Sass - String Functions

If you've worked in strings in a programming language, you'll be quite comfortable with the Sass string functions, with one exception: Sass strings are NOT zero-based arrays. The first character in a Sass string is at index 1, not 0.

For example. the Sass function str-index($string, $substring) returns the position of the first occurrence of $substring in $string. The equivalent JavaScript function is the indexOf(<substring>) method. But given the same arguments, they don't return the same values:

            $str-index("hello","h"); //Sass returns 1

"hello".indexOf("h"); //JavaScript returns 0

The following table lists all string functions in Sass.

Function	Description	Examples
unquote($string)	Removes the quotes, if any, around a string	unquote("hello") Result: hello
quote($string)	Adds quotes to an unquoted string; returns a quoted string unmodified	quote(hello) Result: "hello"
quote($string)		quote("hello") Result: "hello"
str-length($string)	Returns the number of characters in a string	str-length("hello") Result: 5
str-insert($string, $insert, $index)	Inserts the string specified as $insert at the specified index position inside string	str-insert(" world", "hello", 0) Result: "hello world"
str-index($string, $substring)	Returns the index of the first occurrence of $substring inside $string, or null if the string is not found	str-index("Hello", "H") Result: 1
str-index($string, $substring)		str-index("hello", "H") Result: null
str-slice($string, $start-at, [$end-at])	Returns a substring beginning at position $start-at and optionally ending at position $end-at	str-slice("hello, world", 8) "world"
str-slice($string, $start-at, [$end-at])		str-slice("hello, world", 8, 9) Result: "wo"
to-upper-case($string)	Returns a string containing $string converted to upper case	to-upper-case("hello") Result:"HELLO"
to-lower-case($string)	Returns a string containing $string converted to lower case	to-lower-case("Hello") "hello"