CSS - counter-set Property

The CSS counter-set property is used to change the value of a CSS counter to a specified number. It can change the value of existing counters and creates new counters only if there isn't already a counter with the same name.

Possible Values

  • <custom-ident> − The name of a counter. The name can be any string value.

  • integer − The default value to which the counter sets each time the element appears. This value can be zero, or even negative. If no integer is provided, the counter is reset to zero.

  • none − There will be no action taken to set the counter.

Syntax

counter-set: <counter name> <integer> ;

Applies to

All the HTML elements.

CSS counter-set - <custom-ident> Value

This program demonstrates the usage of the counter-set property. In this example, we set the counter-set property on the body element to head-counter 3, which sets the value of the head-counter counter to 3.

<html>
<head>
<style>
   body {
      counter-set: head-counter 3;
   }

   h1::before {
      counter-increment: head-counter;
      content: "Counter: " counter(head-counter) " - ";
   }

   h2::before {
      counter-increment: head-counter;
      content: "Sub-counter: " counter(head-counter)  " - ";
   }

   h3::before {
      counter-increment: head-counter;
      content: "Sub-sub-counter: " counter(head-counter)  " - ";
   }
</style>
</head>
<body>
<h1>Heading 1</h1>
<h2>Heading 2</h2>
<h3>Heading 3</h3>
<h2>Heading 2</h2>
<h3>Heading 3</h3>
<h3>Heading 3</h3>
</body>
</html>

CSS counter-set - <integer> Value

This program demonstrates the usage of the counter-set property with an integer value. This code will showcase the usage of the counter-set property with a value of -5. The counter-set property is applied to the body element, setting the value of the item-counter counter to -5.

<html>
<head>
<style>
   body {
      counter-reset: item-counter -5;
   }

   .counter-item::before {
      counter-increment: item-counter;
      content: counter(item-counter) " -";
   }
</style>
</head>
<body>
   <div class="counter-item">Item 1</div>
   <div class="counter-item">Item 2</div>
   <div class="counter-item">Item 3</div>
   <div class="counter-item">Item 4</div>
</body>
</html>
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