Resolving Node.js Loader Error: Cannot find module 'example.json' When Running Babel Transpiled Code

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While it might seem like an easy fix—after all, you’re importing a file that exists—Babel's setup does not automatically manage these types of dependencies. Let's dive into the underlying reasons and explore alternative solutions to help you effectively include JSON files in your project.

Why Does This Error Occur?

When using Babel, the compiler is designed to transpile JavaScript files but does not process any files that are not in that language, including JSON. Hence, when you attempt to require or import a JSON file, Babel ignores it during the transpilation process, leading to the absence of that file in your output directory.

Solutions to Include JSON Files in Your Build

To resolve this issue, you have several alternatives. Here are three effective methods to manage JSON file imports while using Babel:

1. Using a Bundler (Webpack or Gulp)

A more robust solution involves using a module bundler like WebPack or Gulp. These tools are capable of not only bundling your JavaScript files but also handling non-JS files like JSONs. Here's how you could set it up:

Create a configuration file for the bundler to specify how non-JS files should be processed.

Use plugins that allow the copying or transformation of JSON files.

2. Using Babel's --copy-files Command

If you prefer to stick with Babel without opting for a bundler, you can take advantage of Babel's command-line option to --copy-files. When you run your build command, include this flag, which tells Babel to copy files other than JavaScript:

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You can also combine this with --ignore patterns to skip files you don’t want to include in your build.

3. Employing the shx Package

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

This command ensures that all JSON files in the source directory are copied over to the build directory, solving the module not found issue.

Conclusion

Understanding how Babel interacts with various file types will vastly improve your workflow and resolve frustrating build errors. Happy coding!