[mavsman]

It seems like that was just a way of showing how you can use import statements and other things in that setup without needing to set it up.

[lastmjs]

Exactly. You don't need any of that if you don't want it. You can write everything in your HTML file if you want, put your script in a script element (though there will be no compilation of the script element, if you want that it needs to be in its own file).