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Ryan Toronto
Приєднався 16 лют 2010
React 19: useActionState
In this video, we'll build a form using React's new useActionState hook, introduced in React 19. Along the way, we'll explore other exciting features from React 19, including form actions, server functions, and server components. Learn how these tools make building forms easier than ever!
One thing I forgot to mention: useActionState can only be used inside client components. That's why we have a separate registration form component - it's a client component, but I forgot to show/explain that in the video.
Black Friday Sale: buildui.com
- 0:00 - Intro
- 0:25 - Actions and server functions
- 5:09 - Returning data to the browser
- 7:21 - Use action state
- 12:21 - Adding feedback to the form
- 14:53 - Actions and transitions
- 19:48 - Updating existing records
- 26:23 - Using cookies
- 32:06 - Why do we need a new hook?
One thing I forgot to mention: useActionState can only be used inside client components. That's why we have a separate registration form component - it's a client component, but I forgot to show/explain that in the video.
Black Friday Sale: buildui.com
- 0:00 - Intro
- 0:25 - Actions and server functions
- 5:09 - Returning data to the browser
- 7:21 - Use action state
- 12:21 - Adding feedback to the form
- 14:53 - Actions and transitions
- 19:48 - Updating existing records
- 26:23 - Using cookies
- 32:06 - Why do we need a new hook?
Переглядів: 688
Відео
Handling RSC Errors in Next.js
Переглядів 2,9 тис.7 місяців тому
In today's video we'll use an error boundary to refresh a React Server Component that threw an error. We'll also dive into transitions and see how they allow us to batch together state updates that finish at different times. - 0:00 - Intro - 1:06 - Error handling in Next.js - 2:11 - Resetting without fixing the error - 3:16 - Rerunning the server component - 4:23 - Avoiding race conditions with...
Where should this component run?
Переглядів 1,8 тис.8 місяців тому
I love how the RSC architecture approaches bundling and running React components. Non-interactive components run on the server, keeping the initial load fast and the bundle size small. Meanwhile, interactive components are run on the client, making the UI feel snappy and instantaneous. But what about components that need to run on both the server and client? How does the RSC architecture addres...
Asset loading in React
Переглядів 2 тис.9 місяців тому
In this video we’re going to take a look at the new Asset Loading feature coming to React 19. - 0:00 - Intro - 0:40 - Flash of unstyled content - 1:46 - Asset loading in React - 4:13 - Books app - 6:40 - The bookshelf component - 7:18 - How the transition works - 9:12 - Stylesheets do not unload Source code for books app: github.com/ryanto/asset-loading-suspense Check out my website: buildui.com
Out-of-order streaming in React
Переглядів 7 тис.9 місяців тому
Wish your users could see content instantly, even if data takes a second? In this video we're going to learn how out-of-order streaming allows React Server Components to render independently, showing your UI as soon as possible! - 0:00 - Intro - 0:15 - Introduction to streaming - 2:14 - Out-of-order streaming - 4:29 - Streaming and Suspense - 8:04 - Streaming multiple components - 9:41 - UI ide...
Preloading data (React's cache part 2)
Переглядів 1,6 тис.10 місяців тому
In this video we're going to continue where we left off in part 1 and use React's cache function to preload data. Watch part 1 here: ua-cam.com/video/MxjCLqdk4G4/v-deo.html - 0:00 - Intro - 0:23 - Fetching data for the page - 4:15 - Why is the page slow? - 6:35 - Using cache to avoid waterfalls - 8:47 - Is preloading unused data okay? My website: buildui.com
React's new cache function
Переглядів 11 тис.10 місяців тому
In this video we're going to look at how React's cache function helps avoid unnecessary data requests. - 0:00 - Intro - 0:34 - Loading the current user - 2:31 - Using React’s cache function - 4:06 - Why not use props? - 7:51 - Good things to know about cache Preloading data with cache: ua-cam.com/video/_gZ3ctkbGPo/v-deo.html Check out my course "Data fetching with React Server Components" here:...
Why you can't set cookies in Server Components
Переглядів 11 тис.10 місяців тому
Today we're going look at why you can't set cookies when rendering server components in Next.js. - 0:00 - Intro - 1:22 - Setting cookies in RSC - 2:43 - Suspense - 5:13 - Streaming - 6:55 - Anatomy of an HTTP request - 9:22 - Setting cookies in Next.js For more videos on React check out buildui.com/
The useTransition hook
Переглядів 1,6 тис.Рік тому
Hi everyone! I wanted to share a free lesson on the useTransition hook from my course "Data fetching with React Server Components". - 0:00 - Intro - 0:23 - Start of lesson - 0:46 - useTransition hook - 2:22 - Styling the searching UI - 3:24 - Lesson outro - 3:56 - Outro Join Build UI: buildui.com/pricing Course: buildui.com/courses/react-server-components
Refresh React Server Components
Переглядів 4,9 тис.Рік тому
In this video I'm going to show you how to automatically refresh a Next.js app whenever data in an external system changes. Code: buildui.com/recipes/refresh-app-router-cache-server-action - 0:00 - Intro - 1:23 - Server action - 4:18 - Refresh component - 6:49 - Interval with focus event - 9:47 - Outro Check out my latest course "Data fetching with React Server Components" exclusively on Build ...
Why I use Zod with Server Actions
Переглядів 13 тис.Рік тому
In this video we're going to take a look at how Zod makes FormData easy to work with! Check out my Build UI course on React Server Components: buildui.com/courses/react-server-components - 0:00 - Intro - 0:23 - Introduction to Server Actions - 2:58 - Problems with FormData and TypeScript - 6:14 - Introduction to Zod - 10:17 - Dealing with Checkboxes - 12:35 - Code cleanup - 13:42 - Summary - 14...
Query params with TypeScript
Переглядів 3,1 тис.Рік тому
In this video we're going to use TypeScript to recreate the type for query parameters.
Next.js Deploy Notifications
Переглядів 7 тис.2 роки тому
In this video we're going to build a simple version of the next-deploy-notifications library from scratch. Next deploy notifications: github.com/ryanto/next-deploy-notifications
Transitions that Suspend - React 18
Переглядів 3,1 тис.2 роки тому
Today we're going to take a look at the useTransition hook that's new in React 18. Source code: github.com/ryanto/suspense-transitions
Refactoring from useState to useReducer
Переглядів 8972 роки тому
Today we're going to refactor a database app from useState to useReducer. Source: github.com/ryanto/use-state-vs-use-reducer
Customizing Complex React Components
Переглядів 3,2 тис.4 роки тому
Customizing Complex React Components
All good ! but I have one doubt if I need to set the cookie not after the app initialisation(middleware) but rather after a function(server action) works, for example user authentication setting tokens , traditionally the cookies has to be set after the storage of user details in the database, So uh how to implement this particular method, any solutions
Great question! You can totally set a cookie in a server action! Once you write data to the database call cookies().set right inside the action. It should just work :)
@RyanToronto will try it out
Why can't you send cookies on the initial page serve? Since you are sure that no additional streaming is happening for the initial HTML?
That's a great question. You technically could, but if your code ever got moved inside of a Suspense boundary then it would all of a sudden stop working. So Next takes a hard line about setting cookies during render.
@@RyanToronto Thanks for the reply, yeah I am not a big fan of setting the cookies on the middleware only since it runs on every route. In this case I have token refreshing logic when entering some private routes implemented, so it would be nice to do this on the initial page render. Currently have no choice but to place it on the middleware.
thanks
Awsome
Thank you for this video❤
Hi, great video! Have you considered to cover the new React Router 7 release on the podcast with Sam? How does it compare to Next.js now that next has finally a great competitor..
Thanks Luis! I still need to give RR7 a try, I haven't used it yet. Are you planning to use it? Would love to hear your thoughts
Your teaching style clicks so much for me, even though these are more complicated topics. It is calm, organized (with a clear, step-by-step path) and you're answering questions while they pop in my head. Thank you!
Wow, thank you! Appreciate the kind words
HI Ryan awesome video makes sense thanks for taking the time to create this. Would love to see the extra video to add the photo 🙂 could you possibly include how you can integrate RHF to this?
Thank you! I'm not a RHF expert, but that's a great question. I think by the time React 19 gets released they will have an answer for React 19+RHF.
@@RyanToronto hey no worries, hopefully something will come out for it. In any case keep up the great work always a pleasure to watch these videos!
Thank you! We need more videos Ryan!
More to come! Thank you!
Please not only do the photo example but talk more about transitions. Like I said before, you and Sam are the best, thankfully I bought lifetime subscription to buildui.
Thank you and thanks for joining Build UI, we really appreciate it! More on transitions is a great idea, I'll see if I can find some good examples to make videos on that.
I've always been interested with Transitions. The sad part is, react official docs have docs on useTransition etc. but not one page defines what are transitions and what all APIs support them.
Ya, totally. I think once 19 gets released we'll see more people sharing blog posts and code examples around transitions. Fwiw, I found the usage section of the docs to be helpful: 19.react.dev/reference/react/useTransition#usage, but I think I'm the type of person that learns best by playing with things, so the usage examples might not be for everyone.
thank you Ryan, and yes we want more :)
Hi, how can i revalidate a react cache function
Hey there! This cache is very short lived, it only lasts for the life cycle of the request so there's no invalidation.
The best 🔥. Need more
Thanks Nikhil!
36 minute video, would love to see more long form content from you
Thanks!
Awesome insight. This just saved me a huge stress of tinkering around.
Thank you
Great 🔥
Ryan please help me i am submitting a form with server action i am setting cookies from middleware.ts they were setting correctly but i don't know why my client components get resets with default value and when submit my form again it works normally
This video helped me a ton
Very nice video, works, but i have a different problem i am facing, i have a dashboard, data are updated every 5 minute by a backend microservice, when this background process on the server finishes, it does call revalidate using webhook on the nextjs app. my problem is I am calling router.refresh() (lets say every minute), the pages does not refresh, its still using stale version,, and I am hopeless, i tried so many approches, obviusly, your works, but it triggers re-render server componnets by every user connected. thanks
Hey sorry for the late rely. Are using revalidatePath in the webhook? I'd start there. The next caching is really tricky and hard to get right, especially for big apps.
@@RyanToronto yes, I was, but i found a problem, my app was deployed on GCP and the default setting is to CACHE 1h .... so thats why it was all wiered.
@@PeterJanickovic Ah that's good to know! Glad you got it fixed
Thank you Ryan, I really appreciate the calm and clear manner with which you teach! I am newer to Zod and I decided instead of fumbling with the API, I'd find some videos to help me understand it from first principles. This definitely helped!
Great to hear!
Damn. Thanks for this video. I have been trying to wrap my head around almost the exact same problem for days now. This pattern opens up a lot of new opportunities. I am actually pumped now 😀 Didn't see your channel before, but just left a sub. This one was dope. Thanks man, keep it up 👌
Thank you!
FYI you don't even need javascript, you can use webcomponents/slots to achieve the same thing. No client side JS needed.
Nice. The slot element looks very cool
Very interesting. It is done through long lived http connection or websockets behind the scenes?
It's a single http connection. In fact, it's the same connection that renders the first html you see... so I guess its a bit like long polling. As soon as all suspense boundaries are resolved the connection closes.
Very good video thank you!
But middleware is invoked for everyone request made from browser. Do we want to cookie-setting-logic to run on every request?
Check out the matching paths section of the Next.js docs to control which paths middleware should run on: nextjs.org/docs/app/building-your-application/routing/middleware#matching-paths
Gonna see if this can work for videos
That is such an awful reason why I cannot set cookies in the page server component. Why can I not set it before calling any Suspense? This solves the issue. And only if you using Suspense then I cannot set any cookies
I believe the reasoning is that if you ever refactor your page into one that uses suspense all the cookie code would then break. Middleware is a recommended way to do it from Next.js.
A very great video. One issue I have faced and wish to understand, what about setting the expiry time for that cookie, lets say a userToke, which is essential so when it expires it can be cleared. Hope the question makes sense. Hoping to hear from you soon
Great question! You can use the `maxAge` or `expires` option from Next's cookies().set function. See more details here: nextjs.org/docs/app/api-reference/functions/cookies#options
How to get cookies from browser in server component/server actions so we can send the cookies with request to backend API request. Please 🙏 reply I'm not able to find any solution
cookies().get('name') should allow your server component to get cookies from the incoming browser request.
Really nice, didn't know that and really useful.
Thanks you! Glad you enjoyed it
This was very enlightening. Another place to set cookies is in route handlers!
You can use my RSC philosophy whenever you have mutable data to handle you should have client components otherwise for immutable data you should use server components
interesting way to summarize it! thanks!
What to do in a case when the user clicks on a route "/throws-sometimes" that's included in navbar? Can the error be reset via clicking on a link to the route within navbar? e.g. <Link href="/throws-sometimes">Throws sometimes</Link>
I haven't tried it, but I wonder if it just works? If not, my first thought was you'd have to somehow get the reset into the nav bar so the error could be dismissed. Let me know what you come up with, I'd be very interested to know how you went about solving this type of problem.
@@RyanToronto Yeah, it's not working. I gonna try, if I'll make it I'll let you know :) Thanks
Can it work with aaync functions
In the upcoming React 19 release there will be support for transitions to take an async function. Right now they are calling these "async transitions". Hope that answers your question!
@@RyanToronto I have been using them with server actions from next especially the isPending, I don't know if it is really a good idea since most server actions are asynchronous
@@emmanuelxs6143 Oh yah with Next.js you can absolutely use async transitions
@@RyanToronto thanks for the update, I appreciate
You voice. Masallah ❤
bruh godly content
Awesome! But, why is this cache function in the React package, and not some Next package, especially if "vanilla" react doesn't even use it?
Great question! Cache is in the main react package because it's useful for any React Server Component to use.
Nice . Thank You! I'm using it in a list-feed and I wanted to maintain the scroll position, so I've added `scroll={false}` prop to the Link component and also`router.push("/", undefined, {scroll: false});` on modal close.
Oh awesome! That's great to know!
You forget to say that Middleware slow down app because it rerender every time when you change a route. I am trying to set cookie without midlware but can't find solution
Do you finded some solution?
hello Ryan, how can I use the cache function, I don't know how to get it from the React Canary. Great video by the way that's why I want to use it in my project.
The cache function is only available for React projects that use Server Components. If you're using RSC you can `import { cache } from "react";` and it will work. If you're not using RSC then cache is a no-op and doesn't do anything. Hopefully that helps!
@@RyanToronto hello Ryan, how do I know if I am using RSC? What is an example of a Server Components?
@@RyanToronto hello, it has something to do with the React Canary?
but then, how do i set a cookie from my api ? like i would like to update the session ID of the user of my website, and i can't seem to find how to save a cookie on their browser with the session id from the api request... because : cookies().set( bla bla bla ) will just set the cookie for the response but then it gets lost
cookies.set should do it! Take a look at the docs, you might need some options like how long until it expires: nextjs.org/docs/app/api-reference/functions/cookies#cookiessetname-value-options
@@RyanToronto yes, already tried but the request comes from a server component so it only sets the cookie on the reply. Anyway i solved my problem so it doesnt really matter anymore, thanks for the help though :D
@@akopaaa How did you manage to solve it?
What would happen if wrap a transition in a transition? The outer transition holds a state for the inner transition or are they batched together or “unwrapped” like it was a promise passed to a promise constructor? lol idk if that makes sense
Great question! Transitions that wrap transitions are very common and I think saying they are "batched" is the right way of thinking about it. If a transition is inside another transition then neither state update will apply until they are both ready. In other words the state updates happen at the same time for all nested transitions.
@@RyanToronto cool, yea that makes sense, thanks!
Best explaination on earth. Thanks
Thank you!
Ryan, this is a game changer explination. So glad I found this channel. So well broken down
Thanks!!!
preloading restricted data in RSC makes sense as its not visible in any way to the end user. good video
Thanks!
Hi Ryan, it's a very instructive video. Cloud you please clarify how ISR feature will work for Modal?
Hey there! I think ISR should work with the modal. If the homepage or an image changes you'd need to ISR both pages.
Thank you, I was actually watching this in a private window "doing some testing", I had to login just to like and sub.
Wow thanks for the kind words! Really appreciate it!
Thank you for this video