What steps should I take to create a plugin for a library if defining it as a peerDependency does not provide a specific implementation for me to work with?

Requirements for My Plugin:

I'm currently in the process of developing a new plugin that is dependent on popularLibrary.js. Here are the key points about my plugin:

  • It will not function properly if popularLibrary.js is missing.
  • It is designed to work specifically with version v1.x.x of popularLibrary.js.
  • My plugin must be able to operate seamlessly when included as a dependency in a project that utilizes popularLibrary.js.
  • Similarly, it should also work effectively when packaged alongside popularLibrary.js.

For example purposes, consider the following setup:

<script src="https://some-cdn.com/popularLibrary.js"></script>
<script src="https://some-cdn.com/myMagicalPlugin.js"></script>

Challenges I Am Facing:

  • I have encountered difficulties when specifying popularLibrary.js as a peerDependency, as it no longer gets downloaded during the npm install process. How can I continue the development of my plugin, which relies on importing and utilizing features provided by popularLibrary.js?
  • Considering that not all users incorporate a build step into their workflow, what happens if someone manually includes minified sources for both popularLibrary.js and myMagicalPlugin.js? How does the peerDependency resolution take place in this scenario? Are there any additional steps or modifications required in either library to account for this situation?
javascriptnpmpeer-dependencies

Answer №1

It has been some time since I initially posed this question. I eventually included that identical peerDependency as a devDependency, as it is essential for the development and testing of the application.

Ideally, you should adhere to a contract/interface to separate the plugin from the main library as much as possible. As an illustration, I have devised two WebPack scripts.

Script 1: Packages the library and utilizes the excludes key to exclude any direct dependencies on the main library (best avoided if feasible, i.e., Decoupled)

Script 2: Intended for a development application, utilizes the primary library, importing the plugin directly from the source. Utilized alongside webpack-dev-server for development/testing.

Employ WebPackBundleAnalyzer to ensure that you are not unintentionally bundling peerDeps

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