counter-increment

Summary

The counter-increment CSS property is used to increase the value of CSS Counters by a given value. The counter's value can be reset using the counter-reset CSS property.

Syntax

/* Increment 'counter-name' by 1 */
counter-increment: counter-name;

/* Decrement 'counter-name' by 1 */
counter-increment: counter-name -1;

/* Increment 'counter1' by 1, and decrement 'counter2' by 4 */
counter-increment: counter1 counter2 -4;

/* Do not increment/decrement anything: used to hide less specific values */
counter-increment: none;

/* Global values */
counter-increment: inherit;
counter-increment: initial;
counter-increment: unset;

Values

<custom-ident>

The name of the counter to increment. This identifier is composed by a combination of case-insensitive letters a to z, numbers 0 to 9, underscores (_), and/or dashes (-). The first non-dash character must be a letter (that is, no number at the beginning of it, even if preceded by a dash.) Also, two dashes are forbidden at the beginning of the identifier. It can't be none, unset, initial, or inherit in any combination of cases.

<integer>

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

none

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

You may specify as many counters to increment as you want, each separated by a space.

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-reset