CSS: Pseudo Class
What is Pseudo-Class
Pseudo-Class means the state of an element, such as in-focus, mouse hovering, clicked, checkbox checked, empty content, language spec, first child, etc.
The idea is like a fake Class Attribute to indicate state.
Example
a:link { text-decoration: none; } a:visited { text-decoration: none; } a:hover { background-color: pink; }