Is there a workaround for unresolved symlink requirements when using npm link?

Creating an NPM package often involves using the following:

npm link

This allows for making modifications to a package called <myPackage> during development without constantly having to publish and unpublish! Developers can make changes locally and immediately see their effects.

To install it in a project, use:

npm link <myPackage>

While this method is beneficial, there can be an issue if <myPackgage> requires a path.

In such cases, it will reference the true location of <myPackage> as __dirname instead of the expected symlink location, which should be local to the project like a typical node_module.

So far, I have come up with a solution that works well for my specific scenario:

module.exports = {
  loadImage: function (filename) {
    var img
    if (typeof window !== 'undefined' && ({}).toString.call(window) === '[object Window]') {
      try {
        img = require('../../src/images/' + filename)
      } catch (e) {
        // For development purposes only
        img = require('./template/src/images/' + filename)
      }
    } else {
      img = '/assets/images/' + filename
    }
    return img
  }
}

However, this approach may result in warning messages in the browser.

Although I understand the cause of the problem, ideally, I would prefer to suppress the error message.

Answer №1

I have a feeling this question may not be very popular, so here's an interesting solution tailored specifically for NPM Package development that avoids any warning messages.

Below are some code snippets exported by modules.exports that can be easily imported into your application. One of the methods is loadImage, which includes a fallback for the require(path):

module.exports = {
  loadImage: function (filename) {
    if (typeof window !== 'undefined' && ({}).toString.call(window) === '[object Window]') {
      return (process.env.NPM_PACKAGE_DEV && require('./template/src/images/' + filename) ||
            require('./template/src/images/' + filename))
    } else {
      return '/assets/images/' + filename
    }
  },
  isBrowser: function () {
    return (typeof window !== 'undefined && ({}).toString.call(window) === '[object Window]')
  }
}

The great thing about this setup is that you can set the NPM_PACKAGE_DEV using a simple command and then start the node server (using osx terminal syntax):

export NPM_PACKAGE_DEV=1 && node server.js

If the NPM_PACKAGE_DEV is not specified, the require() will default to the path relative to the project's node_modules directory.

This could be useful for someone facing a similar challenge in the future!

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