HTML | DOM Style counterIncrement Property

Last Updated : 08 Aug, 2022

The Style counterIncrement property in HTML DOM specifies how much the counter should be incremented on each occurrence of a selector. The Default value for an increment is 1.

Syntax:

Return the counterIncrement property:

object.style.counterIncrement

Set the counterIncrement property:

object.style.counterIncrement = "none|number|initial|inherit"

Property Values:

None: It is the default value. This value does not reset the counter.
Number: Sets an increment for the named counter each time the element appears. This increment can be zero, or even negative. The default value is 1 if not specified.
Initial: Sets the element to its initial position.
Inherit: The Element inherits its property from the parent element.

Example-1: Change counterIncrement Property.

html

<!DOCTYPE html> <html lang="en">  <head>     <title>         HTML | DOM Style counterIncrement Property     </title>     <style type="text/css">         body {             counter-reset: section;         }                  h1 {             color: green;         }                  h2 {             counter-increment: section;         }                  h2:before {             content: "Section "               counter(section) ". ";         }     </style> </head>  <body>     <h1>GeeksForGeeks</h1>     <h2>JavaScript</h2>     <h2 id="h">HTML</h2>     <h2>CSS </h2>     <button onclick="myFunction()">       Check   </button>        <script>         function myFunction() {             document.getElementById(               "h").style.counterIncrement =                "subsection";         }     </script> </body>  </html>

Output:
Before:

After:

Example- 2: counterIncrement Property.

html

<!DOCTYPE html> <html lang="en">  <head>     <title>         HTML | DOM Style counterIncrement Property     </title>     <style type="text/css">         body {             counter-reset: section;         }                  h1 {             color: green;         }                  h2 {             counter-increment: section;         }                  h2:before {             content:                "Section " counter(section) ". ";         }                  h3:before {             counter-increment: category;             content: counter(section) "." counter(category) " ";         }     </style> </head>  <body>     <h1>GeeksForGeeks</h1>     <h2>Javascript</h2>     <h2 id="h">HTML</h2>     <h2 id="H">CSS </h2>     <h2>References</h2>     <h3>HTML Tags</h3>     <h3>CSS Properties</h3>     <button onclick="myFunction()"             >Check 1   </button>        <button onclick="Function()">       Check 2   </button>        <script>         function myFunction() {             document.getElementById(               "h").style.counterIncrement =                "subsection";         }          function Function() {             document.getElementById(               "H").style.counterIncrement =                "subsection";         }     </script> </body>  </html>