Learn Next.js Parallel Routes In 16 Minutes

Next.js + React Course: reactsimplified.com/?...
The app directory massively overhauled and improved routing in Next.js by adding tons of new advanced features. One of those features is parallel routes which make working with complex UIs that contain many unique elements much easier. In this video I will break down everything you need to know about this concept and also talk about what this concept can do for you.
📚 Materials/References:
Next.js + React Course: reactsimplified.com/?...
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⏱️ Timestamps:
00:00 - Introduction
00:55 - Parallel Route Basics
05:18 - Conditional Route Rendering
07:42 - Advanced Routing
#Nextjs #WDS #ParallelRoutes

[@dawidwraga]

Vercel needs to watch this video and improve the DX here for sure

[@tiktalk4573]

seems very DX friendly to me!

[@theisoj]

Great video! Thanks Kyle as always! 👍

[@skapator]

Is this the birth of the term folder/file hell ?

[@adammilner4512]

this looks horrifying, so much overhead even in this super simple example

[@untalentedwebdev]

exactly my thots

[@tiktalk4573]

I don't agree

[@mohammadahmermalick7869]

Thanks you bro! I love your channel ❤️ You are doing a great job 👍

[@sujjee]

Thank you for explaining parallel routes in such a simple and easily understandable way. By the way, could you also explain Drizzle the way you explained Prisma in one hour?

[@marcialabrahantes3369]

drizzle is most like SQL. you can learn SQL and it'll transfer over pretty seamlessly

[@wchorski]

would love a talk on how to create a template app that is shared between multiple clients. With tips on how to handle 1. unique assets 2. customer side configuration 3. adding and pushing updates across all instances of this app

[@theavazov]

Great video Kyle, can you make a video about i18 in app routes?

[@code_react]

WOW. this is amazing to learn.

[@nkululekomthimkulu1248]

Looks cool. I'll try it out.

[@FerroMeow]

Such a cool feature, I love this!

[@adammilner4512]

useless feature lol

[@berniko4954]

@@adammilner4512 ikr lol

[@BugsNRoses_]

happy new year kyle❤

[@tom.watkins]

The main benefit of this is being able to use the loading and error pages within each parallel route i am guessing. For most cases its fine to just import the server components, you hust have to remember to put your own suspense/error boundaries around them

[@chrtravels]

I was wondering why this would be necessary when you could just import server components. This makes sense though. I could see the benefit of having the separate loading and error pages. I am not very familiar with using suspense/error boundaries, so that is something I need to delve into.

[@tom.watkins]

@@chrtravels loading and error pages are just a nice abstraction over having to put in your own suspense and error boundaries so it's a nice DX improvement for people less comfortable using them. That being said, it's worth knowing how to use them yourself as Suspense in particular is usefulfor other things in react, things like lazy imports and the new 'use' hook with promises as props both work very nicely with Suspense

[@planesrift]

Top notch developer experience.

[@otn987]

The conditional rendering works the same way using parallel routes or not with slightly different syntax. if(!isLoggedIn) return Vs. if(!isLoggedIn) return login. Am I missing something?

[@nemeziz_prime]

Can you also do a simple video on subdomain routing in React/Next.js?

[@kellingtoncrivelaro3929]

Would love It too

[@anhvuuc8693]

This still easy, Intercepting Routes is an headache :D Hope you can have a video for it

[@VinayTandale]

Its being complicated day by day easier the simpler the better

[@bayuputraefendi4717]

Thanks, now i can improve my code

[@ddrweb_]

Hi, thanks for the video. I have a question tho, If I create a route with parallel routes, why do I need to declare/create the parallel routes for my nested pages, maybe I want them just for the main parent , feels a bit weird :|

[@whoman7930]

Yeah, that's really odd. I always have to add a default page that returns null to counter that. 🥲

[@nguyenchin7798]

thank you !!!

[@WARE_DOG]

Bro, can you teach how to setup folder, to use StyleXjs with nodejs.

[@jessyndaya9487]

It's too much for nothing my friend 😅

[@johnsimms9875]

What are the benefits of doing it this way? Is it faster/more performant?

[@firewatermoonsun]

What if I don't want User Settings and Article Settings but just want /dashboard/settings with Settings folder?

[@cqz89]

App routers will add extra json at the end of your html, double page size, the response time is slower than page router.

[@milan5131]

3:37 react has type for ts that makes it simpler to define types where u want to use children so you don't need to define type for children: PropsWithChildren

[@havokgames8297]

This video did a good job of _how_ these works. But I really can't tell the _why_, because the examples are so generic. Is this useful for a multi-panel layout where you navigate within the panels separately? Maybe something like a playlist + music player?

[@chrtravels]

The docs aren't clear but it sounds like the parallel route has to be a server component. I have a PostList server component, that I could turn into a parallel route, however I have a PostCard, which is imported into the PostList. The PostCart is a client component. So I would not be able to use the Parallel routing on the cards themselves? It's the cards that I would want to have the loading state on.

[@Goofy8907]

Is the purpose of this to increase app performance or just to improve the dev experience?

[@Slaat1]

10:40 thank you for touching on this! It's a shame this is so buggy in dev

[@RadianRasyid]

i dont't know im not able to use parallel route just like how you do it. it worked for the root layout, but not for the nested route. i'm using nextjs version 14.1. maybe a little help?

[@user-ej8zb7id8v]

Anyone know if it's possible to have a wrapper layout or page to pass in props to the slots? The use case if there was interactivity outside of the parallel routes that can show/hide a particular slot from a button click.

[@lasindunuwanga5292]

It is today I got it. Your channel name is real. It is not just a fancy name. You really make stuff simplified.

[@thomasmiller1406]

Cool, would be nice if there was away to define common children compents like loading and error. Personally i prefer this over being verbose but not going to lie running in dev mode looked absolutely horrendous!

[@saudalghamdi5608]

Hi Kyle, when are you going to launch the Next.js course? I'm thinking about learning Next.js and there is no better teacher in the JavaScript world than you!

[@TabuHana]

Its in the description

[@WebDevSimplified]

It will most likely be this month

[@aravind.a]

what is the advantage of this? We can also use swr to load each content on page.

[@dextrox2698]

This feature may seems useless to some ppl but along the line it comes to tackle some problems i.e intercepting routine

[@a_m___s_y]

Parallel routing is powerful, but it's absolutely annoying when use it in development mode. Go through the document many times and finally find out the issue only exist in development mode from your video... thanks for your video

[@KnaveKaiser]

thank you for the great video. can you make a video demystifying internationalization in the next js 13 using app router? I'm having a hard time setting it up in a way where the default locale does not pollute the url. thanks again.

[@carlosbotero1947]

There is a really cool library called "next-roots" that have a great i18n solution .

[@ismaeltinta6118]

+1

[@RealRhythmandPoetry]

Can't remember how but I got it working with i18next and some youtube guides a while ago :)

[@boglegogle]

Using i18Next, super easy to set up and works great. The default locale doesn't show up in the route and next handles all routing for you so if you never have to specify locale routes, it just does it

[@movoyemickele]

Hey Kyle, I'm curious if there's a method to eliminate the loading time experienced when navigating between pages in NextJS. I'm aiming to develop a Progressive Web App, but I've noticed that NextJS fetches each page from the server based on the URL, leading to some delay. This contrasts with React Router, where page transitions are nearly instantaneous since it doesn't require fetching the new page for every navigation. Is there a workaround or solution for this in NextJS? I almost think NextJS sucks for PWA.

[@vivekkaushik9508]

PWA and SSR doesn't make sense. In order for an app to be PWA you've to make the app CSR so that client can download the entire app and run it offline

[@movoyemickele]

@@vivekkaushik9508 Do you have any insights on implementing this in NextJS? Simply specifying 'use client' doesn't work, as the app's router is designed to deliver individual pages for each specified URL. I'm looking to enable the user to download the entire app, similar to the experience with plain React where the user downloads the entire app. Any suggestions?

[@twothreeoneoneseventwoonefour5]

@@movoyemickele why are you even using nextjs then. That's like buying a car to go to a store 100m from your home. Use Vite instead for your purposes.

[@jaspreetmaan121]

​@@movoyemickele if you don't use ssr, don't use next js

[@acousticmunda6400]

@@movoyemickele just use "use client" in the parent layout file

[@MrAlao675]

One of the turn offs here is restarting dev server. Well I don't have a use for the complicated parallel routing for now😊

[@Daddyjs]

You are a Next js GOD

[@user-ur9wf9tg5p]

Thank you for the explanation on parallel routes. However, I was wondering if you could possibly show me what the code in the 'wait' function, which is located in the 'lib' folder, looks like? I would appreciate your help.

[@BradenKelley]

probably just something like `const wait = (ms: number) => new Promise(resolve => setTimeout(resolve, ms))`

[@user-ur9wf9tg5p]

@@BradenKelley Your answer helped me understand it better. I appreciate your assistance.

[@ahmadmuqadas78]

i love your hiar bro

[@raphaelpicard8981]

Hello, I wanted to know if with your videos there is the possibility to put subtitles in French?

[@griffadev]

Tried using this feature and had to back it out because its so unstable (for the more advanced uses ) the fact it's so buggy in the tutorial only proves this

[@alirezak5870]

even if you use middle wares and auth packages on this feature you get in trouble more because slots children or any props you are passing in your layout don't work as you expected. and your route system completely make parallel bugs.

[@Henrique01010]

You did an amazing job explaining this. It looks like a clever way to place multiple server components in a single page, until it doesnt. It gets annoying really fast with the nested files and development mode gets super buggy. I cant believe Next is releasing this, the framework was once an example of great DX...

[@shawnxiong2011]

This nextjs dark magic is overcooked

[@naufalnasrullah6965]

7:29 insert a login page inside of dashboard isn't good idea, it should have its route alone

[@donaldpetervicente8351]

Hi Kyle how do you do the shortcut to instantly imported the red tagging(error)(wait) that is not manually imported? what is the shortcut key? Thanks in advance.

[@debopamgupta9505]

Ctrl + . Will bring up the code actions in vscode which has many options, here you have the option to auto import the function

[@donaldpetervicente8351]

@@debopamgupta9505 Many thanks bro!😁

[@kenshinhimura3140]

I mean that the component folder in react is dead because now every pages have his folder component.

[@unajujupiter6725]

unable apply conditional routes to home page, i guess the layout for home page is RootLayout which is a little bit different, anyone have done it before? just wondering.

[@lcarv20]

The dx looks awful. Having to restart the dev server frequently is annoying, not to mention the dev glitches that I have already spent hours trying to fix thinking it was a problem with my code.

[@faizsyed658]

True. Classic front end bloat

[@user-js4yw1gv7m]

I did not understand a thing. Isn't it true that a route sits on a separate url? 1. Why do you render everything on one page? 2, How is it possible to have a parallel routes if a route is always loaded one at a time. If you have 2 route on the same route, ut's just a plain component, not?

[@mahadevovnl]

You can change the indentation of your file tree on the left in VSCode, could you please do that? The default 2px indentation is horrible and makes it hard to see what folder is inside what folder.

[@N8X4TE]

What is a good use case for this?

[@DavidSmith-ef4eh]

Making developers switch to vue or svelte, I guess...

[@N8X4TE]

@@DavidSmith-ef4eh fr

[@berniko4954]

@@DavidSmith-ef4eh lol thats why I switched to sveltekit, but then switched back after a month because uk,I do not want to be a broke

[@rodrigocremella]

Great video. But I decided to skip Next JS only because the server error on each render/code change 🤧

[@bpaintx2]

Sounds like a code problem, not a Next JS problem ;)

[@boglegogle]

That means you have an error... Next js hot loading works just fine

[@ikbo]

Why does the course say "next.js coming soon"? Has it not been released yet?

[@user-sc2dc4ud7b]

You can name pages components with different names other than just "Page"?!

[@user-ye2fw4do4d]

Can you make a video on how to create 2 diferent set of pages with same names but for mobile and for desktop so we don't need to have code mixed can have 2 diferent routing and as a plus if theres a way to make url only show main donain feven being in pages like maindomain/blog but i just see maindomain I was trying to do sometihng likes this App [...mobile] to catch all mobile (mobile) to group all mobile and create an invisible /mobile page.tsx store page.tsx page.tsx layout.tsx inside layout my idea was create an const isMobile = window.innerWidth

[@Slaat1]

6:41 I know you wanted to give a good example but this isn't one, authentication should be handled in the middleware. you could have checked for user role and displayed different components

[@TeaBroski]

Like this if you appreciate Kyle's content but need to 1.5x to not follow asleep

[@hellokevin_133]

I respect you and appreciate the work you put into your courses, but given the quality of the recent React & Next docs, I think it'd be silly to take a course or look elsewhere for learning these technologies.

[@ts3798]

No offense, but this is a stupid comment. A lot of people prefer to learn by watching videos.

[@GermansEagle]

I disagree. The documentation says how things are. The course is using it in a professional manner. There was docs on react hooks, but his course changed how to actually use them.

[@jacobphillips9235]

Thanks!

[@WebDevSimplified]

You're welcome! I am glad you enjoyed the video.

[@ionutsandu5913]

How is this a benefit over just creating components and conditionally render them?

[@Rkdo_Dev]

in this point of time, nothing.

[@Dylan_thebrand_slayer_Mulveiny]

2:00 why would they inject HTML into the suspense component as a property. Shouldn't that be a slot instead? That seems incredibly bad to me. I can't possibly think of a legitimate reason to do it that way.

[@0xAndy]

Thoughts on Parallel Routing in Next 👎 too much boilerplate 👎too buggy in dev (barely usable at times) 👎not ready for prod. Next should improve the DX immediately before pushing this further

[@DavidSmith-ef4eh]

Just look how many files he had to create. And we all know that creating files is the slowest part of developing :D

[@yashyadav5116]

parallel routing

[@Niksorus]

Hot damn, yet another way to do the exact same thing 🤣

[@abubakarkhawaja6082]

sounds like a video for "why you shouldn't use Parallel routes in Next.js"

[@yashyadav5116]

learn by doing

[@user-ud4bj9vc7l]

NEED MORE FILES

[@justafreak15able]

Bro just rediscovered Components 😂

[@elephant_888]

Way too many abstractions. This makes me so happy I’m learning HTMX!! We’ve really gone crazy with the frontend frameworks. 😅

[@DavidSmith-ef4eh]

Crazy. I wanted to switch my teams project to the new app dir structure, but I guess we'll just stay with pages forever.

[@DaviAreias]

I started using nextjs on my journey but then changed to rust+ vite on the frontend and reduce ram usage from 100~120 MB to less than 10MB, that was before the newer nextjs versions btw

[@DavidSmith-ef4eh]

@@DaviAreias learning rust as well, but doubt i will push it in my company. It just makes no sense for them, since the bottleneck are the connection speeds and our database. but I will certainly use it for my own project. Don't know about vue though, react has a great ecosystem.

[@DespicariPirates]

[@DannyBLV]

all these issues in dev mode doesn't worry anyone here ?

[@DavidSmith-ef4eh]

Great. I always wanted to restart my env after a change. Nextjs is really pushing things further...

[@avijitchanda7944]

I don't find anything good in this use case also don't know what next js trying to do 😅😅😅 I love pages even more

[@amined801]

this is nice, but i think it's better to go with Laravel (Laravel ecosystem provide you everything you need depends on your project) instead of try to learn every next js new feature which maybe will change in future again haha

[@bpaintx2]

So Laravel never updates?

[@amined801]

@@bpaintx2 they do but they don't change everything

[@InsidiousGT]

This looked cool until the advanced routing section. DX took a nosedive at that point, should've left the feature off until the DX is baked

[@kerovinvillegas6402]

Im not really fan of this feature. Just dont overthink things. You can create this "parallel" with simple container component with less complicated pre-requirements.

[@rishiraj2548]

🙏👍

[@rahilansari261]

Why can't we just render components rather creating parallel route

[@ruanxun9454]

Anyone having a real life use case using parallel routes?

[@penyintastoxic]

I still dont understand how this feature will useful for my project

[@user-ei7dg6dw6i]

イケメン

[@josephmgift]

🎉

[@Caldaron]

another "stable" feature of app router...

[@DoItWithADance]

What a complete mess, I fail to see how this is simplifying my app code except bloating it. Perhaps it has uses in larger app code bases?

[@jatul28]

Why it's so much overly complex

[@Holykael1]

This feature is completely useless. Why create users and articles as "parallel routes" when you can just import the components into the dashboard and render them there

[@macctosh]

I have been asking myself this exact question.

[@ShantanuAryan67]

probably useful with shallow routing. layout components wont remount, data wont be refetched

[@neociber24]

In NextJS app-dir each route can have it's own loading, error pages, this feature allow you to separate the logic. Also share the layouts.

[@Holykael1]

@@neociber24 what's stopping you from defining those components in their own files and just importing. No need for any special feature

[@k4f]

Agreed. This is some over engneered bs. And buggy as hell

[@Marcosmapf]

So much complexity noise from the technology itself, looks so clunky to use

[@DavidSmith-ef4eh]

Next.js is getting out of hand. Formerly you could use code from your create-react-app SPA or client side rendered page, create a few files in the pages directory and call it a day. Now they want you to create millions of files, folders, subfolders. Never going to use app way. If they ditch pages, I'll replace the framework.

[@Munja12]

And not have SEO with SPA create-react-app.

[@maykon-oliveira]

You speak so fast 🥲

[@anthonyvolquez9514]

first comment!

[@vrushankgajula4584]

first reply

[@bpaintx2]

Boooooo

[@elpolodiablo5486]

Its better to use vanilla react with react router and vite then using buggy and slow nextjs.

[@CodingWithMrM]

I don’t think it’s useful as we’re already gonna have each route for each feature

[@x911]

This looks so buggy, definitely not production ready