SASS | String Operators

Sass supports some operators that can be used to generate strings.

• <expression> + <expression> returns a string that contains both expressions’ values. If the either value is a quoted string, the result will be quoted; otherwise, it will be unquoted.
• <expression> / <expression> returns an unquoted string that contains both expressions’ values, separated by /.
• <expression> - <expression> returns an unquoted string that contains both expressions’ values, separated by -. This is a legacy operator, and interpolation should generally be used instead.

Example:

@debug "Geeks" + "forGeeks" 

Output:

"GeeksforGeeks"

@debug Geeks + forGeeks

Output:

GeeksforGeeks

@debug #{20px + 10px} / 50px

Output:

30px/50px

@debug Geeks - for - Geeks

Output:

Geeks-for-Geeks

The above operators are not only used for strings but for any values that you can code in CSS. But, you must know about the following exceptions to this:

• Numbers can’t be used as the left-hand value of an equation, because they have their own operators.
• Colors can’t be used as the left-hand value in an equation, because they used to have their own operators.

@debug "Elapsed time: " + 40s

Output:

"Elapsed time: 40s"

@debug true + " is a boolean value"

Output:

"true is a boolean value"

Note: Always try to use interpolation to create strings as they are cleaner and clearer, rather than using the operators. Unary Operators For some historical reasons, Sass also supports / and - as unary operators that take only a single value:

• / <expression> returns an unquoted string starting with / and followed by the expression’s value.
• - <expression> returns an unquoted string starting with - and followed by the expression’s value.

@debug / geeks

Output:

/geeks

@debug - geeks

Output:

-geeks