tailwind-debugger-utilities.css

.\? {
  position: relative;
}

.\?::before {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  border: 5px solid transparent;
  animation: blink 1000ms;
  animation-iteration-count: infinite;
}

@keyframes blink {
  50% {
    border-color: #ff0000;
  }
}