mirror of
https://github.com/danog/sass-site.git
synced 2024-12-05 21:39:02 +01:00
78 lines
2.5 KiB
Plaintext
78 lines
2.5 KiB
Plaintext
---
|
|
title: String Operators
|
|
introduction: >
|
|
Sass supports a few operators that generate
|
|
[strings](/documentation/values/strings):
|
|
---
|
|
|
|
{% markdown %}
|
|
* `<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 `-`. This is a legacy operator, and
|
|
[interpolation][] should generally be used instead.
|
|
|
|
[quoted string]: /documentation/values/strings#quoted
|
|
[interpolation]: /documentation/interpolation
|
|
{% endmarkdown %}
|
|
|
|
{% codeExample 'string', false %}
|
|
@debug "Helvetica" + " Neue"; // "Helvetica Neue"
|
|
@debug sans- + serif; // sans-serif
|
|
@debug sans - serif; // sans-serif
|
|
===
|
|
@debug "Helvetica" + " Neue" // "Helvetica Neue"
|
|
@debug sans- + serif // sans-serif
|
|
@debug sans - serif // sans-serif
|
|
{% endcodeExample %}
|
|
|
|
{% markdown %}
|
|
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][numeric].
|
|
* Colors can't be used as the left-hand value, because they used to have
|
|
[their own operators][color].
|
|
|
|
[numeric]: /documentation/operators/numeric
|
|
[color]: /documentation/operators
|
|
{% endmarkdown %}
|
|
|
|
{% codeExample 'string-exceptions', false %}
|
|
@debug "Elapsed time: " + 10s; // "Elapsed time: 10s";
|
|
@debug true + " is a boolean value"; // "true is a boolean value";
|
|
===
|
|
@debug "Elapsed time: " + 10s // "Elapsed time: 10s";
|
|
@debug true + " is a boolean value" // "true is a boolean value";
|
|
{% endcodeExample %}
|
|
|
|
{% headsUp %}
|
|
It's often cleaner and clearer to use [interpolation][] to create strings,
|
|
rather than relying on these operators.
|
|
|
|
[interpolation]: /documentation/interpolation
|
|
{% endheadsUp %}
|
|
|
|
{% markdown %}
|
|
## 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.
|
|
{% endmarkdown %}
|
|
|
|
{% codeExample 'unary-operators', false %}
|
|
@debug / 15px; // /15px
|
|
@debug - moz; // -moz
|
|
===
|
|
@debug / 15px // /15px
|
|
@debug - moz // -moz
|
|
{% endcodeExample %}
|