Click here to navigate the course.

Drag the edges to resize the window.

In Projects, you can keep track of your progress as you go throught the tasks. Check each item as you complete it!

Code Editor

main.css

Web Browser

Learn

Mixins and the & Selector

What is a Mixin?

In addition to variables and nesting, Sass has multiple constructs that reduce repetition.

In Sass, a mixin lets you make groups of CSS declarations that you want to reuse throughout your site.

The notation for creating a mixin is as follows:

@mixin backface-visibility {
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  -moz-backface-visibility: hidden;
  -ms-backface-visibility: hidden;
  -o-backface-visibility: hidden;
}

Note: Mixin names and all other Sass identifiers use hyphens and underscores interchangeably. The following code:

.notecard {
.front, .back {
    width: 100%;
    height: 100%;
    position: absolute;

    @include backface_visibility;
  }
}

is equivalent to the following CSS:

.notecard .front, .notecard .back {
  width: 100%;
  height: 100%;
  position: absolute;

   backface-visibility: hidden;
  -webkit-backface-visibility: hidden; 
  -moz-backface-visibility: hidden;
  -ms-backface-visibility: hidden;
  -o-backface-visibility: hidden;
}