#What is the correct folder structure for this app using the nextjs app router?

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final pivot
#

My app should have the following routes:

  • /browse/[mediaType]/[page] - [page] should be optional, and will default to 1. this will allow people to browse some paginated media (e.g. a list of tv shows from tvdb)
  • /view/[mediaType]/[slug] - this will render a standalone page of the given media item (e.g. a single tv show) with more detail

when someone is on /browse/[mediaType]/[page], i want them to be able to click on an item and have the url change to /view/[mediaType]/[slug], but render in a modal.

how do i do this? do i need intercepted routes? do i need a catch-all route for the optional route param? do i need parallel routes and slots?

strong juniperBOT
#

Hi @final pivot. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

#

To implement the routing structure you described using Next.js App Router, you'll need to use a combination of dynamic routes, optional catch-all routes, and intercepting routes. Here's the recommended folder structure:

app/
├── browse/
│   └── [mediaType]/
│       └── [[...page]]/
│           └── page.tsx
├── view/
│   └── [mediaType]/
│       └── [slug]/
│           └── page.tsx
└── @modal/
    └── (.)view/
        └── [mediaType]/
            └── [slug]/
                └── page.tsx

Let's break down the structure and explain each part:

  1. The /browse/[mediaType]/[page] route:

    • Use [[...page]] for the optional [page] parameter. This is an optional catch-all route that will default to 1 if not provided.

  2. The /view/[mediaType]/[slug] route:

    • This is a standard dynamic route structure.

  3. The modal implementation:

    • Use a parallel route @modal with an intercepting route (.)view to render the modal when navigating from the browse page.

To make this work, you'll need to:

  1. Implement the browse page in app/browse/[mediaType]/[[...page]]/page.tsx.
  2. Implement the standalone view page in app/view/[mediaType]/[slug]/page.tsx.
  3. Implement the modal version of the view page in app/@modal/(.)view/[mediaType]/[slug]/page.tsx.

You'll also need to update your root layout to handle the @modal slot:

export default function RootLayout({
  children,
  modal
}: {
  children: React.ReactNode
  modal: React.ReactNode
}) {
  return (
    <html>
      <body>
        {children}
        {modal}
      </body>
    </html>
  )
}

This structure uses:

  • Dynamic segments for [mediaType] and [slug]
  • An optional catch-all route for the [page] parameter
  • Parallel routes for the modal (@modal)
  • Intercepting routes to render the modal version of the view page
#

For more details on these concepts, you can refer to:

Remember to implement the necessary logic in your components to handle the modal opening and closing, as well as the navigation between routes.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@final pivot Kapa.ai is still learning and improving, please let me know how I did by reacting below.

final pivot
#

@strong juniper can i place the code for the modal closer to the page?

strong juniperBOT
#

Let me check the knowledge base for you again. Give me one moment! :books:

#

Yes, you can place the code for the modal closer to the page by using a slightly different folder structure. This approach can make your code organization more intuitive and easier to maintain. Here's how you can do it:

Instead of using a separate @modal folder at the root level, you can place the intercepting route directly within the view folder. Here's the updated folder structure:

app/
├── browse/
│   └── [mediaType]/
│       └── [[...page]]/
│           └── page.tsx
└── view/
    └── [mediaType]/
        ├── [slug]/
        │   └── page.tsx
        └── (.)[[...slug]]/
            └── page.tsx

In this structure:

  1. app/view/[mediaType]/[slug]/page.tsx is your standalone view page.
  2. app/view/[mediaType]/(.)[[...slug]]/page.tsx is your intercepted route for the modal.

This approach keeps the modal code closer to the related page code, making it easier to manage and understand the relationship between the two.

To implement this, you'll need to use the intercepting routes feature. The (.) in the folder name indicates that this route should intercept its siblings.

Here's what the Next.js documentation says about this approach:

Parallel Routes > Modals states:

"Parallel Routes can be used together with Intercepting Routes to create modals that support deep linking."

This method allows you to keep your modal code closer to the related page code while still leveraging the power of intercepting routes to create a modal experience.

Remember to handle the modal opening and closing logic in your components, and ensure that your root layout can handle the modal rendering appropriately.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@final pivot Kapa.ai is still learning and improving, please let me know how I did by reacting below.

final pivot
#

@strong juniper wouldn't it make more sense to place the @modal folder inside the [browse] folder? how would i do that?

strong juniperBOT
#

Let me check the knowledge base for you again. Give me one moment! :books:

#

Based on your question, it seems you want to place the modal intercepting route inside the browse folder instead of the view folder. While this is possible, it's important to note that the location of the intercepting route affects how it behaves. Let's explore how you can do this and what it means for your application structure.

You can structure your app like this:

app/
├── browse/
│   └── [mediaType]/
│       ├── [[...page]]/
│       │   └── page.tsx
│       └── @modal/
│           └── (...)view/
│               └── [mediaType]/
│                   └── [slug]/
│                       └── page.tsx
└── view/
    └── [mediaType]/
        └── [slug]/
            └── page.tsx

In this structure:

  1. The browse page is at app/browse/[mediaType]/[[...page]]/page.tsx
  2. The standalone view page is at app/view/[mediaType]/[slug]/page.tsx
  3. The modal version of the view page is at app/browse/[mediaType]/@modal/(...)view/[mediaType]/[slug]/page.tsx

The key differences here are:

  1. We've moved the @modal folder inside the browse/[mediaType] folder.
  2. We're using (...) instead of (.) in the intercepting route.

The (...) convention is used to match segments from the root app directory. This is necessary because we're trying to intercept a route (/view/[mediaType]/[slug]) that's not a sibling or direct parent of our intercepting route.

According to the Intercepting Routes documentation:

"You can use:

  • (...) to match segments from the root app directory"

This structure will allow you to intercept navigation to the /view/[mediaType]/[slug] route from within the browse pages and display it as a modal.

However, it's important to note that this structure might be less intuitive because:

#
  1. The modal code for the view page is now located in the browse folder, which could be confusing.
  2. If you want to use the modal on other pages outside of browse, you'd need to duplicate the code or refactor your routing structure.

That's why the previous suggestions placed the intercepting route closer to the view page itself. It's generally more maintainable to keep related code together.

Remember, whichever structure you choose, you'll need to ensure your root layout (or the relevant parent layout) can handle the @modal slot:

export default function Layout({
  children,
  modal
}: {
  children: React.ReactNode
  modal: React.ReactNode
}) {
  return (
    <>
      {children}
      {modal}
    </>
  )
}

Choose the structure that makes the most sense for your specific use case and team's preferences, keeping in mind the trade-offs between code organization and routing behavior.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@final pivot Kapa.ai is still learning and improving, please let me know how I did by reacting below.

final pivot
#

@strong juniper what does this error mean?

Error: You cannot define a route with the same specificity as a optional catch-all route ("/browse/[mediaType]" and "/browse/[mediaType][[...page]]").
strong juniperBOT
#

Let me check the knowledge base for you again. Give me one moment! :books:

#

This error message is related to how Next.js handles routing in the App Router. It's indicating a conflict in your route definitions. Let's break down what this error means and how to resolve it.

The error occurs because you have defined two routes with the same level of specificity:

  1. /browse/[mediaType]
  2. /browse/[mediaType][[...page]]

In Next.js routing, these two routes are considered to have the same specificity because they both match the same URL pattern up to the [mediaType] segment. The [[...page]] part is an optional catch-all route, which means it can match zero or more segments after [mediaType].

According to the Dynamic Routes documentation:

"Catch-all Segments can be made optional by including the parameter in double square brackets: [[...folderName]]."

The problem arises because Next.js can't determine which route to use when a request comes in for /browse/someMediaType. Should it use the first route or the second one with no additional segments?

To resolve this error, you need to choose one of these approaches:

  1. Remove the /browse/[mediaType] route and use only the /browse/[mediaType][[...page]] route. This will allow you to handle both cases in a single component.

  2. If you need separate handling for the case with no page number, you can structure your routes like this:

    app/
└── browse/
    └── [mediaType]/
        ├── page.tsx
        └── [[...page]]/
            └── page.tsx

    In this structure, /browse/[mediaType]/page.tsx will handle requests without a page number, and /browse/[mediaType]/[[...page]]/page.tsx will handle requests with optional page numbers.

#

By choosing one of these approaches, you'll resolve the conflict and eliminate the error. Remember to adjust your component logic accordingly to handle the presence or absence of the page parameter.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@final pivot Kapa.ai is still learning and improving, please let me know how I did by reacting below.

final pivot
#

@strong juniper if i want to have the intercept route, how would that match with the file structure?

strong juniperBOT
#

Let me check the knowledge base for you again. Give me one moment! :books:

#

Based on your previous questions and the desire to have an intercepting route for the modal, I can suggest a file structure that incorporates this while keeping the code organized. Here's how you can structure your app:

app/
├── browse/
│   └── [mediaType]/
│       ├── page.tsx
│       └── [[...page]]/
│           └── page.tsx
├── view/
│   └── [mediaType]/
│       └── [slug]/
│           └── page.tsx
└── @modal/
    └── (.)view/
        └── [mediaType]/
            └── [slug]/
                └── page.tsx

In this structure:

  1. The browse pages are handled by app/browse/[mediaType]/page.tsx (for requests without a page number) and app/browse/[mediaType]/[[...page]]/page.tsx (for requests with optional page numbers).
  2. The standalone view page is at app/view/[mediaType]/[slug]/page.tsx.
  3. The intercepting route for the modal is at app/@modal/(.)view/[mediaType]/[slug]/page.tsx.

This structure uses the intercepting routes feature of Next.js. The (.) in the folder name indicates that this route should intercept its siblings. In this case, it will intercept the /view/[mediaType]/[slug] route when navigating from the browse pages.

According to the Parallel and Intercepted Routes documentation:

"(.)folder: Intercept same level"

This means that the (.)view folder will intercept routes at the same level as the @modal folder, which includes the view route.

Remember to update your root layout to handle the @modal slot:

export default function RootLayout({
  children,
  modal
}: {
  children: React.ReactNode
  modal: React.ReactNode
}) {
  return (
    <html>
      <body>
        {children}
        {modal}
      </body>
    </html>
  )
}
#

This structure allows you to keep your modal code separate from your main routes while still leveraging the power of intercepting routes to create a modal experience when navigating from the browse pages to a view page.

Parallel Routes > Modals provides more information on how to implement modals using this approach.

</assistant_answer>

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@final pivot Kapa.ai is still learning and improving, please let me know how I did by reacting below.

final pivot
#

@strong juniper can i export my component to handle my /browse/[mediaType]/[[...page]] route and use it in the /browse/[mediaType] component and initialize the route params to default values?

strong juniperBOT
#

Let me check the knowledge base for you again. Give me one moment! :books:

#

Yes, you can export your component that handles the /browse/[mediaType]/[[...page]] route and use it in the /browse/[mediaType] component with default values for the route params. This approach can help you reduce code duplication and maintain consistency across both routes. Here's how you can do it:

  1. First, create a reusable component for the browse page:
// app/browse/[mediaType]/BrowseComponent.tsx

import { useParams } from 'next/navigation'

type BrowseProps = {
  mediaType: string;
  page?: string | string[];
}

export default function BrowseComponent({ mediaType, page = '1' }: BrowseProps) {
  // Your component logic here
  return (
    <div>
      <h1>Browsing {mediaType}</h1>
      <p>Page: {Array.isArray(page) ? page.join(', ') : page}</p>
      {/* Rest of your component */}
    </div>
  )
}
  1. Now, use this component in both route files:

For /browse/[mediaType]/page.tsx:

// app/browse/[mediaType]/page.tsx

import BrowseComponent from './BrowseComponent'

export default function BrowsePage({ params }: { params: { mediaType: string } }) {
  return <BrowseComponent mediaType={params.mediaType} />
}

For /browse/[mediaType]/[[...page]]/page.tsx:

// app/browse/[mediaType]/[[...page]]/page.tsx

import BrowseComponent from '../BrowseComponent'

export default function BrowsePageWithPagination({ params }: { params: { mediaType: string, page?: string[] } }) {
  return <BrowseComponent mediaType={params.mediaType} page={params.page} />
}

This approach allows you to:

  1. Reuse the same component logic for both routes.
  2. Handle the case where page is not provided (in the /browse/[mediaType] route) by using a default value in the BrowseComponent.
  3. Maintain type safety by explicitly defining the expected props for each route.
#

The useParams hook from next/navigation can be used within the BrowseComponent if you need to access the route parameters directly within the component. However, passing them as props as shown above is generally a cleaner approach.

Dynamic Routes in the Next.js documentation provides more information on how dynamic route parameters work in the App Router.

Remember that this approach assumes that the logic for handling both cases (with and without pagination) is similar enough to be handled by a single component. If you need significantly different behavior between the two routes, you might need to adjust this strategy accordingly.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@final pivot Kapa.ai is still learning and improving, please let me know how I did by reacting below.

final pivot
#

@strong juniper will nextjs parse params in the route, e.g. [page], or will it always be a string?

strong juniperBOT
#

Let me check the knowledge base for you again. Give me one moment! :books:

#

Based on the knowledge sources provided, Next.js will not automatically parse route parameters like [page] into non-string types. The parameters will always be passed as strings.

According to the Dynamic Routes documentation:

Route Example URL params
pages/blog/[slug].js /blog/a { slug: 'a' }

This shows that the dynamic segment [slug] is passed as a string 'a'.

For catch-all routes, the parameters are passed as an array of strings:

Route Example URL params
pages/shop/[...slug].js /shop/a/b/c { slug: ['a', 'b', 'c'] }

If you need to use the parameter as a number or any other type, you'll need to parse it yourself in your component or page function. For example, if you have a [page] parameter that you want to use as a number:

export default function Page({ params }: { params: { page: string } }) {
  const pageNumber = parseInt(params.page, 10);
  // Use pageNumber as a number
}

It's important to note that in Next.js 15 and later, the params prop is a promise, so you'll need to await it:

export default async function Page({ params }: { params: Promise<{ page: string }> }) {
  const { page } = await params;
  const pageNumber = parseInt(page, 10);
  // Use pageNumber as a number
}

This approach ensures type safety and allows you to handle cases where the parameter might not be a valid number.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@final pivot Kapa.ai is still learning and improving, please let me know how I did by reacting below.

final pivot
#

@strong juniper i now only have /browse/[[...segments]] which does both the media type and the slug. how do i lay out the folder structure for the modal?

strong juniperBOT
#

Let me check the knowledge base for you again. Give me one moment! :books:

#

Based on your new routing structure with /browse/[[...segments]], we can adjust the folder structure to accommodate both the browse page and the modal. Here's how you can lay out the folder structure:

app/
├── browse/
│   ├── [[...segments]]/
│   │   └── page.tsx
│   └── @modal/
│       └── (.)[[...segments]]/
│           └── page.tsx
└── layout.tsx

In this structure:

  1. app/browse/[[...segments]]/page.tsx handles all your browse routes, including the media type and optional slug.
  2. app/browse/@modal/(.)[[...segments]]/page.tsx is the intercepting route for the modal.

The (.) in the modal folder name indicates that this route should intercept its siblings, as mentioned in the Intercepting Routes documentation:

"You can use:

  • (.) to match segments on the same level"

This structure allows you to intercept the browse route and display it as a modal when needed.

Remember to update your root layout (app/layout.tsx) to handle the @modal slot:

export default function RootLayout({
  children,
  modal
}: {
  children: React.ReactNode
  modal: React.ReactNode
}) {
  return (
    <html>
      <body>
        {children}
        {modal}
      </body>
    </html>
  )
}

In your app/browse/[[...segments]]/page.tsx and app/browse/@modal/(.)[[...segments]]/page.tsx files, you'll need to handle the segments parameter, which will be an array of strings. You can use this to determine the media type and slug as needed.

For example:

export default function BrowsePage({ params }: { params: { segments?: string[] } }) {
  const [mediaType, ...slugParts] = params.segments || [];
  const slug = slugParts.join('/');

  // Your component logic here
}
#

This structure allows you to handle all your browse routes in a single component while still providing the ability to display content in a modal when intercepted.

Parallel Routes > Modals provides more information on implementing modals using this approach.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: