[Home](./index.md) > [@jsamr/counter-style](./counter-style.md) > [CounterStyleStatic](./counter-style.counterstylestatic.md) > [additive](./counter-style.counterstylestatic.additive.md) ## CounterStyleStatic.additive property Create an additive system renderer. See [CSS Counter Styles Level 3, Accumulating Numerals: the additive system](https://www.w3.org/TR/css-counter-styles-3/#additive-system). Signature: ```typescript additive: (symbols: Record) => CounterStyleRenderer; ``` ## Remarks Additive systems might have "holes" in their range coverage. For example, an additive system which has no representation for "1" will not translate odd indexes. \*\*The behavior of this renderer for incomplete additive systems is unspecified.\*\*