First look at such a piece of code:
@mixin theme($theme) {
.#{
$theme}-theme {
@content
}
}
In Sass, this @mixindirective is used to define a mixin, which is a reusable style block that can be included in multiple places in the style sheet. @contentThis directive is used to include the mixin's content when the mixin is included in your styles .
The example you provided defines a mixin themethat takes a parameter $theme.mixinthat generates a class whose name is based on the value of the $themein that class mixinand contains mixinthe content of the .
Here's an themeexample of how to use mixins:
@mixin theme($theme) {
.#{
$theme}-theme {
@content
}
}
@include theme(dark) {
background-color: black;
color: white;
}
@include theme(light) {
background-color: white;
color: black;
}
This will generate the following css:
.dark-theme {
background-color: black;
color: white;
}
.light-theme {
background-color: white;
color: black;
}
As you can see, themethe mixin generates a class whose name is based on $themethe value of the parameter, and wraps the mixin's content in that class. This is useful for creating themes or generating class names based on variables.