Sass Introspection Functions

Sass Functions

Sass Introspection functions are rarely used for building stylesheets; they are generally used for debugging code.

The following table lists Sass's Introspection functions:

Function	Description & Example
call(function, arguments...)	Dynamic call of a function, i.e., calling the function with arguments as parameters and returning the result.
content-exists()	Check whether the current mixin is passed a @content block.
feature-exists(feature)	Check whether the current Sass implementation supports the feature. Example: feature-exists("at-error"); Result: true
function-exists(functionname)	Detect whether the specified function exists Example: function-exists("nonsense") Result: false
get-function(functionname, css: false)	Return the specified function. If css is true, return the pure CSS function.
global-variable-exists(variablename)	Detect whether a global variable is defined. Example: variable-exists(a) Result: true
inspect(value)	Return a string representation; value is a Sass expression.
mixin-exists(mixinname)	Detect whether the specified mixin (mixinname) exists. Example: mixin-exists("important-text") Result: true
type-of(value)	Return the value type. The return value can be number, string, color, list, map, bool, null, function, arglist. Example: type-of(15px) Result: number type-of(#ff0000) Result: color
unit(number)	Return the unit (or compound unit) of the passed number. Example: unit(15px) Result: px
unitless(number)	Return a boolean value indicating whether the passed number has a unit. Example: unitless(15px) Result: false unitless(15) Result: true
variable-exists(variablename)	Determine whether a variable is in the current scope. Example: variable-exists(b) Result: true

---

Sass Functions

Other Extensions