Use @if and @else to Add Logic To Your Styles not working

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Your code so far


<style type='text/sass'>
 @mixin border-stroke($val) {
 @if val == light {
   border:1px solid black;
   }
 @else if val == medium {
   border:3px solid black;
   }
 @else if val == heavy {
   border:6px solid black;
   }
 else {
    border:no-border;
  }
}
  
  
  #box {
    width: 150px;
    height: 150px;
    background-color: red;
    @include border-stroke(medium);
  }  
</style>

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

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User Agent is: Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0.

Link to the challenge:
https://learn.freecodecamp.org/front-end-libraries/sass/use-if-and-else-to-add-logic-to-your-styles

You need to tell us what’s happening.

U miss $ before val,that should be $val .And this is my solution:

@mixin border-stroke($val){
@if $val == light{
border:1px solid black;
}
@else if $val == medium {
border:3px solid black;
}
@else if $val == heavy{
border:6px solid black;
}
@else {
border:none;
}
}