css-selector-parser / Exports / AstFormula
Pseudo-class formula value. a is multiplier of n and b us added on top. Formula: an + b.
For instance :nth-child(2n + 1) -> {type: 'AstPseudoClass'..., argument: {type: 'Formula', a: 2, b: 1}}.
Generated by ast.formula.
See
https://developer.mozilla.org/en-US/docs/Web/CSS/:nth-child#functional_notation
• a: number
Multiplier of n.
• b: number
Constant added to a*n.
• type: "Formula"