How to locate this error? | Next.js | Page 1

static prism Oct 24, 2023, 5:03 PM

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I can reliably reproduce an unexpected behavior, but I don't know why it's happening. After starting my dev server the error occurs the first time I try to navigate to a route.

I start the dev server in VS Code.
server log:

> dev
> next dev

  ▲ Next.js 13.5.4
  - Local:        http://localhost:3000
  - Environments: .env.local
  - Experiments (use at your own risk):
     · serverActions

 ✓ Ready in 2.3s

I navigate to http://localhost:3000/login
server log:

 ✓ Compiled /middleware in 220ms (211 modules)
 ✓ Compiled /[locale]/login/page in 1345ms (2401 modules)

I click on a link <a href="/register">REGISTER</a> in a client component.
server log:

 ✓ Compiled /[locale]/register/page in 494ms (2412 modules)
 ⚠ Fast Refresh had to perform a full reload. Read more: https://nextjs.org/docs/messages/fast-refresh-reload

client log:

[Log] [Fast Refresh] rebuilding
[Error] Fetch API cannot load http://localhost:3000/_next/static/webpack/e5d03f6071d39f73.webpack.hot-update.json due to access control checks.
    (anonymous function) (webpack.js:1365)
[Warning] [Fast Refresh] performing full reload

Fast Refresh will perform a full reload when you edit a file that's imported by modules outside of the React rendering tree.
You might have a file which exports a React component but also exports a value that is imported by a non-React component file.
Consider migrating the non-React component export to a separate file and importing it into both files.

It is also possible the parent component of the component you edited is a class component, which disables Fast Refresh.
Fast Refresh requires at least one parent function component in your React tree.

The browser is not routed to /register. If I click on the link the second time, it works. How can I find out what is causing this behavior?

mental orchidBOT Oct 24, 2023, 5:03 PM

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

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The error message you're seeing is related to Next.js's Fast Refresh feature. Fast Refresh is a feature that gives you instantaneous feedback on edits made to your React components. It's enabled by default in all Next.js applications on 9.4 or newer.

According to the Next.js documentation (https://nextjs.org/docs/architecture/fast-refresh), Fast Refresh will fall back to doing a full reload if you edit a file that's imported by files outside of the React tree. This could be the case if you have a file which exports a React component but also exports a value that is imported by a non-React component file.

The error message also mentions that Fast Refresh requires at least one parent function component in your React tree. If the parent component of the component you edited is a class component, this could disable Fast Refresh.

To debug this issue, you could start by checking the files that are being imported by the route you're trying to navigate to. If any of these files are also being imported by non-React components, consider migrating these exports to a separate file and importing it into both files.

Also, check if the parent component of the component you edited is a class component. If it is, consider refactoring it to a function component to enable Fast Refresh.

For debugging server-side Next.js code, you can use Chrome DevTools. To do this, you need to pass the --inspect flag to the underlying Node.js process when starting your dev server. This will allow you to debug your server-side code much like debugging client-side code with Chrome DevTools. More details on this can be found in the Next.js documentation (https://nextjs.org/docs/pages/building-your-application/configuring/debugging).

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For debugging client-side code, you can use Chrome's Developer Tools. Start your development server as usual and open `<http://localhost:3000`> in Chrome. Then, open Chrome's Developer Tools and go to the Sources tab. Here, you can set breakpoints and inspect your code as it runs. More details on this can be found in the Next.js documentation (https://nextjs.org/docs/pages/building-your-application/configuring/debugging).

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

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@static prism kapa.ai is still learning and improving, please let us know how it did by reacting below

static prism Oct 24, 2023, 10:05 PM

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So far I've narrowed the issue down to this:

I can only replicate it on Safari.
It happens only with pages that haven't been compiled yet, apart from the initial page load.
I can only replicate it either by manually entering the route paths in the address field, or with an <a> element. I haven't been able to replicate it with Next.js's <Link> or useRouter hook.

static prism Oct 25, 2023, 8:31 AM

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@mental orchid check out my previous response!

mental orchidBOT Oct 25, 2023, 8:31 AM

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Let me check the knowledge base for you. One moment! :books:

#

The error message you're seeing is related to Next.js's Fast Refresh feature. Fast Refresh is a feature that gives you instantaneous feedback on edits made to your React components. It's enabled by default in all Next.js applications on 9.4 or newer.

According to the Next.js documentation (https://nextjs.org/docs/architecture/fast-refresh), Fast Refresh will fall back to doing a full reload if you edit a file that's imported by files outside of the React tree. This could be the case if you have a file which exports a React component but also exports a value that is imported by a non-React component file.

The error message also mentions that Fast Refresh requires at least one parent function component in your React tree. If the parent component of the component you edited is a class component, this could disable Fast Refresh.

To debug this issue, you could start by checking the files that are being imported by the route you're trying to navigate to. If any of these files are also being imported by non-React components, consider migrating these exports to a separate file and importing it into both files.

Also, check if the parent component of the component you edited is a class component. If it is, consider refactoring it to a function component to enable Fast Refresh.

For debugging server-side Next.js code, you can use Chrome DevTools. To do this, you need to pass the --inspect flag to the underlying Node.js process when starting your dev server. This will allow you to debug your server-side code much like debugging client-side code with Chrome DevTools. More details on this can be found in the Next.js documentation (https://nextjs.org/docs/pages/building-your-application/configuring/debugging).

#

For debugging client-side code, you can use Chrome's Developer Tools. Start your development server as usual and open `<http://localhost:3000`> in Chrome. Then, open Chrome's Developer Tools and go to the Sources tab. Here, you can set breakpoints and inspect your code as it runs. More details on this can be found in the Next.js documentation (https://nextjs.org/docs/pages/building-your-application/configuring/debugging).

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

#

@static prism kapa.ai is still learning and improving, please let us know how it did by reacting below

static prism Oct 25, 2023, 8:33 AM

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@mental orchid
So far I've narrowed the issue down to this:
I can only replicate it on Safari.
It happens only with pages that haven't been compiled yet, apart from the initial page load.
I can only replicate it either by manually entering the route paths in the address field, or with an <a> element. I haven't been able to replicate it with Next.js's <Link> or useRouter hook.

mental orchidBOT Oct 25, 2023, 8:33 AM

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Let me check the knowledge base for you. One moment! :books:

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Based on your observations, it seems like the issue might be related to how Safari handles navigation to uncompiled pages when using <a> elements or manually entering the route paths.

Next.js's <Link> component and useRouter hook handle navigation differently than traditional <a> elements. They use client-side navigation, which means that the browser doesn't do a full page refresh when navigating between pages in your Next.js app. This is also known as "soft" navigation, and it preserves React and browser state, and there is no full page reload (source (https://nextjs.org/docs/app/building-your-application/routing/linking-and-navigating)).

On the other hand, <a> elements and manually entering the route paths in the address field trigger a full page refresh (hard navigation), which might cause issues if the page hasn't been compiled yet.

As a workaround, you could try to use Next.js's <Link> component or useRouter hook for navigation, as these seem to work correctly based on your observations.

For debugging this issue further, you might want to look into how Safari handles navigation and page loading, especially for pages that haven't been compiled yet. Unfortunately, the provided extracts do not contain specific information on debugging issues on Safari.

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

#

@static prism kapa.ai is still learning and improving, please let us know how it did by reacting below

static prism Oct 25, 2023, 11:05 AM

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@mental orchid I'm writing instructions for reproducing the issue. Help me to use correct terms. What do you call the process of manually entering a new path for the same domain that the currently loaded page is in?

mental orchidBOT Oct 25, 2023, 11:05 AM

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Let me check the knowledge base for you. One moment! :books:

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The process of manually entering a new path for the same domain that the currently loaded page is in is typically referred to as "manual URL navigation" or "manual route change". This involves directly typing a new path into the browser's address bar and pressing enter to navigate to the new path. This is different from clicking on a link or button within the webpage to navigate to a new path, which is typically referred to as "link navigation" or "programmatic navigation".

#How to locate this error?

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

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

For debugging this issue further, you might want to look into how Safari handles navigation and page loading, especially for pages that haven't been compiled yet. Unfortunately, the provided extracts do not contain specific information on debugging issues on Safari.

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

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