SVG donut 切片在悬停时改变颜色

Question

我有一个简单的 SVG donut ，其中有 5 个相等的切片，使用 stroke-dashoffset="xx"放置。 donut 本身看起来不错，但是当我尝试向每个切片添加一些悬停更改时，例如，简单更改描边颜色:

donut-piece:hover {
  stroke: #fc7822;
}

它的效果不太好，因为所有圆圈基本上都在彼此之上。有没有办法让它按预期工作？

这是 donut 代码:

.donut-piece:hover {
  stroke: #fc7822;
}

<svg width="700" viewBox="0 0 42 42" class="donut">
   <circle class="donut-hole" cx="21" cy="21" r="15.91549430918954" fill="transparent"></circle>
   <circle class="donut-ring" cx="21" cy="21" r="15.91549430918954" fill="transparent" stroke="transparent" stroke-width="10"></circle>

   <circle class="donut-data donut-piece" cx="21" cy="21" r="15.91549430918954" fill="transparent" stroke="#535f7f" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="3"></circle>
   <circle class="donut-device donut-piece" cx="21" cy="21" r="15.91549430918954" fill="transparent" stroke="#556180" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="18"></circle>
   <circle class="donut-physical donut-piece" cx="21" cy="21" r="15.91549430918954" fill="transparent" stroke="#51628f" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="33"></circle>
   <circle class="donut-network donut-piece" cx="21" cy="21" r="15.91549430918954" fill="transparent" stroke="#556180" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="48"></circle>
   <circle class="donut-iot donut-piece" cx="21" cy="21" r="15.91549430918954" fill="transparent" stroke="#535f7f" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="63"></circle>

</svg>

Answer 1

当您位于圆的半径之外时，浏览器会突出显示正确的线段。然而，当指针位于圆半径内时，浏览器认为您是 将鼠标悬停在左下部分。这对应于 SVG 文件中的最后一个圆圈。

您之所以获得此效果，是因为您已将圆圈的填充设置为透明。当设置为 none 时，SVG 的悬停测试只会忽略 fill 或 lines。它们不被视为等同。

有两种方法可以解决您的问题:

<强>1。将圆圈的填充颜色更改为“无”

.donut-piece:hover {
  stroke: #fc7822;
}

<svg width="700" viewBox="0 0 42 42" class="donut">
   <circle class="donut-hole" cx="21" cy="21" r="15.91549430918954" fill="transparent"></circle>
   <circle class="donut-ring" cx="21" cy="21" r="15.91549430918954" fill="transparent" stroke="transparent" stroke-width="10"></circle>

   <circle class="donut-data donut-piece" cx="21" cy="21" r="15.91549430918954" fill="none" stroke="#535f7f" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="3"></circle>
   <circle class="donut-device donut-piece" cx="21" cy="21" r="15.91549430918954" fill="none" stroke="#556180" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="18"></circle>
   <circle class="donut-physical donut-piece" cx="21" cy="21" r="15.91549430918954" fill="none" stroke="#51628f" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="33"></circle>
   <circle class="donut-network donut-piece" cx="21" cy="21" r="15.91549430918954" fill="none" stroke="#556180" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="48"></circle>
   <circle class="donut-iot donut-piece" cx="21" cy="21" r="15.91549430918954" fill="none" stroke="#535f7f" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="63"></circle>

</svg>

<强>2。告诉浏览器忽略鼠标事件的填充

您可以通过设置pointer-events:visibleStroke;来做到这一点。 pointer-events 的默认值为 visiblePainted，它会测试填充和描边。

You can read more about pointer-events here .

.donut-piece {
  pointer-events: visibleStroke;
}

.donut-piece:hover {
  stroke: #fc7822;
}

<svg width="700" viewBox="0 0 42 42" class="donut">
   <circle class="donut-hole" cx="21" cy="21" r="15.91549430918954" fill="transparent"></circle>
   <circle class="donut-ring" cx="21" cy="21" r="15.91549430918954" fill="transparent" stroke="transparent" stroke-width="10"></circle>

   <circle class="donut-data donut-piece" cx="21" cy="21" r="15.91549430918954" fill="transparent" stroke="#535f7f" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="3"></circle>
   <circle class="donut-device donut-piece" cx="21" cy="21" r="15.91549430918954" fill="transparent" stroke="#556180" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="18"></circle>
   <circle class="donut-physical donut-piece" cx="21" cy="21" r="15.91549430918954" fill="transparent" stroke="#51628f" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="33"></circle>
   <circle class="donut-network donut-piece" cx="21" cy="21" r="15.91549430918954" fill="transparent" stroke="#556180" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="48"></circle>
   <circle class="donut-iot donut-piece" cx="21" cy="21" r="15.91549430918954" fill="transparent" stroke="#535f7f" stroke-width="10" stroke-dasharray="15 85" stroke-dashoffset="63"></circle>

</svg>