Creates a new first-class function that can be invoked usingmeta.call().

Parameters

• signature:string

  The function signature, like you'd write for the@function rule.

• callback:((args:Value[]) =>Value)

  The callback that's invoked when this function is called,just like for aCustomFunction.

  • • (args:Value[]):Value

    • Parameters

      • args:Value[]

      ReturnsValue

This value as a list.

All SassScript values can be used as lists. Maps count as lists of pairs,and all other values count as single-value lists.

Whether this value as a list has brackets.

All SassScript values can be used as lists. Maps count as lists of pairs,and all other values count as single-value lists.

Whether the value counts astrue in an@if statement and other contexts.

Returns JavaScript'snull value if this issassNull, and returnsthis otherwise.

The separator for this value as a list.

All SassScript values can be used as lists. Maps count as lists of pairs,and all other values count as single-value lists.

Throws ifthis isn't aSassBoolean.

Parameters

• Optionalname:string

  The name of the function argumentthis came from (withoutthe$) if it came from an argument. Used for error reporting.

Throws ifthis isn't aSassCalculation.

Parameters

• Optionalname:string

  The name of the function argumentthis came from (withoutthe$) if it came from an argument. Used for error reporting.

Throws ifthis isn't aSassColor.

Parameters

• Optionalname:string

  The name of the function argumentthis came from (withoutthe$) if it came from an argument. Used for error reporting.

Throws ifthis isn't aSassFunction.

Parameters

• Optionalname:string

  The name of the function argumentthis came from (withoutthe$) if it came from an argument. Used for error reporting.

Throws ifthis isn't aSassMap.

Parameters

• Optionalname:string

  The name of the function argumentthis came from (withoutthe$) if it came from an argument. Used for error reporting.

Throws ifthis isn't aSassMixin.

Parameters

• Optionalname:string

  The name of the function argumentthis came from (withoutthe$) if it came from an argument. Used for error reporting.

Throws ifthis isn't aSassNumber.

Parameters

• Optionalname:string

  The name of the function argumentthis came from (withoutthe$) if it came from an argument. Used for error reporting.

Throws ifthis isn't aSassString.

Parameters

• Optionalname:string

  The name of the function argumentthis came from (withoutthe$) if it came from an argument. Used for error reporting.

Returns whetherthis represents the same value asother.

Parameters

• other:Value

Returns the value at indexindex in this value as a list, orundefinedifindex isn't valid for this list.

All SassScript values can be used as lists. Maps count as lists of pairs,and all other values count as single-value lists.

This is a shorthand forthis.asList.get(index), although it may be moreefficient in some cases.

Parameters

• index:number

Returns a hash code that can be used to storethis in a hash map.

ConvertssassIndex into a JavaScript-style index into the list returnedbyasList.

Sass indexes are one-based, while JavaScript indexes are zero-based. Sassindexes may also be negative in order to index from the end of the list.

Throws

Error IfsassIndex isn't a number, if that number isn't aninteger, or if that integer isn't a valid index forasList.

Parameters

• sassIndex:Value

  The Sass-style index into this as a list.

• Optionalname:string

  The name of the function argumentsassIndex came from(without the$) if it came from an argument. Used for error reporting.

Returnsthis as a map if it counts as one (empty lists count as emptymaps) ornull if it doesn't.