title
Pseudo

Pseudo Selectors

Pseudo selectors provide a way to target elements using pseudo classes or pseudo elements.

Structural Pseudo Classes

Structural Pseudo classes offer a way to target elements based on their position.

Class	Description
`:root`	Root of the document. In the context of HTML documents, this would be `html` tag at the top. It could mean different elements in other documents such as XML or SVG.
`:only-child`	An element that is the only child of its parent element.
`:first-child`	First child of a parent.
`:last-child`	Last child of a parent element.
`:nth-child(n)`	n-th child of its parent.
`:nth-last-child(n)`	n-th child from the last child. The reverse of `:nth-child`.
`:only-of-type`	The only element of the type within its siblings with other types.
`:first-of-type`	The first element of the type among its siblings.
`:last-of-type`	The last element of the type among its siblings.
`:nth-of-type(n)`	n-th sibling of the same type.
`:nth-last-of-type(n)`	n-th sibling of the same type from the last one. The reverse of `:nth-of-type`.
`:empty`	An element without any child elements.

UI state pseudo classes offer a way to target elements based on their current state.

Class	Description
`:link`	Unvisited link elements.
`:visited`	A link visited already.
`:hover`	An element over which mouse pointer is hovering.
`:active`	An element on which mouse pointer has been clicked, but not yet released.
`:focus`	An element that has focus. Important for accessibility, for example, while using `tab` key for navigation.
`:enabled`	An element that is in enabled state.
`:disabled`	An element that has been disabled.
`:checked`	A selected Checkbox or Radio button.

Pseudo elements on the other hand, are dynamically generated elements or elements at a special place.

Selector	Description
`::first-line`	First line of an element, usually a container or paragraph.
`::first-letter`	A letter of an element. Widely used for styling drop-caps.
`::before`	A dynamic element created with content of its own before the actual element.
`::after`	A dynamic element created with content of its own after the actual element.

Additional information can be found on below references.