ie_hex_str($color) Converts a color into the format understood by IE filters.

@media @media directives in Sass behave just like they do in plain CSS, with one extra capability: they can be nested

function_exists($name) Check whether a function with the given name exists.

selector_replace($selector, $original, $replacement) Replaces all instances of $original with $replacement

to_lower_case($string) Convert a string to lower case,

Function Directives It is possible to define your own functions in sass and use them in any value or script context. For example:

opacify($color, $amount) Also known as: fade_in Makes

simple_selectors($selector) Returns the simple

Nested Rules Sass allows CSS rules to be nested within one another. The inner rule then only applies within the outer rule’s selector. For example:

selector_unify($selector1, $selector2) Unifies two selectors into a single selector that matches only elements matched by