What is Pseudo-element in CSS

CSSWeb DevelopmentFront End Technology

A CSS Pseudo-element is basically a selector for specific parts of an element such as first-letter, first-line, etc. :after and :before pseudo elements can be used to insert after and before an element respectively.

Syntax

Following is the syntax for using CSS Pseudo elements on an element −

Selector::pseudo-element {
   css-property: /*value*/;
}

Example

Let’s see an example of CSS Pseudo Elements −

 Live Demo

<!DOCTYPE html>
<html>
<head>
<style>
ol, ul {
   list-style: none;
   counter-reset: demo_var2;
}
ul {
   counter-reset: demo_var1;
}
ol > li::before {
   counter-increment: demo_var2;
   content: counter(demo_var2, lower-roman) ") ";
}
li::after {
   counter-increment: demo_var1;
   content: " " counter(demo_var1) ". ";
}
</style>
</head>
<body>
<ul>
<li>Demo Line</li>
<ol>
<li>demo line</li>
<li>demo line</li>
</ol>
<li>Demo Line</li>
<ol>
<li>demo line</li>
<li>demo line</li>
</ol>
<li>Demo Line</li>
</ul>
</body>
</html>

Output

This will produce the following output −

Example

Let’s see another example of CSS Pseudo Elements −

 Live Demo

<!DOCTYPE html>
<html>
<head>
<style>
   ::-webkit-input-placeholder { /*Support for Edge */
   color: blue;
   font-style: italic;
}
:-ms-input-placeholder { /*Support for Internet Explorer */
   color: blue;
   font-style: italic;
}
::placeholder {
   color: blue;
   font-style: italic;
}
</style>
</head>
<body>
<h2> Sample Form </h2>
<textarea id="desc" name="desc" rows="5" cols="33" placeholder="Type here"></textarea>
<br />
<input type="text" name="author" placeholder="author name">
</body>
</html>

Output

This will produce the following output −

raja
Published on 08-Jan-2020 11:44:06
Advertisements