css 边框流光效果

旋转流光

// html
<div class="demo">
  <div class="demo-content">
    旋转流光
  </div>
</div>
------------------------------------------------------
// 样式
body {
  background-color: black;
}

:root {
  --outer-radius: 0.5rem;
  --border-size: 5px;
}

@property --border-gradient-angle {
  syntax: "<angle>";
  inherits: true;
  initial-value: 0turn;
}

.demo {
  background-image: conic-gradient(from var(--border-gradient-angle) at 50% 50%, transparent, #70ffaf 14%, transparent 17%);
  border-radius: var(--outer-radius);
  background-size: contain;
  padding: var(--border-size);
  animation: buttonBorderSpin 9s linear infinite 0ms;
  width: 300px;
  height: 200px;
}

@keyframes buttonBorderSpin {
  0% {
    --border-gradient-angle: 0turn;
  }

  100% {
    --border-gradient-angle: 1turn;
  }
}

.demo-content {
  width: 100%;
  height: 100%;
  background-color: black;
}

平移流光

// html
<div class="demo2">
  <div class="demo2-content">
    平移流光
  </div>
</div>
----------------------------------------------------------------
// 样式
:root {
  --outer-radius: 0.5rem;
  --border-size: 5px;
}

@property --border-gradient-angle {
  syntax: "<angle>";
  inherits: true;
  initial-value: 0turn;
}
.demo {
  margin-top: 10px;
  height: 50px;
  width: 300px;
  background-image: conic-gradient(from var(--border-gradient-angle) at 30% -30%, transparent 25%, #70ffaf 75%, transparent);
  animation: badgeBorderSpin 10s linear infinite;
  border-radius: var(--outer-radius);
  padding: var(--border-size);
}

@keyframes badgeBorderSpin {
  0% {
    --border-gradient-angle: 0turn;
  }

  100% {
    --border-gradient-angle: -1turn;
  }
}

.demo-content {
  width: 100%;
  height: 100%;
  background-color: black;
}