title: Bootstrap media queries mixins
body: <p>I recently taught myself how to use Bootstrap, and I am trying to use the responsive media queries that are available as Sass mixins (Note I have never used Sass before). I can't get the @include media-breakpoint queries to work. The screenshot below shows an example of how I have tried using it in Atom. It seems to me that Atom is not recognizing the syntax, even though the Bootstrap cdn is linked to my index file. What am I missing? Thanks.</p>
  
  <p><a href="https://i.stack.imgur.com/4qGXn.png" rel="nofollow noreferrer">example Bootstrap mixin</a></p>