Скачать или смотреть Using Server Variables in Next.js for Development and Production Environments

Learn how to effectively manage server variables in Next.js to seamlessly switch between development and production environments. Discover practical steps to set up environment-specific configurations.
---
This video is based on the question https://stackoverflow.com/q/64989514/ asked by the user 'bradrice' ( https://stackoverflow.com/u/568352/ ) and on the answer https://stackoverflow.com/a/64990326/ provided by the user '83C10' ( https://stackoverflow.com/u/6095075/ ) 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, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: use server variables in build for development and production

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.
---
Managing Server Variables in Next.js for Development and Production

When working on a Next.js project, one common challenge developers face is managing server variables effectively for both development and production environments. You might find yourself asking: How can you utilize different environment variables to ensure smooth transitions between your local setup and live server?

In this post, we will walk through the problem and provide a clear, step-by-step solution for managing your API server variables in Next.js, ensuring that you can develop locally without hassle and deploy successfully to a production system.

Understanding the Problem

You've set up a variable in your env.development file like this:

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

This works perfectly during local development when you run npm run dev. However, when building for production, switching to npm run build brings up errors indicating there are incomplete or relative paths.

To fix this, you made an attempt to configure variables in the next.config.js, but you realized this method requires hardcoding the API server for each environment, leading to:

Increased manual work

Higher risk of errors during deployment

Lack of flexibility for different deployment stages

What You Need

The ideal solution is to set up different configuration files within your project that handle development and production environments without the need to manually change values every time.

The Solution

Next.js simplifies this process by allowing separate environment variable files and, with a few simple configurations, you can ease your development process and maintain consistent behavior in production.

Step-by-Step Guide

Create Environment Variable Files:

In your project root directory, create the following files:

.env.development

.env.production

These files will hold your environment-specific variables.

Configure Your .env Files:

Fill in each file with the appropriate server variable, ensuring you prepend them with NEXT_PUBLIC_ to expose them to the browser. For example:

.env.development

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

.env.production

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

Reference the Variables in Your Code:

Wherever you need to use the API server variable in your code, reference it using:

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

This ensures that your API calls dynamically adapt to the environment you're working in.

Running Your Application:

For Development: Run your application using next dev, which loads the .env.development file.

For Production: Execute next build and then next start, which reads from .env.production.

Benefits of Using This Approach

Automatic Configuration Loading: Next.js automatically loads the appropriate environment variables based on the command you use (next dev vs. next build).

Less Manual Process: You won't need to touch your configurations or change hardcoded values, reducing the potential for human errors.

Streamlined Deployment: This method creates a smoother workflow as you transition from development to production.

Conclusion

By following these straightforward steps, you can effectively manage your server variables in Next.js, ensuring that your local development mirrors your production environment accurately without the need for cumbersome manual changes.

Give this approach a try, and watch your development process become more efficient and less error-prone!

Feel free to reach out with any questions or comments regarding this setup and happy coding!