Sass: String Operators
-
<expression> + <expression>
returns a string that contains both expressions' values. If the other 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-
. This is a legacy operator, and interpolation should generally be used instead.
@debug "Helvetica" + " Neue"; // "Helvetica Neue"
@debug sans- + serif; // sans-serif
@debug sans - serif; // sans-serif
These operators don’t just work for strings! They can be used with any values that can be written to CSS, with a few exceptions:
- Numbers can’t be used as the left-hand value, because they have their own operators.
- Colors can’t be used as the left-hand value, because they used to have their own operators.
@debug "Elapsed time: " + 10s; // "Elapsed time: 10s";
@debug true + " is a boolean value"; // "true is a boolean value";
note
It’s often cleaner and clearer to use interpolation to create strings, rather than relying on these operators.
Unary Operators
For historical reasons, Sass also supports /
and -
as a unary operators which take only one 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.
Example:
@debug / 15px; // /15px
@debug - moz; // -moz