title: How to control Sass Variable with javascript
body: <p>I have a Sass file which is generating a CSS file. I have used many variables in my sass file for background color, font-size, now I want to control my all variables through JavaScript.</p>
  
  <p>For example, in style.sass we have</p>
  
  <pre><code>$bg : #000;
  $font-size: 12px;
  </code></pre>
  
  <p>How can I change these values from JavaScript?</p>