Скачать или смотреть How to Fix Module Not Found Error Related to fs in ReactJS with Webpack 5

Learn how to resolve the 'Module not found: Error: Can't resolve "fs"' error in your ReactJS applications using Webpack 5, with a simple step-by-step guide.
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Resolving the Module Not Found Error in ReactJS

If you're working on a ReactJS application and using Webpack for module bundling, you might find yourself running into a perplexing error:

Module not found: Error: Can't resolve 'fs' in 'project/reactapp/node_modules/sass'

This issue can be quite frustrating, especially when you're trying to compile your application on localhost. In this guide, we will explore the causes of this error and provide a simple solution to get your React app running smoothly again.

Understanding the Problem

The error message indicates that Webpack is unable to locate the fs (file system) module within the sass package. This problem commonly occurs when using libraries that are not directly compatible with certain environments, such as web browsers where the fs module is not available.

Step-by-Step Solution

Here’s how you can resolve the issue efficiently:

Step 1: Locate the sass Package

First, you need to navigate to the sass package within your project's node_modules. This package is typically located in two main areas:

Global Location: Here you will replace username with your actual username in the path below:

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

Local Location: The second instance of the sass package is within your React app directory:

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

Step 2: Modify the package.json

For each of these package.json files you located in the previous step, you need to add a specific configuration option to instruct Webpack to ignore the fs module.

Open the package.json located in the global sass package.

Add the following block of code:

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

Repeat the same process for the package.json found in your React app’s sass folder.

Step 3: Save and Recompile

After making these modifications, save the changes to both package.json files. Once you've done that, go back and try recompiling your React application on localhost. The error should now be resolved, and your app should compile successfully.

Conclusion

Fixing the Module not found error involving the fs module is a straightforward task with a few simple modifications to the sass package's package.json. By following these steps, you can overcome this obstacle and continue developing your ReactJS application without further interruptions.

If you encounter other issues or need further assistance, don’t hesitate to seek help from the community or reach out for expert guidance.

Happy coding!