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Conditional comments in HTML

In this article, we will discuss conditional comments in HTML.

Purpose of conditional comments

Conditional comments check whether HTML code block is parsed by a web browser or not based on the condition.

Syntax

<!--[if (expression)]>HTML<![endif]-->

Predefined strings

There are some predefined strings that could be used in the expression

1. IE – Check whether the browser is internet explorer or not.

2. WindowsEdition - Check the operating system installed on client’s machine.

Example

Consider the following example

<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
   <head>
      <meta charset="utf-8" />
      <title></title>
   </head>
   <body>
      <!--[if (IE)]>       Internet Explorer <![endif]-->
      <!--[if !(IE)]><!--> Other than IE<!--<![endif]-->
   </body>
</html>

Output

To check the output, open the HTML page in IE (version 9 or below) and chrome. You will get the following output

Click to Enlarge

Posted By -	Karan Gupta

Posted On -	Sunday, January 15, 2017

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