How to bundle sortablejs in ASP.NET Core?

Question

I am writing a Typescript file that has this import statement:

import Sortable from "sortablejs";

I then encountered the following error when I run the web app:

Failed to resolve module specifier "sortablejs". Relative references must start with either "/", "./", or "../".

To solve it, in my Razor page, I included the following code:

<script type="importmap">
    {
      "imports": {
        "sortablejs": "https://cdn.skypack.dev/[email protected]"
      }
    }
</script>

It works fine but I read that importmap is not supported by Safari. Thus, I am looking for an alternative solution.

Presently I am using WebOptimizer to bundle my files and I would like to continue using that instead of Webpack or others.