Pseudo glossary terms
Table of Contents
A
:active
Matches when an item is being activated by the user, for example clicked on. A ‘user action pseudo-class’.
:any-link
Matches both the :link and :visited states of a link. A ‘location pseudo-class’.
::after
Inserts a stylable element appearing after the originating element's actual content, if used with the content property with a value other than none. A ‘pseudo-element’.
:autofill
Matches when an <input> has been auto-filled by the browser. A ‘input pseudo-class’.
B
::before
Inserts a stylable element appearing before the originating element's actual content, if used with the content property with a value other than none. A ‘pseudo-element’.
:blank
Matches an <input> element whose input value is empty. A ‘input pseudo-class’.
C
:checked
Matches a radio button or checkbox in the selected state. A ‘input pseudo-class’.
:current
Matches the element, or an ancestor of the element, that is currently being displayed. A ‘time-dimensional pseudo-class’.
D
:default
Matches the one or more UI elements that are the default among a set of similar elements. A ‘input pseudo-class’.
:dir
Select an element based on its directionality, value of the HTML dir attribute or CSS direction property. A ‘linguistic pseudo-class’.
:disabled
Matches user interface elements that are in a disabled state. A ‘input pseudo-class’.
E
:empty
Matches an element that has no children except optionally white space. A ‘three-structural pseudo-class’.
:enabled
Matches user interface elements that are in an enabled state. A ‘input pseudo-class’.
F
:first
In Paged Media, matches the first page. A ‘three-structural pseudo-class’.
:first-child
Matches an element that is first among its siblings. A ‘three-structural pseudo-class’.
::first-letter
Matches the first letter of the element. A ‘pseudo-element’.
::first-line
Matches the first line of the containing element. A ‘pseudo-element’.
:first-of-type
Matches an element that is first of a certain type among its siblings. A ‘three-structural pseudo-class’.
:focus
Matches when an element has focus. A ‘user action pseudo-class’.
:focus-visible
Matches when an element has focus and the focus should be visible to the user. A ‘user action pseudo-class’.
:focus-within
Matches an element with focus plus an element with a descendent that has focus. A ‘user action pseudo-class’.
:future
Matches the elements after the current element. A ‘time-dimensional pseudo-class’.
G
::grammar-error
Matches a portion of the document containing a grammar error as flagged by the browser. A ‘pseudo-element’.
H
:hover
Matches when the user hovers over an element. A ‘user action pseudo-class’.
I
:in-range
Matches an element with a range when its value is in-range. A ‘input pseudo-class’.
:indeterminate
Matches UI elements whose value is in an indeterminate state, usually checkboxes. A ‘input pseudo-class’.
:invalid
Matches an element, such as an <input>, in an invalid state. A ‘input pseudo-class’.
:is
Matches any of the selectors in the selector list that is passed in. A ‘condition pseudo-class’.
L
:lang
Matches an element based on language, value of the HTML lang attribute. A ‘input pseudo-class’.
:last-child
Matches an element that is last among its siblings. A ‘three-structural pseudo-class’.
:last-of-type
Matches an element of a certain type that is last among its siblings. A ‘three-structural pseudo-class’.
:left
In Paged Media, matches left-hand pages. A ‘placement pseudo-class’.
:link
Matches unvisited links. A ‘location pseudo-class’.
:local-link
Matches links pointing to pages that are on the same site as the current document. A ‘location pseudo-class’.
M
::marker
Matches the marker box of a list item, which typically contains a bullet or number. A ‘pseudo-element’.
N
:not
Matches things not matched by selectors that are passed in as a value to this selector. A ‘condition pseudo-class’.
:nth-child
Matches elements from a list of siblings, the siblings are matched by a formula of the form an+b, such as 2n + 1 would match elements 1, 3, 5, 7, and so on. All the odd ones. A ‘three-structural pseudo-class’.
:nth-last-child
Matches elements from a list of siblings, counting backwards from the end. The siblings are matched by a formula of the form an+b, such as 2n + 1 would match the last element in the sequence, then two elements before that, then two elements before that, and so on. All the odd ones, counting from the end. A ‘three-structural pseudo-class’.
:nth-last-of-type
Matches elements from a list of siblings that are of a certain type, such as <p> elements, counting backwards from the end. The siblings are matched by a formula of the form an+b, such as 2n + 1 would match the last element of that type in the sequence, then two elements before that, then two elements before that, and so on. All the odd ones, counting from the end. A ‘three-structural pseudo-class’.
:nth-of-type
Matches elements from a list of siblings that are of a certain type, such as <p> elements, the siblings are matched by a formula of the form an+b, such as 2n + 1 would match that type of element, numbers 1, 3, 5, 7, and so on. All the odd ones. A ‘three-structural pseudo-class’.
O
:only-child
Matches an element that has no siblings. A ‘three-structural pseudo-class’.
:only-of-type
Matches an element that is the only one of its type among its siblings. A ‘three-structural pseudo-class’.
:optional
Matches form elements that are not required. A ‘input pseudo-class’.
:out-of-range
Matches an element with a range when its value is out of range. A ‘input pseudo-class’.
P
:past
Matches the elements before the current element. A ‘time-dimensional pseudo-class’.
:paused
Matches an element representing an audio, video, or similar resource that is capable of being ‘played’ or ‘paused’, when that element is ‘paused’. A ‘resource state pseudo-class’.
:placeholder-shown
Matches an input element that is showing placeholder text. A ‘input pseudo-class’.
:playing
Matches an element representing an audio, video, or similar resource that is capable of being ‘played’ or “paused”, when that element is ‘playing’. A ‘resource state pseudo-class’.
R
:read-only
Matches an element if it is not user-alterable. A ‘input pseudo-class’.
:read-write
Matches an element if it is user-alterable. A ‘input pseudo-class’.
:required
Matches form elements that are required. A ‘input pseudo-class’.
:right
In Paged Media, matches right-hand pages. A ‘placement pseudo-class’.
:root
Matches an element that is the root of the document. A ‘three-structural pseudo-class’.
S
:scope
Matches any element that is a scope element. A ‘location pseudo-class’.
::selection
Matches the portion of the document that has been selected. A ‘pseudo-element’.
::spelling-error
Matches a portion of the document containing a spelling error as flagged by the browser. A ‘pseudo-element’.
T
:target
Matches an element if it is the target of the current URL, such as if it has an ID matching the current URL fragment. A ‘location pseudo-class’.
:target-within
Matches elements that are the target of the document URL, but also elements that have a descendant which is the target of the document URL. A ‘location pseudo-class’.
:user-invalid
Represents an element with incorrect input, but only when the user has interacted with it. A ‘input pseudo-class’.
V
:valid
Matches an element such as an <input> element, in a valid state. A ‘input pseudo-class’.
:visited
Matches visited links. A ‘location pseudo-class’.
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