A good preloader should be visually pleasing and present progress visually by means of very simple animations or great images. A nested & selects the father or mother component in both SASS and fewer. It's not just for pseudo aspects, it can be employed with any type of selector. [nine]. https://www.presta-addons-modules.com/en/front-office/prestashop-twitter-feeds-widget-for-selected-categories-and-languages.html