html 短蓝条 loading

<div class="bg-white rounded-md relative">
    <div class="absolute pin-x bg-loader-line w-full top-0"></div>
</div>

.bg-loader-line {
  -webkit-animation-duration: 2s;
  -webkit-animation-fill-mode: forwards;
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-name: loaderLineShimmer;
  -webkit-animation-timing-function: linear;
  background-image: linear-gradient(
    to right,
    rgba(0, 122, 255, 0) 0%,
    rgba(0, 122, 255, 0) 60%,
    rgba(0, 122, 255, 1) 80%,
    rgba(0, 122, 255, 0) 100%
  );
  background-repeat: repeat-y;
  background-size: 440px 3px;
  position: absolute;
  height: 3px;
  bottom: -2px;
}

@keyframes loaderLineShimmer {
  0% {
    background-position: -440px 0;
  }

  100% {
    background-position: 440px 0;
  }
}

.bg-loader-inactive {
  background-color: #525252;
}

.bg-loader-5s {
  -webkit-animation-duration: 7s;
  -webkit-animation-fill-mode: forwards;
  -webkit-animation-name: introButtonLoading;
  -webkit-animation-timing-function: linear;
  background-image: linear-gradient(
    to right,
    rgba(255, 255, 255, 1) 50%,
    rgba(255, 255, 255, 0) 50%
  );
  background-repeat: repeat-y;
  background-size: 60px 5px;
  position: relative;
}