使用fontawsome图层的渐变内圆

Question

我正在尝试使用font-awsome layers和css来达到与下面的图片相同的效果。我可以实现除了梯度之外的所有东西。有没有可能不使用任何额外的图形？

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到目前为止我的代码如下：

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<script  src="https://use.fontawesome.com/releases/v5.8.1/js/all.js"></script>
<span class="fa-layers fa-fw fa-7x">
        <i class="far fa-circle progress-circle" ></i>
        <i class="far fa-circle progress-circle-small" data-fa-transform="shrink-8" style="color: white;"></i>
        <i class="fas fa-sync-alt progress-circle-small" data-fa-transform="shrink-12" style="color: white;"></i>
    </span>

​

Answer 1

您可以使用如下所示的伪元素添加它

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.custom {
  position: relative;
  z-index: 0;
}

.custom:before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width:1em;
  margin:auto;
  border-radius: 50%;
  background: linear-gradient(to right, blue, red);
  transform:scale(0.9);
}

<script data-search-pseudo-elements src="https://use.fontawesome.com/releases/v5.8.1/js/all.js"></script>
<span class="fa-layers fa-fw fa-7x custom">
    <i class="far fa-circle progress-circle" ></i>
    <i class="far fa-circle progress-circle-small" data-fa-transform="shrink-8" style="color: white;"></i>
    <i class="fas fa-sync-alt progress-circle-small" data-fa-transform="shrink-12" style="color: white;"></i>
</span>

<span class="fa-layers fa-fw fa-4x custom">
    <i class="far fa-circle progress-circle" ></i>
    <i class="far fa-circle progress-circle-small" data-fa-transform="shrink-8" style="color: white;"></i>
    <i class="fas fa-sync-alt progress-circle-small" data-fa-transform="shrink-12" style="color: white;"></i>
</span>

<span class="fa-layers fa-fw fa-2x custom">
    <i class="far fa-circle progress-circle" ></i>
    <i class="far fa-circle progress-circle-small" data-fa-transform="shrink-8" style="color: white;"></i>
    <i class="fas fa-sync-alt progress-circle-small" data-fa-transform="shrink-12" style="color: white;"></i>
</span>

​