I just spent 2 hours coding a complex form with Next.js and then, I watched your video, saw `formData` at 4:30, went back to my code and rewrote the from in 20 mins. Lessons of the story : 1) The React updates are really great ! 🚀🚀🚀 2) I should have watched your video earlier 😅😂
So well explained, thank you for summarizing this (and for all the clear illustrations that took time and effort). I need to watch this a couple more time even after trying to watch as much as I can of React Conf 2024;
Correction on 3:48 - “use server” does not tell react to run the code on the server exclusively. It is only used for creating server actions. “use server” won’t create a server component
@@TheCodeBootcamp Possibly yeah. I think the real issue is with react choosing those as the way of declaring 2 very different things. “Use client” is more confusing still when you use an SSR framework which is rendering ‘client’ components on the server. It’s fine once you understand it but I think it’s a big problem for beginners
Great. Now I have an excuse to tell LT to remove the code we added a few years ago to make our code performant to now make it more performant. Thanks React. Without you I wouldn’t be able to keep my job 😊
It's an unusual update from the React team. Until now, React was more like a rendering framework with hooks for adding logic. If you wanted form state for instance, you'd need to add it yourself or use a community lib. Now they are bringing their own solutions to some common use cases. I find it interesting.
I think they (rightfully) are seeing that React will eventually fall out of relevance if they don’t take some extra steps. The news of the Forget compiler is absolutely massive, and is alone one reason I would have eventually gotten fed up enough with react to switch to something else, if it never appeared.
React doesn't replace Next.js. Next.js is a framework built on top of React. With client-side actions in React 19, you can make a client-rendered React app with actions, so you don't need Next.js to use actions in particular. Directives are useful only if your components can run on the server or client (like in Next.js). Next.js still has a bunch of features you're still not going to get with a plain React project (data fetching tools, routing, image/font loading, etc)
I would learn React 18 first, especially since its still the stable version. React 19 doesn't replace many things. It's useful to understand why these changes were introduced.
"use server" and "use client" will be a mess! believe me. It's hard to reason about which part of the code is executed on the client or on the server, and confusion will introduce bugs and chaos.
I feel like Remix does a pretty good job at this. If you want your code to only be ran on the server just rename your file with a ".server.ts". If you want your code only ran on the client, then rename your file with a ".client.ts". A lot of these new React concepts and patterns actually look like they're taken from Remix
i’m not seeing an ergonomic way of handling error state within the form state or actions here. maybe i’m missing it, or it’s in the docs, but wrapping a component in an error boundary doesn’t feel like a good solution, since that can’t be contained to the component with the form logic (because the error will occur in that component, the error boundary must surround it). there are also aspects of forms that are hard to handle in a performant manner, like arrays of fields. maybe the new compiler handles that part though. but it still sounds like we need libraries like tanstack query to make error handling easy, and libraries like react-hook-form and zod to provide good validation
useOptimistic is nice. But what if, for example with chat, a user sends a few messages, will setState (set messages in the chat example) override all the optimistic values?
Im not a react dev, but I watched the video... I was wondering, does vuejs abstract a lot of things that makes it easier to use than react? It would be interesting an opinion of who know both.
@@TheCodeBootcampYeah I don't know why I've asked the question, I didn't read the docs properly... Btw, waiting for react 19 and moving towards RSC, it's better if I go greenfield, or I have that time and luxury to refactor client app towards server components, i will go with astro + qwik... I mean get all the performance u can get :)
@@TheCodeBootcampi didn't get this. When we run the application it's already running on the server right(locally)? So it means another server instance locally to have RSC support? I'm not sure how nextjs does this out of the box?
Hey, thank you for Uploading Videos again: I was currently building my Web App with your Full-Stack Saas App Video with Nextjs and SUpabase. Unfortunately you deleted it, can you reupload it, or has some1 downloaded it?
As a React framework, Next.js offers a bunch of features that React doesn't have out of the box. Routing, image/font optimization, SSR, etc. But features like these definitely make the default React experience nicer. Thanks for watching!
all of the server features require next.js until someone writes a different server runtime. the react docs literally refer to next.js when referring to these features
This video contains a factually wrong part. "use()" cannot be used to fetch data as described at 2:50. You can't use "use()" with promises created inside the component, because they are not stable references. The whole point of a generic "use()" hook is that unlike other hooks, the identity/persistence of the subscription is already provided by a stable reference. That's the way many state managers, including Recoil, works out dependency definitions inside atoms. You can simply reach out to the dependency through a subscription-based API. But if you put a fetch call in a use(), you'll always have a new promise reference, and it won't work.
There is a bug in your code on minute 2:42 , your internal function is called fetchPerson, yet in the useeffect you're calling getPerson(). Given that this is a BootCamp, I would assume this is helpful.
![Felix "Unfair" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/Oswujxm2Ag0/mqdefault.jpg)
This 7-minute video is worth way more than React 19 Conf video :)).
Really like the pacing, examples, and humor. Now we just need dark mode 🌙
I was going to say the same, thank you.
eww Light mode>>>>>>>
and a proper typeface...
@@be2wa agreed, really exceptional video killed by Comic Sans.
Really smooth pacing and topic jumps. Great job!
Another fantastic video! Your explanations are exceptional-clear and concise! I'm eagerly awaiting more content from you! Keep up the excellent work!
Good pace , and clear concept examples. These examples are way better then others .
You got one subscriber 👍
I just spent 2 hours coding a complex form with Next.js and then, I watched your video, saw `formData` at 4:30, went back to my code and rewrote the from in 20 mins.
Lessons of the story :
1) The React updates are really great ! 🚀🚀🚀
2) I should have watched your video earlier 😅😂
How about react-hook-form?
Cool video! Everything is clear, understandable and short. Thank you!
Wow, great overview. Thanks for this!
So well explained, thank you for summarizing this (and for all the clear illustrations that took time and effort). I need to watch this a couple more time even after trying to watch as much as I can of React Conf 2024;
Please make more of such videos. Fasterr! (Keep up the good work)
This is just a phenomenal video. Concise, simple and great examples.
This is amazing! Great explanation and great React updates coming.
i like the way you use animations to explain concepts, it makes comprehension so much effective
Thanks
Correction on 3:48 - “use server” does not tell react to run the code on the server exclusively. It is only used for creating server actions. “use server” won’t create a server component
Would have been better to say "To specify code (actions) you want to run on the server"
@@TheCodeBootcamp Possibly yeah. I think the real issue is with react choosing those as the way of declaring 2 very different things. “Use client” is more confusing still when you use an SSR framework which is rendering ‘client’ components on the server. It’s fine once you understand it but I think it’s a big problem for beginners
Amazing explanation 🔥 the visuals and examples really helped me understand the new features of React 19
Awesome explanation! Thanks a lot :)
We got a really useful video right here.
06:54 so we should render optimisticMessages instead of messages?
really love the way you teach pls make a full in-depth course for React with latest features 🙏
Thank you so much for this consice and straight to the point video!
Great. Now I have an excuse to tell LT to remove the code we added a few years ago to make our code performant to now make it more performant. Thanks React. Without you I wouldn’t be able to keep my job 😊
Many thanks for this great summary! 🙏
really really helpful & straightforward thanks alot
It's an unusual update from the React team. Until now, React was more like a rendering framework with hooks for adding logic. If you wanted form state for instance, you'd need to add it yourself or use a community lib. Now they are bringing their own solutions to some common use cases. I find it interesting.
I think they (rightfully) are seeing that React will eventually fall out of relevance if they don’t take some extra steps. The news of the Forget compiler is absolutely massive, and is alone one reason I would have eventually gotten fed up enough with react to switch to something else, if it never appeared.
the code and order of its working is a good idea.
Great video on these React's concepts 👏👏
Loving your work. RUclips is full of basic react app tutorials, but well explained content like this is much needed
4:13 - is that supposed to be action={myAction} ?
So by introducing both directives and actions, does that mean that React can replace Next.js (or that Next.js isn't necessary anymore)?
It's all a mess i moved over to VUE
React doesn't replace Next.js. Next.js is a framework built on top of React.
With client-side actions in React 19, you can make a client-rendered React app with actions, so you don't need Next.js to use actions in particular.
Directives are useful only if your components can run on the server or client (like in Next.js). Next.js still has a bunch of features you're still not going to get with a plain React project (data fetching tools, routing, image/font loading, etc)
Full circle to PHP era.
same impression here since i heard about nextjs… the new stuff is the re-invented old stuff, they cant change it…
Butt with JavaScript we have constant DX for both backend and frontend while in PHP u still need a JavaScript if u need interactivity@@anonimous__ho
for beginners should I learn react 19 or older version as most websites use older react version and react 19 has a lot of changes
I would learn React 18 first, especially since its still the stable version. React 19 doesn't replace many things. It's useful to understand why these changes were introduced.
wait is the "use client" and "use server" basically available in react now without a full stack framework?!
apparently.
that 'subscribe bro plz' at the bottom right got me rolling. subbed haha
"use server" and "use client" will be a mess! believe me. It's hard to reason about which part of the code is executed on the client or on the server, and confusion will introduce bugs and chaos.
Been doing this for 2 years in Nextjs lol
@@sowmocoding5740same, and it's a mess lol
I feel like Remix does a pretty good job at this. If you want your code to only be ran on the server just rename your file with a ".server.ts". If you want your code only ran on the client, then rename your file with a ".client.ts".
A lot of these new React concepts and patterns actually look like they're taken from Remix
source: believe me.
There is so many things that when not used properly can introduce bugs and that doesn't make them less powerful when used properly
i've been using for a while
This is gold, very well structured and all the animations helps to get the idea quickly!
Thanks for share 🫡
Thanks god, I was never comfortable working with those optimization elements.
It makes me feel like a React developer.... which I'm not. Great content !
With " use server" for server side rendering. Do we even need next js anymore?
Next is so much more than that.. this is actually kinda new in nextjs
React compiler is independent of React 19 release. So React Compiler may come with 19 or may not
Great work! Small correction though "use" is not a hook, its an api
i’m not seeing an ergonomic way of handling error state within the form state or actions here. maybe i’m missing it, or it’s in the docs, but wrapping a component in an error boundary doesn’t feel like a good solution, since that can’t be contained to the component with the form logic (because the error will occur in that component, the error boundary must surround it). there are also aspects of forms that are hard to handle in a performant manner, like arrays of fields. maybe the new compiler handles that part though. but it still sounds like we need libraries like tanstack query to make error handling easy, and libraries like react-hook-form and zod to provide good validation
I bet better patterns will emerge once 19 becomes a stable release
Amazing video! Where do you do such code animations for video?
useOptimistic is nice. But what if, for example with chat, a user sends a few messages, will setState (set messages in the chat example) override all the optimistic values?
Great video! Keep up the good work, mate.
whoa this is very nice and easy to understand ... can you kindly make on fetching and sending data to the backend in react ether with fetch() or axios
After 6 months of programming burnout break looks like Im returning in the right time
This is really great explanation 👍
Can you keep video background dark? My eyes hurt in light mode.
Very helpful. Thanks
"use server" is not to run react component on the server. It is to create instant endpoint and run javascript code in the server.
"use server" can be used at the module or function level. You're right that it's primarily used for marking server actions.
Your subscribe picture is funny af
You got a subscribe from me 😂
Im not a react dev, but I watched the video... I was wondering, does vuejs abstract a lot of things that makes it easier to use than react?
It would be interesting an opinion of who know both.
Good editing and explanation!
Does React 19 will support server components out of the box, or u need some minimal server to support RSC?
You need a server. That's why most people use Next.js (with app router) right now.
@@TheCodeBootcampYeah I don't know why I've asked the question, I didn't read the docs properly...
Btw, waiting for react 19 and moving towards RSC, it's better if I go greenfield, or I have that time and luxury to refactor client app towards server components, i will go with astro + qwik... I mean get all the performance u can get :)
@@TheCodeBootcampi didn't get this. When we run the application it's already running on the server right(locally)?
So it means another server instance locally to have RSC support?
I'm not sure how nextjs does this out of the box?
That was very helpful ❤,thank you very much ,could you please make a tutorial for react redux and redux toolkit ?
Clear explain, thanks!
Can anybody share your experience of his bootcamp!?
Hey, thank you for Uploading Videos again: I was currently building my Web App with your Full-Stack Saas App Video with Nextjs and SUpabase. Unfortunately you deleted it, can you reupload it, or has some1 downloaded it?
Thank you for explaining
Happy that React added those features which means no more NextJS. Vercel is almost killing React
As a React framework, Next.js offers a bunch of features that React doesn't have out of the box. Routing, image/font optimization, SSR, etc. But features like these definitely make the default React experience nicer. Thanks for watching!
@@TheCodeBootcamp Thanks for your HQ content man!
all of the server features require next.js until someone writes a different server runtime. the react docs literally refer to next.js when referring to these features
React is learning from Svelte
Can we download this slider ?
Awesome.
(Subscribed!)
React is the Apple of Javascript frameworks: "look, everybody, we build a compiler"
Could you please create a video on JavaScript Data Structures and Algorithms
The compiler will not be part auf react 19, maybe as a separatate bable plugin.
At 6:36, I checked my Discord. You might too.
This is really useful
4:11 myAction!=formAction
Typo
Great video thanks.
literally the best one
This video contains a factually wrong part. "use()" cannot be used to fetch data as described at 2:50. You can't use "use()" with promises created inside the component, because they are not stable references. The whole point of a generic "use()" hook is that unlike other hooks, the identity/persistence of the subscription is already provided by a stable reference. That's the way many state managers, including Recoil, works out dependency definitions inside atoms. You can simply reach out to the dependency through a subscription-based API. But if you put a fetch call in a use(), you'll always have a new promise reference, and it won't work.
'useFormState' is already going to be replaced by useActionState, which returns errorMessage, action, and isPending state.
Wow react is becoming solid. Ryan was right
Please explain about javascript and mern stack topics
React 19 = Next 14, that's all there is to it
Best explanation
Great video. I am not sure if what you explained for Context and "use server" is 100% accurate but again, great video.
Seems like they're taking a lot of inspiration from Svelte with this update. I'm all for it.
Experiencing technology change for the first time in my life
Create one on flutter
Angular please
The form stuff looks like trying to “use the platform” and the asynchronous stuff looks tanstack query
React is slowly becoming Nextjs because of new actions feature
Cant get the idea of useOptimistic
Very nice ❤❤
There is a bug in your code on minute 2:42 , your internal function is called fetchPerson, yet in the useeffect you're calling getPerson(). Given that this is a BootCamp, I would assume this is helpful.
So good videos!!
I am new in react can you make a project video which is help to improve react concept 😊😊😊
That was good!
Wow this svelte 5 release looks promising
so after 19 versions, react accepts angular's way was the right one.
Please make more comprehensive videos with examples.
What would you like to see?
@@TheCodeBootcamp i mean to say please make more comprehensive videos explaning topics thats it.
waiting for useUse hook in react 20
react became almost like vue 5 years ago 🎉
This would destroy our whole app. Omg
reed bager is that you ?
Still not a framework, guys, just a tiny small library!
Your videos are good but to grasp the new concept, you need to slow down or make multiple short videos.
They should've done this years ago
cool video
Memoization alwayes seemed to me just a headeache when writing react code, In fact, I never even give them I try 😂. Who feels the same?
Great