webpack-bootstrap-ui-kit/src/scss/_animations.scss

// pulse

@keyframes pulse {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(0.8);
  }

  100% {
    transform: scale(1);
  }
}

@keyframes fade {
  0% {
    filter: grayscale(0);
    opacity: 1;
  }

  50% {
    filter: grayscale(1);
    opacity: 0.5;
  }

  100% {
    filter: grayscale(0);
    opacity: 1;
  }
}

@keyframes expand {
  from {
    max-height: 0;
    overflow: hidden;
  }

  to {
    max-height: 500rem;
    max-height: 200vh;
    overflow: visible;
  }
}