portal-FE-common/src/styles/bootstrap/mixins/_transition.scss

   1 @mixin transition($transition...) {
   2   @if $enable-transitions {
   3     @if length($transition) == 0 {
   4       transition: $transition-base;
   5     } @else {
   6       transition: $transition;
   7     }
   8   }
   9 }