Custom HTML Head, external JavaScript libraries

[Lisztes]

According to the documentation one can reference external JavaScript libraries in a Custom HTML Head.
I reference the makerjs JavaScript library like this:

<script src="http://maker.js.org/target/js/browser.maker.js" type="text/javascript"></script>

To use this library one have to write a JavaScript code, which can be run only in mo.iframe(). This code does not work because names in the global JavaScript namespace can not be seen in mo.iframe().

If I place the makerjs library reference in to mo.iframe(), the code works, but in the browser console multiple error messages appear:
Uncaught ResizeObserver loop completed with undelivered notifications.

What is the proper way of using external JavaScript libraries?

[mscolnick]

You can maybe try using anywidget to right your javascript: https://anywidget.dev/