With htmx 2.0.1, I get the following error when trying to import htmx from "htmx.org";:

File './node_modules/htmx.org/dist/htmx.d.ts' is not a module.ts(2306)

I believe this is happening because the htmx.d.ts file should include export default htmx;.
Adding this line manually in the file fixes the issue.

I will create a PR for this.