Javascript plugins question

[USwampertor]

Hi everyone! I wanted to generate a plugin for armorpaint with javascript, but if I want to add a npm module to the file, armorpaint cannot load it as it says "cannot use import statement outside a module", what am I doing wrong? is there a special way to integrate modules and external libraries? Even trying to just include another js file that has nothing inside but a simple function is impossible.

@luboslenco Is there a way to create extensions for armorpaint?