casefu-generator/lib/static/react/frontend/src/shared/form/Revalidating.css

CaseFu.com generator

.revalidating {
  animation: flasher 2s linear infinite;
}

@keyframes flasher {
  0% {
    opacity: 0.6;
  }
  50% {
    opacity: 0.3;
  }
  100% {
    opacity: 0.6;
  }
}