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Error handling is an essential aspect of building robust web applications, and Next.js provides a flexible and powerful way to implement custom error handling strategies. By customizing error pages and handling different types of errors, you can improve user experience and troubleshoot issues effectively.

In Next.js, you can customize error handling at both the application level and the page level. At the application level, you can create custom error pages using special files in the `pages` directory, such as `_error.js` for handling 404 errors and `_app.js` for global error handling. These files allow you to define how Next.js renders error pages and provides valuable information to users when errors occur.

Additionally, you can handle errors within individual pages by implementing error handling functions like `getServerSideProps`, `getStaticProps`, or `getInitialProps`. These functions allow you to catch errors during data fetching and rendering and provide fallback strategies or error messages to users.

When implementing custom error handling in Next.js, consider the following best practices:
1. Provide informative error messages to users to help them understand what went wrong.
2. Use HTTP status codes appropriately to indicate the nature of the error (e.g., 404 for not found, 500 for server errors).
3. Implement fallback strategies or alternative content to maintain a smooth user experience in case of errors.
4. Log errors for debugging purposes to identify and resolve issues efficiently.

By following these best practices and leveraging Next.js's built-in error handling features, you can create resilient web applications that handle errors gracefully and provide a seamless user experience.

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