Скачать или смотреть Mastering npm link: Using Multiple Local Packages in One Project

Learn how to use multiple local packages in one project with `npm link`. Troubleshoot common issues and streamline your development process.
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Mastering npm link: Using Multiple Local Packages in One Project

If you're working on a project that uses multiple local packages, you may have encountered difficulty when trying to set them up with npm link. This feature is incredibly useful as it allows you to develop multiple packages simultaneously and see changes in real-time. However, if you're trying to link more than one package, things can get a bit tricky. In this post, we'll walk through a common issue regarding npm link and how to resolve it effectively.

The Problem with npm link

A user recently reported a common confusion: they successfully linked their first local package using npm link <my-package-1>, which created a symbolic link in the node_modules folder of their project. However, when they tried to link their second package with npm link <my-package-2>, they noticed that the symbolic link to the first package was removed. This led to some frustration as they couldn't figure out how to have both packages linked at the same time.

Key Observations:

Linking the first package works as expected.

Attempting to link the second package removes the link to the first.

The symbolic links point to the package folders, not to the global node_modules.

This behavior can be puzzling, but fear not! There is a straightforward solution to this issue.

Solution: Link Multiple Packages Simultaneously

Instead of linking your packages one at a time, you can link multiple packages in one command. Here’s how to do it:

Step-by-Step Guide

Link Both Packages at Once: Use the following command to link both local packages in your project:

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

By placing the names of both packages in the same command, you create symbolic links for each of them in your project's node_modules directory.

Verify the Links: After executing the command, you can run ls in your node_modules folder to ensure that both symbolic links have been created successfully.

Understanding Symbolic Links

Symbolic links are essential in local development as they allow you to use packages without having to publish them to a package registry. The beauty of using npm link is that any changes made to your local package code are immediately available in your project.

Conclusion

Linking multiple local packages using npm link can significantly enhance your development workflow by allowing you to work on several packages concurrently. The key takeaway is that you can link multiple packages in one go, thus avoiding the issue of one link overriding the other.

By following the steps outlined in this post, you should have a seamless experience using npm link across multiple packages in your project.

Happy coding! If you have any further issues or questions, feel free to reach out in the comments below.