ReferenceError when used from the browser

[triceo]

When used like so in my HTML page:

<script src="https://cdn.jsdelivr.net/npm/chart.js@4.1.2"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-watermark@2.0.1"></script>

I get:

This is on Chrome 112.0.5615.165.
Surprisingly, the samples work, even though they do reference module as well.

[triceo]

It works as expected when the watermark plugin is loaded from a relative location ("../").

The samples do it like that, but I do think it's strange - why would people be expected to bundle the plugin in their own application, as opposed to just loading it remotely?