Bootstrap 图标褪色

Question

我想知道当我将鼠标悬停在 bootstrap 图标上时如何显示它的填充版本。

我有这个代码：

<svg
  width="80px"
  height="80px"
  viewBox="0 0 16 16"
  class="bi bi-cloud-plus"
  fill="#5cb85c"
  xmlns="http://www.w3.org/2000/svg"
>
  <path
    fill-rule="evenodd"
    d="M4.406 3.342A5.53 5.53 0 0 1 8 2c2.69 0 4.923 2 5.166 4.579C14.758 6.804 16 8.137 16 9.773 16 11.569 14.502 13 12.687 13H3.781C1.708 13 0 11.366 0 9.318c0-1.763 1.266-3.223 2.942-3.593.143-.863.698-1.723 1.464-2.383zm.653.757c-.757.653-1.153 1.44-1.153 2.056v.448l-.445.049C2.064 6.805 1 7.952 1 9.318 1 10.785 2.23 12 3.781 12h8.906C13.98 12 15 10.988 15 9.773c0-1.216-1.02-2.228-2.313-2.228h-.5v-.5C12.188 4.825 10.328 3 8 3a4.53 4.53 0 0 0-2.941 1.1z"
  />
  <path
    fill-rule="evenodd"
    d="M8 5.5a.5.5 0 0 1 .5.5v1.5H10a.5.5 0 0 1 0 1H8.5V10a.5.5 0 0 1-1 0V8.5H6a.5.5 0 0 1 0-1h1.5V6a.5.5 0 0 1 .5-.5z"
  />
</svg>

（云加图标）我想知道如何将它合并到填充的伙伴（云加填充图标）。怎么样？

Answer 1

您可以使用 mouseenter 和 mouseleave 事件，并根据鼠标悬停与否更改图标的 innerHTML。

 
document.getElementById('cloud-plus').addEventListener('mouseenter', function() {
  this.innerHTML = `<path fill-rule="evenodd" d="M8 2a5.53 5.53 0 0 0-3.594 1.342c-.766.66-1.321 1.52-1.464 2.383C1.266 6.095 0 7.555 0 9.318 0 11.366 1.708 13 3.781 13h8.906C14.502 13 16 11.57 16 9.773c0-1.636-1.242-2.969-2.834-3.194C12.923 3.999 10.69 2 8 2zm.5 4a.5.5 0 0 0-1 0v1.5H6a.5.5 0 0 0 0 1h1.5V10a.5.5 0 0 0 1 0V8.5H10a.5.5 0 0 0 0-1H8.5V6z"/>`
})

document.getElementById('cloud-plus').addEventListener('mouseleave', function() {
  this.innerHTML = `<path fill-rule="evenodd" d="M4.406 3.342A5.53 5.53 0 0 1 8 2c2.69 0 4.923 2 5.166 4.579C14.758 6.804 16 8.137 16 9.773 16 11.569 14.502 13 12.687 13H3.781C1.708 13 0 11.366 0 9.318c0-1.763 1.266-3.223 2.942-3.593.143-.863.698-1.723 1.464-2.383zm.653.757c-.757.653-1.153 1.44-1.153 2.056v.448l-.445.049C2.064 6.805 1 7.952 1 9.318 1 10.785 2.23 12 3.781 12h8.906C13.98 12 15 10.988 15 9.773c0-1.216-1.02-2.228-2.313-2.228h-.5v-.5C12.188 4.825 10.328 3 8 3a4.53 4.53 0 0 0-2.941 1.1z" />
  <path fill-rule="evenodd" d="M8 5.5a.5.5 0 0 1 .5.5v1.5H10a.5.5 0 0 1 0 1H8.5V10a.5.5 0 0 1-1 0V8.5H6a.5.5 0 0 1 0-1h1.5V6a.5.5 0 0 1 .5-.5z" />`
})

<svg id="cloud-plus" width="80px" height="80px" viewBox="0 0 16 16" class="bi bi-cloud-plus" fill="#5cb85c" xmlns="http://www.w3.org/2000/svg"> // I added id of "cloud-plus" to element
  <path fill-rule="evenodd" d="M4.406 3.342A5.53 5.53 0 0 1 8 2c2.69 0 4.923 2 5.166 4.579C14.758 6.804 16 8.137 16 9.773 16 11.569 14.502 13 12.687 13H3.781C1.708 13 0 11.366 0 9.318c0-1.763 1.266-3.223 2.942-3.593.143-.863.698-1.723 1.464-2.383zm.653.757c-.757.653-1.153 1.44-1.153 2.056v.448l-.445.049C2.064 6.805 1 7.952 1 9.318 1 10.785 2.23 12 3.781 12h8.906C13.98 12 15 10.988 15 9.773c0-1.216-1.02-2.228-2.313-2.228h-.5v-.5C12.188 4.825 10.328 3 8 3a4.53 4.53 0 0 0-2.941 1.1z" />
  <path fill-rule="evenodd" d="M8 5.5a.5.5 0 0 1 .5.5v1.5H10a.5.5 0 0 1 0 1H8.5V10a.5.5 0 0 1-1 0V8.5H6a.5.5 0 0 1 0-1h1.5V6a.5.5 0 0 1 .5-.5z" />
</svg>

Answer 2

通常，完成此操作的方法是：

在您的标记中包含这两个元素（在本例中，包括填充版本和 non-filled 版本），具有共同的 parent.
隐藏填充版本CSS
在 parent 的 :hover 上，交换 CSS 以隐藏 non-filled 版本并显示填充版本。

见下文：

.icon-wrapper .bi-cloud-plus-fill {
  display: none;
}

.icon-wrapper:hover .bi-cloud-plus-fill {
  display: inline;
}

.icon-wrapper:hover .bi-cloud-plus {
  display: none;
}

<div class="icon-wrapper">
  <svg width="1em" height="1em" viewBox="0 0 16 16" class="bi bi-cloud-plus" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
  <path fill-rule="evenodd" d="M4.406 3.342A5.53 5.53 0 0 1 8 2c2.69 0 4.923 2 5.166 4.579C14.758 6.804 16 8.137 16 9.773 16 11.569 14.502 13 12.687 13H3.781C1.708 13 0 11.366 0 9.318c0-1.763 1.266-3.223 2.942-3.593.143-.863.698-1.723 1.464-2.383zm.653.757c-.757.653-1.153 1.44-1.153 2.056v.448l-.445.049C2.064 6.805 1 7.952 1 9.318 1 10.785 2.23 12 3.781 12h8.906C13.98 12 15 10.988 15 9.773c0-1.216-1.02-2.228-2.313-2.228h-.5v-.5C12.188 4.825 10.328 3 8 3a4.53 4.53 0 0 0-2.941 1.1z"/>
    <path fill-rule="evenodd" d="M8 5.5a.5.5 0 0 1 .5.5v1.5H10a.5.5 0 0 1 0 1H8.5V10a.5.5 0 0 1-1 0V8.5H6a.5.5 0 0 1 0-1h1.5V6a.5.5 0 0 1 .5-.5z"/>
  </svg>
  
  <svg width="1em" height="1em" viewBox="0 0 16 16" class="bi bi-cloud-plus-fill" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
    <path fill-rule="evenodd" d="M8 2a5.53 5.53 0 0 0-3.594 1.342c-.766.66-1.321 1.52-1.464 2.383C1.266 6.095 0 7.555 0 9.318 0 11.366 1.708 13 3.781 13h8.906C14.502 13 16 11.57 16 9.773c0-1.636-1.242-2.969-2.834-3.194C12.923 3.999 10.69 2 8 2zm.5 4a.5.5 0 0 0-1 0v1.5H6a.5.5 0 0 0 0 1h1.5V10a.5.5 0 0 0 1 0V8.5H10a.5.5 0 0 0 0-1H8.5V6z"/>
  </svg>
</div>

在它们之间进行过渡是可能的，但有点困难，因为它需要一些定位技巧。我们必须制作 parent position: relative; 以便 children 可以 position: absolute 坐在彼此之上。然后，我们利用 opacity 代替 display，而不是利用 showing/hiding，并为 opacity 属性:

放置一个 transition

.icon-wrapper {
  position: relative
  display: inline-block;
  height: 1em;
  width: 1em;
  font-size: 36px;
}

.icon-wrapper .bi {
  position: absolute;
  top: 0;
  left: 0;
  transition: opacity 1s;
}

.icon-wrapper .bi-cloud-plus-fill {
  opacity: 0;
}

.icon-wrapper .bi-cloud-plus {
  opacity: 1;
}

.icon-wrapper:hover .bi-cloud-plus-fill {
  opacity: 1
}

.icon-wrapper:hover .bi-cloud-plus {
  opacity: 0;
}

<div class="icon-wrapper">
  <svg width="1em" height="1em" viewBox="0 0 16 16" class="bi bi-cloud-plus" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
  <path fill-rule="evenodd" d="M4.406 3.342A5.53 5.53 0 0 1 8 2c2.69 0 4.923 2 5.166 4.579C14.758 6.804 16 8.137 16 9.773 16 11.569 14.502 13 12.687 13H3.781C1.708 13 0 11.366 0 9.318c0-1.763 1.266-3.223 2.942-3.593.143-.863.698-1.723 1.464-2.383zm.653.757c-.757.653-1.153 1.44-1.153 2.056v.448l-.445.049C2.064 6.805 1 7.952 1 9.318 1 10.785 2.23 12 3.781 12h8.906C13.98 12 15 10.988 15 9.773c0-1.216-1.02-2.228-2.313-2.228h-.5v-.5C12.188 4.825 10.328 3 8 3a4.53 4.53 0 0 0-2.941 1.1z"/>
    <path fill-rule="evenodd" d="M8 5.5a.5.5 0 0 1 .5.5v1.5H10a.5.5 0 0 1 0 1H8.5V10a.5.5 0 0 1-1 0V8.5H6a.5.5 0 0 1 0-1h1.5V6a.5.5 0 0 1 .5-.5z"/>
  </svg>
  
  <svg width="1em" height="1em" viewBox="0 0 16 16" class="bi bi-cloud-plus-fill" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
    <path fill-rule="evenodd" d="M8 2a5.53 5.53 0 0 0-3.594 1.342c-.766.66-1.321 1.52-1.464 2.383C1.266 6.095 0 7.555 0 9.318 0 11.366 1.708 13 3.781 13h8.906C14.502 13 16 11.57 16 9.773c0-1.636-1.242-2.969-2.834-3.194C12.923 3.999 10.69 2 8 2zm.5 4a.5.5 0 0 0-1 0v1.5H6a.5.5 0 0 0 0 1h1.5V10a.5.5 0 0 0 1 0V8.5H10a.5.5 0 0 0 0-1H8.5V6z"/>
  </svg>
</div>

最后一件事——这些 SVG 本身并不是特别容易访问。考虑利用 Bootstrap screen reader utilities 为可能不会浏览您网站的用户添加一些可访问的文本。

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