SASS

Mixins

Building Off of Bootstrap

@mixin breakpoint($class) {
  @if $class == xs {
    @media (max-width: 767px) { @content; }
  }
 
  @else if $class == sm {
    @media (min-width: 768px) { @content; }
  }
 
  @else if $class == md {
    @media (min-width: 992px) { @content; }
  }
 
  @else if $class == lg {
    @media (min-width: 1200px) { @content; }
  }
  
  @else if $class == xl {
    @media (min-width: 1800px) { @content; }
  }

  @else {
    @warn "Breakpoint mixin supports: xs, sm, md, lg, xl";
  }
}

Using the Mixin Within Your Code

aside.primary {
  float: right;
  width: 350px;
  @include breakpoint(sm) {
    float: none;
    width: 100%;
  }
}

Resources

• Responsive Desing: Helpful SASS mixins
• Simple SASS mixins to handle responsive breakpoints

Sass

• SCSS Tutorial
• 7 Sass techniques to help you write better code
• Structuring your Sass Projects
• css-tricks: Sass Techniques from the Trenches