explain the best among the lecturers.
Alright... 7 minutes in and I can already tell this is a good video. So many "tutorials" gloss over the nuances of lines of code and this tutorial doesn't. This tutorial also goes a step further by showing code that you would think would work, but actually doesn't and explains why. For me, I need this. I need to know why something is happening, because under-the-hood/behind-the-scenes magic never works for me in the long run.
Thanks for this, it's really worth the time I have put into it.
Jack is a monument and I'm so glad to see him here on FCC ❤
Great refresher , Yet learnt some new things.
this is really well explained. thank you
Fantastic tutorial!! Thank you.
Jack is the best talking about React and Next 🔥🔥
I'm interested to know how to create this with TypeScript.
Excellent tutorial.
I will spend the next couple of days to build alongside.
Next make a Advanced React course. it will help me greatly in my job. Thank you for all the awesome content.
Jack is great. Do whatever he tells you to do. You will thank him later.
Best of the Best, ty Mr.Herrington a lot. You are really awesome
This is really and awesome video. Many thanks for this!
I did a hit on like button, when i was at 17:11 ( setLIst( [...list, name ] ) ). Thank you so much master, for this vauable source
Great course, Just one correction In useRef section if we do "useState([{id: idRef.current++ , name:"john"} , {id: idRef.current++, name: "Jane"} ])" then upon every re-render idRef value gets updated two times, that maybe because of the development mode which follows "mount unmount and then again mount lifecycle". Note: "On second entry you will get the id 8 instead of 4"
Thanks bro I was thinking about this
just found that out yesterday and commented. one better just set the numbers in the useState initial values.
Thank you, that's a very nice video!
A master piece!! The vscode configurations is from another planet 🤯 Can you share please
console ninja
Loved the squirrel raiding the bird feeder in the start of the video 😂
best 2:46 of the day! thanks for sharing!
I've been using React for about a year and a half, but I think I got 50% better at React by just watching this course.
Hello Jack. Thank you for your time and effort to help improve our skills. Question: I have modified your code slightly where I am importing an array of names instead of hard coding it in the components. I am running into a slight problem where I cannot add a coma and space between the names from the array. how can I add this minor detail? Thank you for your time!
This might be the last state management video one needs to watch for a long time, until they hit any limitations (which I dont think they will for a long time!)
45 minutes watched BTW what a great Tutorial !!! awesome
This man is just amazing !!!
I am on 1:13:40 and I was following along and everything was going fine but then the tutor switched to Typescript and starts teaching in it If they wanted to teach in Typescript they should sticked to it since the beginning or they should have notified that things will be taught in TS later in this course as a person who has no knowledge in TS now i have to learn it then i have come back to this course and resume this course it will just waste the time, for those who don't know TS
Masterpiece!
Hey Jack !
Awesome video man. Clear all the fundamentals in one shot. Can you let me know what VS Code extension you are using, that seems to be doing wonders as well.
Quokka.js is the one you are amazed by I guess. Or possibly, console-ninja
did you get the answer dude? let me know if you did.
for auto complete? I think its Tabnine extensions
@@Ujedkemal for auto complete? I think its Tabnine extensions
I already know this will be epic..
Jack's a legend. Thanks for the pokeymon man.
this is absolute gold
One of the greate video. 🤩🤩
you are the master of javascript
You know it's going to be a good React tutorial when the instructor doesn't use CRA
Donald Trump is back to "Make React State Management Great Again"
Bhut Hard 😂👍🏻
Sur 😹
great united STATES again!
🤮
It's gonna be huuuuggggeee!!!
This is actually gold
Excellent teacher!!!!
would love to see a tutorial about swr in terms of state management, and maybe compare it to react query
Hey @jherr, this video is really incredible! Great job!
Any idea why Beedrill is the first Pokemon on the useContext results at 1:40:22, but not on the Jotai results at 2:18:51? Is it because you sliced a different amount?
I really like the atomic model. I'm gonna have to try Jotai out.
because it slices before sorting
shoud slice after sorting
Jack, please what's your font and your VSCode theme?
thank you for the amazing tutorial
im forever using use reducer for my forms
Great vid!
1:13:36 Jack, it gives an error as it is, useRef: it runs ok with values like 1, 2, 3... but then it comes obvious that the ++ increments in the useState are fired every time and the count increases by 5, if in strict mode, or by 3, if you comment out 'strict' mode., so what one can do is to assign numbers: id 1 and id 2 for John and Jane, and start the count with 3. (or 2 and pre-increment the id)
Thanks for this!
Thanks for this,but i don't understand reason behind this ,is it because setting useState which lead to render this it results in increamenting refId more times?
Superb course
Awesome.. Tutorial Jack... purely delighted... Thank you so much!!! Do you mind telling me what is the theme that you used in visual studio code... really liked it and how all keywords are italic... please help me on this
Will keep this video for future reference. Thank you freecodecamp and jack. I just wish recoil was part of this video.
Jotai is, and that is very close and IMHO better.
@@jherrsir if you vouch for it, I will definitely definitely look into it.
Best instructor
Thank you very much Sir.
Thanks for the great video Jack! Regarding useReducer, the current React 18 docs examples declare the reducer function *outside* the component body. Besides reusability, is there any reason to do it this way as opposed to declaring the reducer *inside* the component?
awesome video, does anyone knows what extension he uses for shortcuts in react (or more in general what do you guys would suggest?)
High quality intermediate to advanced React contect
My eye just pop open. Jack thanks
Hello, I love your videos about kivy)) I have a question: I will develop a mobile app and upload it to the Google Play. What do you think, can I use kivy or it is better to use java?
Thank you)
Cca 17:30
Why not using the "prevState" for updating the array?
Could you record a video about eventrix? It’s a new open source alternative for redux that our company created and we want to share our work with the world :)
what extensions are you using? how can you run typescript file apart from others (when you open typescript workbook 19:30) - how does the VSCode shows the result in front of the code?
That's Quokka.
Good explanations, can anyone provide some advice about project structure/folders when building medium sized app using hooks for local state and context or maybe zustand for global state ? some boilerplate repo would be appreciated too
Hi, Thank you for your awesome video....what is your extension to complete code in react
Jack is awesome, very knowledgeable and insightful! Nevertheless, I got a few questions:
1. Example with Pokemon context used setSearch function inside a hook. Isn't it a good way to move such functions outside of a hook, changing its signature to expect dispatch as a parameter? As a benefit of this approach you'd make setSearch treeshakable, and wouldn't ship dead code in case a consumer doesn't even need it.
2. Regarding the zustand example... Your setAllPokemon function derives new state based on search criteria and a list of pokemons. The question is why do you prefer keep derived state in a store, and call filtering-sorting function two times in a store, instead of inversion the responsibility to filter sort pokemons IF it is needed to the consumer of the store. As far as I understand you could provide a selector for this purpose, aren't you? (i'm not sure since I haven't used zustand and frankly rarely use react). Btw this separation of concerns is what I liked when you showed vatio.
3. This one is more of a wish than of a question) I would really love to see you explaining the example with simple rxjs state management approach. I guess it would be kinda in a family of atomic state management, but light light weight, isn't it?
And I also wondering about having a good analysis of pros and cons of those state managers compared to each other)
"How coooool is thaaat?" :D
you always surprise me with the super white bg.
Forgive me for not knowing exactly how to ask this but what is the tool used for the suggested autocomplete when coding?
Thank you sir ❤🙏
What is the name of the extension you use to auto fill specific lines? Thanks!
GitHub Copilot
Nice tutorrial, my only question is why Arcanine is not the first as it starts with A?
Does anybody know what Jack is using that gives prompts when he starts typing? For example, for reduce function syntax at 33min.11sec? What VS extension is it?
whats the extension he used? like when we want to type onClick function, the extension could show up the recomendation tag and symbol for typing the function.
Thanks!
Can someone explain to me what Jack does around the 31 minute mark with the {...state, ...action}. I understand the spread operator syntax, I just can't wrap my head around how this works with a more complex state. Like if I had an array of people with first & last name, how would this shortened reducer function know which values to change? I've spent an hour+ trying to work this out.
on 28:35 wouldn't it be better to use forEach instead of map? Since map creates a new array which is not necessary here
Just after watching 15 mins, my mind be like 🤯😮💨 (how a man can make us to understand something into this level)
@AKSHAY sorry I didn't get you..
As well as I am from south India, so I didn't understand Hindi in code with harry videos
@AKSHAY hey by the way, do you know any best react native course.. 😁
I am getting duplicate keys error in the useState segment. I wish he'd have explained the reason for introducing that prop rather than just add it as if serves seome necessary functionality. It breaks the app. Also, even after calling a blank string on setName, the input field still doesn't refresh.
I like the second implementation of useReducer hook but when I'm going to try with Typescript , I couldn't manage to implement. Is that my problem or is it possible to implement with Typescript ?
Pass by value vs pass by reference in terms of state, no one ever mentioned this in any video or blog tutorial I saw in my whole life.
I like your teaching technic
The shift to Typescript at 1:13:53 significantly impairs the rest of the video. The noise of all that Typescript junk obfuscates the material I'm trying to absorb. I apparently have to go elsewhere to learn how to use "useContext", "createContext" and custom hooks in Javascript.
Nice course
what nice place jack has to work, in the middle of the woods. I'd like have some place like that.