Global scope for Javascript variables in Storyline

For anyone reading this in the future : In addition to what Math spotted (the "go to slide" instruction that prevents previous javascript call) many of my difficulties here were because I had several errors in my script that immediatly disables all javascript in the project. The slightest missing ";" at an end of line can cause this.

In my case, I used also "let" declaration for a temp variable I wanted to declare & initialize several times in the same javascript call. At the very moment a 2nd "let" line for the same variable appeared in my script, nothing worked anymore.

I didn't yet sort the "Storyline goes too quick to the next slide" problem properly : actually I stop the chronology of the current slide, and when the user clicks "next" button I call my js fucntions and let the slide carry on : it ends 1 second later, with automatic go to next slide. And this seems enough for letting js call to be done.

I have a last question @Math : can your solution work with a 4D array as mine ? I would like to try to initialize my array from within a javascript inside my storyline project rather than from globaScript.js file, that would prevent the WebObjectURL value to change each time the content of my array has changed.