How shall I specify adress of the 'xlsx' module?

URL of experiment: Pavlovia

I need to import this module because I’m forced to use xlsx sheet in module for color randomizing. But I can not figure out how usual js libs are imported in this framework. I’ve seen that some of them are imported from ./libs/psychojs-2021.2.3.js but there are unsurprisingly no xlsx modules inside of it.

Or otherwise may be you know how can I import xlsx tables in the code. I’ve been trying TrialHandler utilite using but it gave me a strange result and I couldn’t ascertain how it works.