counter-increment

The counter-increment CSS property can be used to increase or decrease the value of the named CSS counters by the specified values, or to prevent all counters or an individual counter’s value from being changed.

If a named counter in the list of space-separated counters and values doesn’t exist, it will be created. If no value is provided for a counter in the list of counters, the counter will be increased by 1.

The counter’s value can be reset to any integer value with the counter-reset CSS property.

Values: This property is specified as a space-separated list of <custom-ident> values, each optionally followed by an <integer>, or the keyword none:

Syntax example: counter-increment: my-counter;