Is there any apprach to resolve a package from umd file?

[MrKou47]

Hi guys, I have noticed that Sandpack provides an externalResources option to load external scripts. How can I configure a global variable like webpack externals so that Sandpack does not load this package from the npm registry?

Consider a basic use case:
In a vanilla template, I would like to inject the global React variable via a CDN like jsdelivr:

<script src="//cdnjs.cloudflare.com/ajax/libs/react/16.2.0/umd/react.production.min.js"></script>

When writing import React, { useEffect } from 'react' in files, Sandpack should prevent loading the React package twice.

One possible solution is to enhance the externalResources option as follows:

type IExternalResources = {
  external?: {
    [key: string]: string
  };
  url: string;
}[]