name: "@function"
description: "The `@function` CSS at-rule defines a custom function that takes CSS values or custom properties as arguments, and returns a CSS value. It can be based on conditional logic such as by using the `@media` at-rule."
spec: https://drafts.csswg.org/css-mixins-1/#function-rule
group: css
compat_features:
  - api.CSSFunctionDeclarations
  - api.CSSFunctionDeclarations.style
  - api.CSSFunctionDescriptors
  - api.CSSFunctionDescriptors.result
  - api.CSSFunctionRule
  - api.CSSFunctionRule.getParameters
  - api.CSSFunctionRule.name
  - api.CSSFunctionRule.returnType
  - css.at-rules.function
  - css.at-rules.function.result
  - css.types.dashed-function
  - css.types.type