JSFiddle - React, Tailwind, and code Playground

HTML

<blink>HAHAHAHA</blink>

CSS

blink {
  animation: blink 1000ms fast infinite;
}

@keyframes blink {
  0% {
    opacity: 1;
  }
  49% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
  99% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}