- Module works without generating any modify in the prevailing PrestaShop file so that existing customization and theme alter tend not to have an effect on. The same trick can be done with just the initial line, but the benefit of defining several outlines is that you get a visible https://www.presta-addons-modules.com/en/free-modules/prestashop-preloader-page-loading-image-page-loading-animation-preloading-screen-loading-page.html