Web Designing Theory: What is CSS Pseudo-Class Selector Explained with Examples

This Blog You Will Learn

ஃ What is CSS Pseudo-Class Selector Explain

ஃ Syntax

ஃ Why Pseudo-Class Selectors

ஃ Key Characteristics of Pseudo-Class Selectors

ஃ Common CSS Pseudo-Class Selectors with Examples

ஃ Structural Pseudo-Classes

What is CSS Pseudo-Class Selector Explain

CSS Pseudo-class selector is special keyword added to css selector that allows developers to apply styles to HTML element based on state behavior ,position or use interaction static structure

Syntax:

  
  selector:pseudo-class {
     property: value;
   }

Why Pseudo-Class Selectors

✅Browser history

✅Keyboard interaction

✅Mouse movement

✅Form validation states

✅Element order

Key Characteristics of Pseudo-Class Selectors

✔ Use a Single colon (:)

✔ Represent temporary or logical states

✔ React to user behavior

✔ Improve UX/UI without JavaScript

✔ Do not modify HTML content.

Common CSS Pseudo-Class Selectors with Examples

1) :hover

Applies style when user places the mouse over element

 
button:hover {
  background-color: pink;
  color: red;
}

2) :active

Applies styles when element is being clicked

 a:active {
  color: purple;
}

3) :visited

Styles links that have already been visited

a:visited {
 color: orange;

4) :focus

Used when an input field gets focus.

input:focus {
  border: 2px solid blue;
}

5) :link

Select links that have not been visited by the user yet

a:link{
  color:yellow
}

6) :checked

Applies to checked checkbox or radio button

input:checked {
  outline:2px solid red;
}

7) :disabled

styles disabled form elements

input:disabled{
  background-color:lightpink
}

8) :enabled

Styles enabled form elements

input:enabled {
 background-color:white;
}

Structural Pseudo-Classes

1) :first-child

Selects the first child of a parent element

 p:first-child {
  color: blue
}

2) :last-child

Selects the last child element

  p:last-child {
 color :green;
}

3) :nth-child()

Selects elements based on their position

 li:nth-child(1){
  color:red;
}

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Friday, January 23, 2026

What is CSS Pseudo-Class Selector Explained with Examples

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