How to control Sass Variable with javascript

Question

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

Answer 1

I also needed this functionality, here's what worked for me:

With JS you can set a class to body, ex. .blue or .default Now create a set of rules to extend from, which you'd like to set:

.default .themeColor {
  color: 'red';
}
.blue .themeColor {
  color: 'blue';
}

Now instead of having color: $someColor in your scss file, use it like this:

.someClass {
   @extend .themeColor;
 }

Now, if your body will have the default class, the color inside someClass will be red, and if body will have the blue class the color will be blue.