css - 特定路径未按预期使用 Dashoffset 进行动画处理

Question

我有一个 SVG 路径，我正在尝试使用 stroke-dasharray/stroke-dashoffset 组合技巧对其进行动画处理以“绘制”自身(参见 this article更多信息)。但是，尽管(据我所知)一切都已正确实现，但该技巧在这条道路上不起作用。所以，我的问题是，我在这里做错了什么？

这是有问题的路径:

<path class="cls-1" d="M13.36,28.18c-8.06,5.19-9.74,17-4,24.91a31.38,31.38,0,0,0,3.19-4.71L34.92,9.74C38.67,3.19,44.1,0,48.65,0,65.17,0,63.9,21,47.13,26.66c16,10.62,4.47,40.4-20.36,40.4C-2.29,67.06-7.39,35.05,10,24ZM35,27.94l-2.24-.24-14,24.19a42.77,42.77,0,0,1-4.15,5.91,23.84,23.84,0,0,0,12,2.87C46.73,60.67,54.48,32,35,27.94Zm.56-5.11c8.46-.16,13.17-2,16.36-8,4.15-7.82-3.59-14-9.66-3.51Z"></path>

以及我正在使用的 CSS(例如经过简化的):

path {
  stroke-dasharray: 415.9850769042969;
  stroke-dashoffset: 415.9850769042969;
  animation: letterB 5s linear infinite;
}

@keyframes letterB {
    to {
        stroke-dashoffset: 0;
    }
}

我试过:

• 调整dashoffset/dasharray
的长度
• 在其他浏览器中测试(Safari 11.0.3、Firefox 57.0.4)

不太确定该做什么或发生了什么，因此非常感谢任何有关此动画为何不起作用的指导。

另外，我创建了一个简化的大小写 on JSFiddle 。

---

主要环境: Chrome v64.0.3282.140

Answer 1

您需要将 fill:none 设置为 svg 才能发生动画...还有 stroke 和 笔划宽度...

...实际上，这里的想法是为您的中风

设置动画

堆栈片段

svg {
  padding: 20px;
}

path {
  stroke-dasharray: 415.9850769042969;
  stroke-dashoffset: 415.9850769042969;
  animation: letterB 5s linear forwards infinite;
  -webkit-animation: letterB 5s linear forwards infinite;
}

@keyframes letterB {
  0% {
    stroke-dashoffset: 415.9850769042969;
  }
  100% {
    stroke-dashoffset: 0;
  }
}

@-webkit-keyframes letterB {
  0% {
    stroke-dashoffset: 415.9850769042969;
  }
  100% {
    stroke-dashoffset: 0;
  }
}

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 302.67 67.06">
  <path class="cls-1" d="M13.36,28.18c-8.06,5.19-9.74,17-4,24.91a31.38,31.38,0,0,0,3.19-4.71L34.92,9.74C38.67,3.19,44.1,0,48.65,0,65.17,0,63.9,21,47.13,26.66c16,10.62,4.47,40.4-20.36,40.4C-2.29,67.06-7.39,35.05,10,24ZM35,27.94l-2.24-.24-14,24.19a42.77,42.77,0,0,1-4.15,5.91,23.84,23.84,0,0,0,12,2.87C46.73,60.67,54.48,32,35,27.94Zm.56-5.11c8.46-.16,13.17-2,16.36-8,4.15-7.82-3.59-14-9.66-3.51Z"
  fill="none" stroke-width="2" stroke="#000000"></path>
</svg>