心电图Loading，HTML/Vue代码在线实时编辑、预览

<div class="loading"> <svg width="64px" height="48px"> <polyline points="0.157 23.954, 14 23.954, 21.843 48, 43 0, 50 24, 64 24" id="back"></polyline> <polyline points="0.157 23.954, 14 23.954, 21.843 48, 43 0, 50 24, 64 24" id="front"></polyline> </svg> </div>

            
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            body {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #202020;
  box-sizing: border-box;
  padding: 15px;
}

.loading svg polyline {
  fill: none;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.loading svg polyline#back {
  fill: none;
  stroke: #ff4d5033;
}

.loading svg polyline#front {
  fill: none;
  stroke: #ff4d4f;
  stroke-dasharray: 48, 144;
  stroke-dashoffset: 192;
  animation: dash_682 1.4s linear infinite;
}

@keyframes dash_682 {
  72.5% {
    opacity: 0;
  }

  to {
    stroke-dashoffset: 0;
  }
}