javascript export variable or getter but returning value?

So I'm working with some export in js and do not understand the way they interact...

I have those two files :

imported file

export var a = 0;

// getter on a
export function A() {
    return a;
}

// a custom evetn from a library, works on a trigger like usual js buttons
// triggers on a command base
register("command", (event) => {
    a = 1;
}).SetCriteria("test");

index file

import { a, A } from "./importedFile.js";

// a custom event from a library, works on a trigger like usual js buttons
// triggers on a clock base
register("tick", (event) => {
    console.log(a);
    console.log(A());
})

However whatever I do on the command trigger (that does fire, I've tested it) I do not get any output on the index file... It stays at zero

Any idea why, something I've missed on the way exports works?

Thanks :)