Originally posted on my blog.
Let's say you allow 5 sizes of icons in your web application and they're in 6-pixel increments: 12, 18, 24, 30, and 36. Your Sass file might have something like the following to handle this:
.Icon {
&--size-12 {
width: 12px;
height: 12px;
font-size: 12px;
}
&--size-18 {
width: 18px;
height: 18px;
font-size: 18px;
}
&--size-24 {
width: 24px;
height: 24px;
font-size: 24px;
}
&--size-30 {
width: 30px;
height: 30px;
font-size: 30px;
}
&--size-36 {
width: 36px;
height: 36px;
font-size: 36px;
}
}
These all look really similar, right? The class names all have the same format, and each one sets a width
, height
, and font-size
to be the same thing. Would you believe me if I told you that it's possible to dynamically create blocks of CSS for class names in Sass?
Well, believe me! It's true!
Here's one way you can introduce a @for
to do this:
.Icon {
@for $i from 1 through 5 {
$base-size: 12;
$increment: 6;
$calculated-size: $base-size + ($i * $increment);
&--size-#{$calculated-size} {
width: #{$calculated-size}px;
height: #{$calculated-size}px;
font-size: #{$calculated-size}px;
}
}
}
What if you don't have even increments, though? You can also loop through an array of values like this:
$icon-sizes: 12, 16, 32, 48;
.Icon {
@each $size in $icon-sizes {
&--size-#{$size} {
width: #{size}px;
height: #{size}px;
font-size: #{size}px;
}
}
}
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Top comments (7)
love this trick!
maps combined with
@each
loops can also DRY up your code:I haven't used SASS in a long time but it has for loops now?! damn
Wow, that was helpful 🙏
wow we can simplify css so much!!
SCSS is really a bag of tricks I need to learn more about
Same!! 😄