Bootstrap progress animating stripes for all HTML elements

bootstrap-progress-animation.scss

@-webkit-keyframes u-progress-stripes {
  from { background-position: 0 0 }
  to { background-position: 40px 0 }
}
@-moz-keyframes u-progress-stripes {
  from { background-position: 0 0 }
  to { background-position: 40px 0 }
}
@keyframes u-progress-stripes {
  from { background-position: 0 0 }
  to { background-position: 40px 0 }
}
.u-striped {
  background-image: -webkit-gradient(linear, 0 100%, 100% 0, color-stop(0.25, rgba(255, 255, 255, 0.15)), color-stop(0.25, transparent), color-stop(0.5, transparent), color-stop(0.5, rgba(255, 255, 255, 0.15)), color-stop(0.75, rgba(255, 255, 255, 0.15)), color-stop(0.75, transparent), to(transparent));
  background-image: -webkit-linear-gradient(-45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent);
  background-image: -moz-linear-gradient(-45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent);
  background-image: -ms-linear-gradient(-45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent);
  background-image: -o-linear-gradient(-45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent);
  background-image: linear-gradient(-45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent);
  -webkit-background-size: 40px 40px;
  -moz-background-size: 40px 40px;
  -o-background-size: 40px 40px;
  background-size: 40px 40px;
}
.u-striped.u-striped-animated {
  -webkit-animation: u-progress-stripes 1s linear infinite;
  -moz-animation: u-progress-stripes 1s linear infinite;
  animation: u-progress-stripes 1s linear infinite;
}