---
id: 587d7dbe367417b2b2512bb8
title: Use @if and @else to Add Logic To Your Styles
challengeType: 0
videoUrl: ''
localeTitle: ''
---

## Description
undefined

## Instructions
undefined

## Tests
<section id='tests'>

```yml
tests:
  - text: يجب أن تقوم <code>mixin</code> بتعريف <code>mixin</code> مسمى <code>border-stroke</code> <code>mixin</code> ذات <code>mixin</code> يسمى <code>$val</code> .
    testString: 'assert(code.match(/@mixin\s+?border-stroke\s*?\(\s*?\$val\s*?\)\s*?{/gi), "Your code should declare a <code>mixin</code> named <code>border-stroke</code> which has a parameter named <code>$val</code>.");'
  - text: يجب أن يكون لديك <code>mixin</code> عبارة <code>@if</code> if للتحقق من أن <code>$val</code> خفيف ، وتعيين <code>border</code> إلى 1px أسود خالص.
    testString: 'assert(code.match(/@if\s+?\$val\s*?===?\s*?light\s*?{\s*?border\s*?:\s*?1px\s+?solid\s+?black\s*?;\s*?}/gi), "Your <code>mixin</code> should have an <code>@if</code> statement to check if <code>$val</code> is light, and to set the <code>border</code> to 1px solid black.");'
  - text: ''
    testString: 'assert(code.match(/@else\s+?if\s+?\$val\s*?===?\s*?medium\s*?{\s*?border\s*?:\s*?3px\s+?solid\s+?black\s*?;\s*?}/gi), "Your <code>mixin</code> should have an <code>@else if</code> statement to check if <code>$val</code> is medium, and to set the <code>border</code> to 3px solid black.");'
  - text: بك <code>mixin</code> ينبغي أن يكون <code>@else if</code> تصريح لمعرفة ما اذا كان <code>$val</code> ثقيلة، وضبط <code>border</code> ل6px أسود خالص.
    testString: 'assert(code.match(/@else\s+?if\s+?\$val\s*?===?\s*?heavy\s*?{\s*?border\s*?:\s*?6px\s+?solid\s+?black\s*?;\s*?}/gi), "Your <code>mixin</code> should have an <code>@else if</code> statement to check if <code>$val</code> is heavy, and to set the <code>border</code> to 6px solid black.");'
  - text: يجب أن يكون لديك <code>mixin</code> عبارة عن <code>@else</code> لتعيين <code>border</code> إلى بلا.
    testString: 'assert(code.match(/@else\s*?{\s*?border\s*?:\s*?none\s*?;\s*?}/gi), "Your <code>mixin</code> should have an <code>@else</code> statement to set the <code>border</code> to none.");'

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='html-seed'>

```html
<style type='text/sass'>



  #box {
    width: 150px;
    height: 150px;
    background-color: red;
    @include border-stroke(medium);
  }
</style>

<div id="box"></div>

```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```
</section>