Скачать или смотреть Understanding the Difference Between Development and Production in Next.js with Vercel

Discover how to effectively manage your Next.js app's transition from `development` to `production` on Vercel, including critical tips and best practices.
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A Guide to Managing Next.js Applications on Vercel: Development vs. Production

If you’ve been developing web applications using Next.js, you might have encountered issues when deploying your app to Vercel, the preferred platform for hosting Next.js applications. Many developers face the challenge of their application working perfectly during development, but not functioning properly once it’s deployed. Let’s explore a common issue and how to resolve it effectively, ensuring your app transitions seamlessly from development to production.

The Problem

It’s not uncommon to see errors when moving your Next.js application to Vercel. For instance, a user built a basic movie database app utilizing Firebase and Next.js API endpoints. While the app runs smoothly in a local development environment, it fails to function properly once uploaded to Vercel.

The core of the issue seems to arise from hardcoding the API URL in the application's code. The developer used http://localhost:3000 to make API calls, which is perfectly fine during development. However, in a production environment, this approach breaks due to the different server context.

Solutions for Troubleshooting Your Next.js App

Here's a step-by-step breakdown of the effective solutions to ensure that your Next.js application communicates properly with your API endpoints both in development and production.

1. Avoid Hardcoding URLs

When referencing your API in Next.js, you should not hardcode URLs that point to your local server. Instead, you can simplify your API calls as follows:

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This change allows Next.js to use the same origin for API requests, which is necessary in both development and production settings.

2. Refactor API Calls in getInitialProps

Your application's getInitialProps function is designed to fetch data on the server-side when the page is rendered. Since you are making API calls within this function, it is best to directly access your database or cloud service instead of relying on the API.

Here’s how to modify your getInitialProps by calling a function that interacts directly with Firebase:

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3. Directly Fetch from Firebase

Move your database call logic completely out of the API and into your data-fetching functions. In this case, the getMovies function could be restructured to handle fetching directly from Firebase:

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

This way, your application is not dependent on an intermediate API call that complicates the data fetching process, especially during the switch to production.

Conclusion

By adhering to these strategies, your Next.js application will handle both local development and production environments more effectively. Avoid hardcoding URLs, adjust your data fetching techniques, and directly interface with your database where necessary. This will greatly minimize the issues you’ll encounter when deploying your app to platforms like Vercel.

By following these guidelines, you not only ensure that your app runs smoothly but also enhance your development workflow, leading to efficient debugging and a better overall user experience.

Happy coding!