How NextJS REALLY Works

NextJS is probably the best way to build your next React application. There are few better ways to do full stack with Javascript. Hopefully this video helps you better understand why!
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[@asiraky]

As someone who’s been mildly critical of some of your videos, this video is spot on. I’m sick of explaining what you just explained here, and I’m going to direct people here from now on.

[@iGhostr]

same

[@huebdoo]

Yeah .. Im an SEO guy trying to explain how to deploy JS correctly ... this makes my work with engineering teams a lot easier ... thank you!

[@Johnson-ks5uw]

I love your style of explaining and you really seem to know what you are talking about, including all the other videos you made about next. You saved me probably tons of hours of research and I am really thankful for that!

[@gabrielwest2584]

You dropped this video at the perfect time! My team is starting a new application and we're considering nextjs and this was an awesome introduction :)

[@itzfinners7458]

Loving the new production style of video editing Theo! Just the inclusion of a "Coming Up" section is a great addition!

[@abel090713]

I missed like half of this live video so glad the video came out, this might be a personal favorite

[@NikitaLipkanovOfficial]

Love the explanation about that! Thanks for clarifying!

[@ShiloBuff]

This is amazing depth and details. Right down my alley. I like your style. Thank you.

[@phucnguyen0110]

ty Theo, just what I needed since I've been playing with Next a lot these days.

[@faizanahmed9304]

That is a beautiful explanation, thank you, Theo!

[@matthewvalentine9961]

at this point of my development journey ( very new here , self taught 8 ish months in ) . your content is exactly what i needed, thank you! it feels like this is a conversation/explanation that i would have or want to have when apart of a team. very much “in the field” vibes. helping tie in the knowledge of tools & how to think of developing with them ! stay safe. thanks again !

[@teosurch]

Thanks a lot. So good to learn this things not by using documentation, but by watching nice KZbin channel with a cup of tea :)

[@shivamjhaa]

Hey Theo. Great video as always. Can you make a video regarding what libraries/ packages are you using at ping to solve problems that you faced?

[@DennisHorn1981]

This is absolutely important background-knowledge! Fantastic explanation! Thank you! 😀👍

[@JavierPortillo1]

Thanks Theo!! I've been reluctant to adopt Next and other SSR tools because I didn't understand them. Now that I've heard your explanation I can see how cool Next is 👍

[@kolega1999]

I was the same man, then I tried it and found out that it is actually kind of a wrapper around your React application which lets you render portions of it on the server. It can seem as a lot when you read or hear about it, but when you actually start building with it following the docs, it all makes sense and it's not nearly as complicated as I thought before. Having a kind of solid understanding of React helps though, you can then easily differentiate Next from React parts.

[@giovannicostantini6269]

You're an amazing person! Great quality content

[@mohamedhassenetetbirt6841]

Amazing work, helped me fix small confusions

[@samuelgunter]

14:00 The card preview has been disabled for everyone since April 2022 because the styling of the validator was different from the actual website

[@doritoflake9375]

Thanks for sharing! I suddenly started seeing this as well recently on my sites and was wondering what broke lol

[@t3dotgg]

This is super good to know thank you

[@dipneupane3179]

You explained it so easily. Thanks for the effort.

[@robgioeli]

The intro music and clip-of-content before the explanation video starts is gold. You should start doing this again.

[@sarmunbustillo9217]

Uff what an explanation! Really good video!

[@georgekrax]

We needed a video like this 🙏

[@mtin79]

Awesome, would love the same for remix run!

[@MehediHassan-pn5uc]

Really Love All Your Videos ❤️

[@victorbrown3155]

We really need this for app router as well. Especially how navigation works!

[@artemiygolden2853]

The best lectures I've seen were given by professors using a blackboard. It just occurred to me that you archive the same greatness by using Excalidraw! Amaizingly clear and useful content! Thanks a lot!

[@faraonch]

Thanks for this. Will just send it to all my colleagues who are asking me over and over again why I almost always choose NextJS. The cons are no cons, as I can opt out easily but still getting all the benefits especially as you mentioned the f##!@# developer experience, live reload and the option to have everything without hacking it on my own.

[@eliuddyn]

Amazing explanation 🔥🔥

[@JoelMathewmatgoogle]

Thank you for this!

[@FernandoJaramillo-jw7nm]

Very nice explanation, Thank you...!

[@austincodes]

One of the huge things that is overlooked with nextJs is the build tools

[@elhaambasheerch7058]

Great video! You just earned a sub theo.

[@oscardasilva971]

Valuable content, thank you

[@berkaycirak]

Thanks for sharing, you have mentioned that when browser requests to next server, next will execute getServerSideProps and then react will use those props. However, we can use getStaticPaths function to serve all dynamic routes pre-rendered HTML in built time. In that case, when a user requests to next server, will next server execute some react or just sending the pre-rendered HTML in built time instead of runtime?

[@AsheAve]

Nice explanation. Thank you.

[@georixyo7115]

genius explanation, thanks!

[@dixztube]

Great job man!!

[@prasad_yt]

Thanks for this helpful video.

[@paulyi9365]

Great video as always! I’ve only been working as a software eng for two years, so I’m always listening to your VODs! I was wondering if you could talk about mobile app development a bit more in depth (I saw your Code Wars working with Flutter, but I’d love to see you take a deep dive on React Native)

[@user-ux9ud7gf6q]

This is soo good. Thanks !

[@mmgordion]

You forgot to mention that because of nextjs's server we can also create a minimal backend api, which is extremely useful for small fullstack projects. It is also something that only nextjs has, comparing to vite and CRA.

[@jazsouf]

Next also has some caching mechanisms that can be good or bad. You don't get that with a regular Vite React SPA.

[@tastelikecrypto7051]

The way I understood it is next js is aiming to do what Angular does. Thanks for the content.

[@vincentnthomas1]

No?

[@bryanngen5572]

i watched this video when it first came out and again last night. got much more out of it after getting my hands dirty with Next great video

[@pedroalonsoms]

your videos are awesome❤

[@ragnarlothbrook8117]

awesome video! Thanks 👍🏻

[@aaronmendez9284]

The sun is energy. There is life on Earth. This video slaps. We all will pay taxes. These are nothing but straight facts. Great content Theo!

[@anuragk6722]

awesome video, wondering which software you use to record the screen and your face?

[@tuktuk9004]

great explanation

[@NuanceWebsites]

you deserve a Nobel Peace prize for this youtube channel

[@sidwebworks9871]

I think the video title should be "How SSR/SSG works?". Also I would argue that a Next app is a multi-page application because the client still requests a new page when you visit a new route, it's just that the next router and hydration patterns makes it "feel like a SPA". It's not really a SPA. Anyways good video.

[@rico454]

It is an SPA. _app only mounts once and handles all page routing so _app is the single page. NextJs just handles it quite cleverly making everything seem less. But you are right, the title of the video was confusing since I was expecting a deep dive into how the framework was built.

[@sidwebworks9871]

@@rico454 What you said is true and yes I think the terms are usually juggled around. Although it looks like MDN defines a SPA as an application which loads a single document page and updates that document's body using javascript. You can look it up. AFAIK it's neither of those 2, it's a Hybrid react framework.

[@sitter2207]

@@sidwebworks9871 Thats what i think of when I hear SPA as well. So I'm a bit confused still. If that's not how nextjs works, then its just a MPA, that becomes SPA after html is requested, why not just become a static page at this point ? Isn't being SPA the biggest selling point of... well single page applications ? Because it makes navigating through pages so much faster. But next loses that ability by requesting the server side rendered html at every route change. I feel so dumb for not understanding the point of nextjs but im also still a beginner

[@rico454]

@@sidwebworks9871 Maybe I’m confused but doesn’t Next adhere to that criteria? _app is loaded once and everything else is loaded with javascript, whether it’s static or SSR? Well that’s how I assume it works, I might be wrong

[@jjrise]

dang, solid video!

[@msrini]

Good video editing

[@OhDevBeard]

Hey Theo, video on upgrading T3 app to use the app directory update of nextjs next? Why? Just because!

[@pablom8854]

22:13 basically React explained in one phrase 😂

[@yogiadianta1156]

Hey theo, where can i found your vs code setting and extension list?

[@i-am-the-slime]

Would've been nice if you had explained how Nextjs works like with bundle splitting etc.

[@joepetrillo6185]

How does NextJS handle links to other pages? Will the page its going to act like a normal react app (instant switch) if there is no server side rendering? What if the page its going to is static?

[@venus-sz2sl]

Love the thumbnail 🤣😍

[@luisllaboj]

I've been learnig NEXTjs for almost a week reading the Pages Router docs, and there's something that still doesn't make sense in my head.... When a page that was rendered on the server gets to the client as a Loading state or as an UI skeleton, does that mean that the server have a "correct" but empty HTML version of what the user gets after the client fetches and loads the data? Only then the user gets the 2nd correct but complete version of the same HTML page? Idk if that's clear enough, hopefully it is..

[@user-ge2vc3rl1n]

How do you learn stuff like this? I know I learned it from you but how do you find resources to learn things like this. Some apps like Next have documentation that is extremely insightful but nowhere in the React docs would I have learned how react actually works.

[@voidmind]

I will also use this video to answer questions

[@johndoyle3816]

sick painting

[@techne_]

I REALLY need a perfect SEO. I have just dumped NuxtJs which was terrible and I am in love with NextJS. Even tho it will take me a couple of months to rewrite I already see it will be smoother overall.

[@nan5715]

Explain how next js is a spa? If I request a different server side page then it has to go to the server right? The entire app isn’t loaded on the client?

[@harshilparmar9076]

So if we don't use getServerSideprops it will still generate static html for us but for data fetching it just works like Client side React. Am I correct?

[@mike110111]

I'm confused - I've been following along with your T3 Stack Tutorial (I'm up to the part where we show user details in each tweet) and the page is definitely hydrating on load, the initial HTML is just a skeleton... Which seems to contradict what this video is saying?

[@davorinrusevljan6440]

I am still trying to wrap my mind about what happens when page contains components that can not be rendered on server, how does all that gets stitched up. I guess at best there would be holes, or place holders for client side to fill in?

[@SamyarBorder]

How nextJS optimizes application for SEO? so if it's steel spa why we can't have good seo with cra?

[@excalidraw]

3:40 Shift-Opt-drag your line to duplicate on the same position and drag it on the vertical/horizontal axis 📎📄

[@coder1122]

Just awesome

[@MrJgracias]

Many newer developers are running in development. Local host and all that, personally I have made a call to local storage in dev mode, and the program works fine. Will that not work in production?

[@GeekOverdose]

I wanna see if its possible to have React SSR with something like Spring boot

[@mrxcreamy10]

What does React Native do with expo?

[@notfadeaway6617]

Why some people still use firestore on SSR? What are the benefits?

[@persas1683]

Hi everyone, am I missing a part, or is this video simply explaining that NextJS will take care of the server-side processing through getServerSideProps and return the rendered HTML as a result. After the HTML has been returned to the client, the next part is entirely in react.

[@JLarky]

24:31 I disagree, otherwise how come next.js ships bundle that is like 2x the size of comparable React+vite SPA?

[@guillermoquiros2402]

Just Great!

[@MrStanley85]

I had a hard laugh on "servers dont have windows because they run linux" :D excited about t3 stack

[@TheUltimateGeminiHasSurvived]

I shared this with my co op student! Can you make the same for Astro?

[@cameronratliff8441]

we have nest js backend and are looking to move to next js on the front end (from CRA). Server components seem really cool and powerful, but I am trying to wrap my head around how they can be used with an API and without bypassing guards. Any tips?

[@zhongtom2625]

Do you mean bringing client credentials, such as tokens, when the server component making requests?

[@KevinOfSteel]

Great explanation! Just not gonna ask any questions to avoid being outright stupid.

[@stvlley]

when I see your videos I feel I am being assigned homework... "if you wanna get good at this you better watch his video"

[@MrBlazzerBoy]

The font is hard to read on an 8 inch tablet. Can you please switch to some sans serif font?

[@nroose]

Next can't do all of the things that can be in "this is next". The server could serve the original page with some parts that are based on cookies, etc.

[@FlorianWendelborn]

Do you need to opt-in to Twitter Card Validator somehow? I’m getting a `403` error on both Firefox and Chrome when I try to use it, no matter what URL I try (even from other, well-known websites) Actually, I have the same symptoms as seen in 14:00

[@SatyamSingh-rq2tc]

The Twitter card preview has been disabled for everyone since April 2022.

[@FlorianWendelborn]

@@SatyamSingh-rq2tc Amazing that they still have the website up then lol

[@nan5715]

What does it mean by correct html?

[@Lambda1235]

Can this be used to obscure the api of the admin page? If an attacker tries to load the admin page without auth he wouldn't even know what js he should load, which would know how to interact with the api. Am i correct?

[@m0rt068]

I don't know what you mean but serious information or data should always come from a secured api. You shouldn't just hide sensitive information in your client side app but should also secure your backend. Always verify who the user is in your backend before you send that data to your frontend. Doesn't matter what you are using this shouldn't be problem.

[@Aristocrator]

Why not to put an actual html into the react root page instread?

[@vishalsangole836]

so react is still shipped to client huh

[@hemanthkotagiri8865]

is this still valid after Next.js 13 Release?

[@deamorta6117]

Your voice sound really arrogant but you really are a good teacher which negate the latter hahaha thank you so much

[@apratimjaiswal]

Amazing

[@samuelgunter]

amazing video

[@samuelgunter]

probably, I haven't finished watching it yet

[@samuelgunter]

my hypothesis was correct (I watch at 2x speed)

[@luissolanodev]

Is there a reason to ever use something like vite given your statement about regreting not be using nextjs when SEO becomes relevant?

[@magne6049]

you can SSR with Vite too

[@luissolanodev]

@@magne6049 thanks! I guess my question is more about where do tools like vite fit? Does it come down to the other specific feature they have other than SSR to determine whether I want to use (i.e.) vite vs nextjs? Sorry I may be just lacking knowledge about vite

[@nroose]

I guess I would say "incomplete" rather than "incorrect" for the initial html.

[@niksatan]

Dude, you are the best in making this voodoo technologies accessible to n00bs, thx!

[@AndrewTSq]

Is PHP considered server side rendering?

[@mqix3741]

Yes its its whole purpose

[@magne6049]

PHP and the likes do "classic server-rendered templates", but SSR is generally used to refer to rendering an SPA on the server. Using SSR for the former can be confusing, albeit semantically correct.

[@henrmota]

You should do the same for the new version....

[@lightninginmyhands4878]

React = interactive sites Next = HTML correct for sites as soon as they load

[@muss-raff5477]

Either I'm too dumb for cs,Web dev, ,programming 😢 or that this video is for newbies with next cause i didn't get nothing worth watching 26 min of saying next give correct html and react give blank page at first load . Im i correct 🙁 or did i miss the point wtf🤕🤕