What is the best way to integrate one JavaScript library into another using npm?

Currently, I'm in the process of developing an Angular library that incorporates the vtk.js library. To ensure compatibility, I included vtk.js as a peer dependency. However, upon installing my custom package, a warning prompts users to also install vtk.js separately.

Is there a technique available to embed the vtk.js package within my Angular package during packaging?

Answer №1

When it comes to expressing dependencies for your library, there are a couple of ways to do so (technically three, but let's focus on the main two for now).

  1. peerDependencies - This type of dependency is ideal when:
  • Your library specifically requires a certain version of another library.
  • Your library may encounter conflicts if multiple versions of the same dependency exist in the node_modules folder due to transitive dependencies.
  • You want developers using your library to have control over which version of the dependency they choose.

It's worth noting that peerDependencies won't be automatically installed; instead, it will notify users of your library about any missing or incompatible dependencies.

2.dependencies - If you're not concerned about the scenarios mentioned above, simply list your dependencies here. Including something like vtk.js as a dependency ensures it will be automatically installed for anyone using your library.

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