HTML tutorial
CSS3 tutorial
Bootstrap tutorial
JavaScript tutorial
JQuery tutorial
AngularJS tutorial
React tutorial
NodeJS tutorial
PHP tutorial
Python tutorial
Python3 tutorial
Django tutorial
Linux tutorial
Docker tutorial
Ruby tutorial
Java tutorial
C tutorial
C ++ tutorial
Perl tutorial
JSP tutorial
Lua tutorial
Scala tutorial
Go tutorial
ASP.NET tutorial
C # tutorial
The introspection functions are rarely used when building a stylesheet. However, they are valuable if something does not work properly - to figure out what's going on: like debugging functions
The introspection functions are rarely used when building a stylesheet. However, they are valuable if something does not work properly - to figure out what's going on: like debugging functions.
The following table lists all introspection functions in Sass:
Function | Description & Example |
---|---|
call(function, arguments...) | Calls a function with arguments, and returns the result. |
content-exists() | Checks whether the current mixin was passed a @content block. |
feature-exists(feature) | Checks whether feature is supported by the current Sass
implementation. Example: feature-exists("at-error"); Result: true |
function-exists(functionname) | Checks whether the specified function exists. Example: function-exists("nonsense") Result: false |
get-function(functionname, css: false) | Returns the specified function. If css is true, it returns a plain CSS function instead. |
global-variable-exists(variablename) | Checks whether the specified global variable exists. Example: variable-exists(a) Result: true |
inspect(value) | Returns a string representation of value. |
mixin-exists(mixinname) | Checks whether the specified mixin exists. Example: mixin-exists("important-text") Result: true |
type-of(value) | Returns the type of 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) | Returns the unit associated with a number. Example: unit(15px) Result: px |
unitless(number) | Checks whether the specified number has a unit associated with it. Example: unitless(15px) Result: false unitless(15) Result: true |
variable-exists(variablename) | Checks whether the specified variable exists in the current scope. Example: variable-exists(b) Result: true |