Selector Type Efficiency There are four main types of selectors in CSS–ID, class, tag and universal. IDs are unique elements denoted by the hash, like our old friend #current .

selectors specificity. CSS Specificity: The site provides a unique infographic with icons representing various combinations of selectors along with a legend, an About section, and links to the CSS Dev ...

Editor’s note: This How To assumes a basic understanding of HTML. Along with HTML and JavaScript, CSS forms the foundation of the open Web. These three technologies power just about every ...