How to Use Output Standalone in Next.js for Independent Builds

In Next.js, you can enable output: 'standalone' in your next.config.js to create a self-contained build folder that includes all necessary files to run your app independently. This is useful for deploying your app without needing to install dependencies separately.

Syntax

To use the standalone output in Next.js, add the output: 'standalone' option inside the next.config.js file's export object. This tells Next.js to bundle your app and its dependencies into a single folder.

• output: The key to specify the build output type.
• 'standalone': The value that creates a self-contained build folder.

javascript

module.exports = {
  output: 'standalone',
};

Example

This example shows a minimal next.config.js with standalone output enabled. After running next build, Next.js creates a .next/standalone folder containing your app and all dependencies. You can then run your app from this folder without installing node_modules.

javascript

/* next.config.js */
module.exports = {
  output: 'standalone',
};

Output

Build completed. Standalone output created in .next/standalone folder.

Common Pitfalls

Common mistakes when using output: 'standalone' include:

• Not running next build after setting the option, so the standalone folder is not created.
• Trying to run the app from the root folder instead of the .next/standalone folder.
• Forgetting to copy the package.json and next.config.js files if deploying the standalone folder elsewhere.

Always run node server.js inside the standalone folder to start your app.

bash

/* Wrong: Running app from root without standalone build */
// This will fail if node_modules are missing
node server.js

/* Right: Run inside standalone folder */
cd .next/standalone
node server.js

Quick Reference

Option	Description
output: 'standalone'	Creates a self-contained build folder with all dependencies.
next build	Generates the standalone folder after setting the option.
.next/standalone	Folder containing the standalone app ready to run.
node server.js	Command to start the app inside the standalone folder.

Key Takeaways

Set output: 'standalone' in next.config.js to create a self-contained build.

Run next build to generate the standalone folder with all dependencies.

Run your app from the .next/standalone folder using node server.js.

Standalone output helps deploy apps without installing node_modules separately.

Remember to copy necessary config files if deploying the standalone folder elsewhere.