---
id: 587d7dbe367417b2b2512bb8
title: Use @if and @else to Add Logic To Your Styles
challengeType: 0
---
## Description
The @if
directive in Sass is useful to test for a specific case - it works just like the if
statement in JavaScript.
@mixin make-bold($bool) {
@if $bool == true {
font-weight: bold;
}
}
And just like in JavaScript, @else if
and @else
test for more conditions:
@mixin text-effect($val) {
@if $val == danger {
color: red;
}
@else if $val == alert {
color: yellow;
}
@else if $val == success {
color: green;
}
@else {
color: black;
}
}
## Instructions
Create a mixin
called border-stroke
that takes a parameter $val
. The mixin
should check for the following conditions using @if
, @else if
, and @else
:
light - 1px solid black
medium - 3px solid black
heavy - 6px solid black
none - no border
## Tests
```yml
tests:
- text: Your code should declare a mixin
named border-stroke
which has a parameter named $val
.
testString: assert(code.match(/@mixin\s+?border-stroke\s*?\(\s*?\$val\s*?\)\s*?{/gi), 'Your code should declare a mixin
named border-stroke
which has a parameter named $val
.');
- text: Your mixin
should have an @if
statement to check if $val
is light, and to set the border
to 1px solid black.
testString: assert(code.match(/@if\s+?\$val\s*?===?\s*?light\s*?{\s*?border\s*?:\s*?1px\s+?solid\s+?black\s*?;\s*?}/gi), 'Your mixin
should have an @if
statement to check if $val
is light, and to set the border
to 1px solid black.');
- text: Your mixin
should have an @else if
statement to check if $val
is medium, and to set the border
to 3px solid black.
testString: assert(code.match(/@else\s+?if\s+?\$val\s*?===?\s*?medium\s*?{\s*?border\s*?:\s*?3px\s+?solid\s+?black\s*?;\s*?}/gi), 'Your mixin
should have an @else if
statement to check if $val
is medium, and to set the border
to 3px solid black.');
- text: Your mixin
should have an @else if
statement to check if $val
is heavy, and to set the border
to 6px solid black.
testString: assert(code.match(/@else\s+?if\s+?\$val\s*?===?\s*?heavy\s*?{\s*?border\s*?:\s*?6px\s+?solid\s+?black\s*?;\s*?}/gi), 'Your mixin
should have an @else if
statement to check if $val
is heavy, and to set the border
to 6px solid black.');
- text: Your mixin
should have an @else
statement to set the border
to none.
testString: assert(code.match(/@else\s*?{\s*?border\s*?:\s*?none\s*?;\s*?}/gi), 'Your mixin
should have an @else
statement to set the border
to none.');
```
## Challenge Seed
## Solution
```js
// solution required
```