counter-increment

The counter-increment CSS property increases or decreases the value of a CSS counter by a given amount. The counter's value can be reset to an arbitrary number using the counter-reset CSS property.

/* Increment "my-counter" by 1 */
counter-increment: my-counter;
/* Decrement "my-counter" by 1 */
counter-increment: my-counter -1;
/* Increment "counter1" by 1, and decrement "counter2" by 4 */
counter-increment: counter1 counter2 -4;
/* Do not increment/decrement anything: used to override less specific rules */
counter-increment: none;
/* Global values */
counter-increment: inherit;
counter-increment: initial;
counter-increment: unset;

Syntax

The counter-increment property is specified as either one of the following:

• A <custom-ident> naming the counter, followed optionally by an <integer>. You may specify as many counters to increment as you want, with each name or name-number pair separated by a space.
• The keyword value none.

Values

<custom-ident>

The name of the counter to increment.

<integer>

The value to add to the counter. Defaults to 1 if not specified.

none

No counter must be incremented. This is used as the default value, or to cancel an increment in more specific rules.

Formal syntax

[ <custom-ident> <integer>? ]+ | none

Examples

h1 {
  counter-increment: chapter section 2 page;
  /* Increases the value of the chapter and page counters by 1,
     and the section counter by 2 */
}

Specifications

Browser compatibility

[1] This feature is probably implemented since Safari 3.0.

See also

• Using CSS Counters
• counter-increment
• @counter-style