can't get the gridextensions loaded in my Prestashop 8.x module

I'm building a modern module that uses a grid in the admin part. (I use a Docker container as environment) Can someone help me out as when I compile my index.js with "npm run build" it compiles the output, but doesn't load in the gridextensions?!

I'm kind of newbie here as well as not a seasoned prestashop developer, so please bare with me ;-)

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My index.js for the gridextensions to be compiled with npm:

const { $ } = window

$(() => {
 
  const grid = new window.prestashop.component.Grid('eventGrid')

  grid.addExtension(new window.prestashop.component.GridExtensions.SortingExtension());
  grid.addExtension(new window.prestashop.component.GridExtensions.ReloadListActionExtension());
  grid.addExtension(new window.prestashop.component.GridExtensions.LinkRowActionExtension());
  grid.addExtension(new window.prestashop.component.GridExtensions.SubmitRowActionExtension());
  grid.addExtension(new window.prestashop.component.GridExtensions.SubmitBulkExtension());
  grid.addExtension(new window.prestashop.component.GridExtensions.SubmitGridExtension());
  grid.addExtension(new window.prestashop.component.GridExtensions.PositionExtension());
  grid.addExtension(new window.prestashop.component.GridExtensions.FiltersResetExtension());
  grid.addExtension(new window.prestashop.component.GridExtensions.AsyncToggleColumnExtension());
  grid.addExtension(new window.prestashop.component.GridExtensions.ColumnTogglingExtension());
  grid.addExtension(new window.prestashop.component.GridExtensions.BulkActionCheckboxExtension());
  grid.addExtension(new window.prestashop.component.GridExtensions.BulkActionDropdownExtension());
  grid.addExtension(new window.prestashop.component.GridExtensions.BulkActionSubmitExtension());
  grid.addExtension(new window.prestashop.component.GridExtensions.BulkActionResetExtension());
});

Had the same problem.

const universGrid = new window.prestashop.component.Grid('TdpUnivers');
const gridExtensions = window.prestashop.component.GridExtensions;

universGrid.addExtension(new gridExtensions.ReloadListExtension());

This actually works in 8.2.0.

Hope this helps!