小编xin*_* Zì的帖子

What does % indicate in scss?

Use of % in context: (source: https://codepen.io/FWeinb/pen/GrpqB?editors=1100)

@import "compass/css3";

.box{
  margin: 5em auto;
  position: relative;
  width: 10em;
  height: 10em;
  line-height: 10em;
  overflow: hidden;
}

%box__dir{
  position: absolute;
  width: inherit;
  height: inherit;          
  text-align: center;
  line-height: inherit;
  transition:transform .4s ease;
}

What does the percentage sign before "box_dir" indicate?