::before ::after CSS-Tricks - CSS-Tricks

before So in Selectors Level 3, they decided to change the syntax for :before to ::before (and for legacy reasons, we can still use :before , but it is

CSS ::before selector The ::before selector CSS pseudo-element, is used to add the same content multiple times before the content of other before after before is a generated content element that represents a styleable abstract first child of the respective element The