How does jQuery’s "on" work?

Question

I’m doing some tests, and, I have some custom events on the platform I use, however, the window.addeventlistener does not work according to the on() of jQuery.

the event I use, let’s assume that the name is shoppingCartUpdated, it is triggered through the window.

As I do this in jQuery, it works normally

$(window).on('shoppingCartUpdated', function(e){
    console.log(e);
})

However, with addeventlistener, no.

window.addEventListener('shoppingCartUpdated', function(e){
   console.log(e);
});

I know they work differently, because otherwise jQuery’s people wouldn’t create the on. But, I’ve tried some ways to look at the source code of jQuery and I don’t quite understand how it works. It is possible to reproduce the same effect?

When I say "work", I mean that with jQuery I printed the console.log, with addEventListner no.