Importing diff2html via rails Importmap causes “TypeError: n.Template is not a constructor”

[doguto]

Description

When using diff2html via Rails Importmap, a runtime error occurs when importing the library.

Environment

Rails: 7.x (using Importmap)

diff2html: 3.4.52

Browser: Chrome

Importmap configuration

# config/importmap.rb
pin "diff2html", to: "https://ga.jspm.io/npm:diff2html@3.4.52/lib-esm/diff2html.js"

usage

// only import
import * as Diff2Html from "diff2html"

Error message

The following error appears in the browser console:

diff2html-templates.js:3 Uncaught TypeError: n.Template is not a constructor
    at diff2html-templates.js:3:41
    at (anonymous)

What I’ve tried

Tested with both jspm.io and jsDelivr CDNs → same error

Tried older versions (e.g., 2.8.0) → no error caused