counter-increment - CSS: Cascading Style Sheets 编辑

The counter-increment CSS property increases or decreases the value of a CSS counter by a given value.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

Note: The counter's value can be reset to an arbitrary number using the counter-reset CSS property.

Syntax

/* 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;

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 definition

Formal syntax

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

Examples

Incrementing named counters

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

BCD tables only load in the browser

See also

• Using CSS Counters
• counter-reset
• counter-set
• @counter-style
• The counter() and counters() functions