Скачать или смотреть How to Handle Server-Side Errors in Your Next.js Login Component

Learn how to effectively manage server-side errors in your login component using Next.js and Zod. Display meaningful error messages to improve user experience!
---
This video is based on the question https://stackoverflow.com/q/78107470/ asked by the user 'Anuj Todankar' ( https://stackoverflow.com/u/15739154/ ) and on the answer https://stackoverflow.com/a/78123596/ provided by the user 'Anuj Todankar' ( https://stackoverflow.com/u/15739154/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, comments, revision history etc. For example, the original title of the Question was: Next: App router login component is not showing server side errors

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Handling Server-Side Errors in Next.js Login Components

Managing user authentication flow in a web application is crucial, especially when it comes to login forms. In many cases, developers face an issue where server-side errors can escape notice due to component re-renders on login attempts. So, how can you catch those errors and ensure they’re visible to the user? In this guide, we’ll dive into solving this problem using Next.js with Zod for form validation and NextAuth for authentication.

The Problem

Your application has a login form where users input their email and password. However, when the server responds with an error (such as invalid credentials or server issues), it may not be displayed to the user because the component re-renders. This means valuable feedback about what went wrong gets lost.

Example Scenario

Imagine a user tries to log in but enters the wrong password. Instead of receiving an error message like “Invalid password”, they might just be redirected or see a blank form again, leading to confusion and frustration.

The Solution

To efficiently handle server-side errors in Next.js, we need to structure our authentication logic to capture those errors and display them appropriately. Here’s a step-by-step breakdown of how you can do this.

1. Update Your NextAuth Options

In order to catch server errors, modify your authorize method within CredentialProvider. Ensure you check the response status and throw an error if necessary. Here’s how you can modify your code:

[[See Video to Reveal this Text or Code Snippet]]

2. Handle Errors in Your Form Submission

In your form submission function, you can catch the thrown errors and display them in your UI. Here’s how it’s done:

[[See Video to Reveal this Text or Code Snippet]]

3. Displaying Error Messages

To inform users about what went wrong, you can conditionally render the error message within your component. For instance:

[[See Video to Reveal this Text or Code Snippet]]

4. Conclusion

By properly handling server-side errors during authentication in a Next.js application, you enhance user experience significantly. Users are informed about what went wrong, leading to less frustration and more successful login attempts.

Key Takeaways:

Modify the authorize method to check for response status and throw errors accordingly.

Handle errors in your form submission function, setting an error state.

Conditionally render error messages in your UI.

Implementing these strategies will allow your application to handle server-side errors gracefully, providing clearer feedback and maintaining user trust throughout their login experience.