悬停多个 SVG 多边形时的图像 z-index

Question

我正在研究 SVG，我的概念是我有两个图像.overlap，并使用 svg 多边形制作了五个不同的三角形。我的目标是实现第一次覆盖完整的图像显示，并且当悬停在三角形形状背景上时需要显示.box 框图像。 这是我在给出叠加图像之前的初始代码。

.box {
  position: relative;
  background-image: url('https://picsum.photos/id/1/1000/800');
  background-repeat: no-repeat;
  width: 100%;
  height: 600px;
  background-size: cover;
}

polygon {
  stroke-width: 1;
  stroke: red;
  fill: #ffffff;
}

polygon:hover {
  fill: transparent;
}

<div class="box">
  <svg viewbox="0 0 200 100">
		<polygon points="0,100 100,100 0,50 "
			    style="stroke:#000000;"/>
		<polygon points="0,50 100,100 50,00 0,0 "
			    style="stroke:#000000;"/>
		<polygon points="100,100 50,00 150,0"
			    style="stroke:#000000;"/>
		<polygon points="100,100 200,50 200,0 150,0"
			    style="stroke:#000000;"/>
		<polygon points="100,100 200,100, 200,50"
			    style="stroke:#000000;"/>
	</svg>
</div>

现在我添加了覆盖图像需要位于.box 图像和polygons 形状之上。现在，悬停我想像这样以当前多边形形状显示 .box 图像

代码在这里

.box {
  position: relative;
  background-image: url('https://picsum.photos/id/1/1000/800');
  background-repeat: no-repeat;
  width: 100%;
  height: 600px;
  background-size: cover;
}

polygon {
  stroke-width: 1;
  stroke: red;
  fill: #ffffff;
}

polygon:hover {
  fill: transparent;
}

.overlay:hover polygon {
  z-index: 100;
}

.overlay {
  position: absolute;
  background-image: url('https://picsum.photos/id/118/1000/800');
  background-repeat: no-repeat;
  width: 100%;
  height: 600px;
  background-size: cover;
  z-index: 10;
}

<div class="overlay"></div>
<div class="box">

  <svg viewbox="0 0 200 100">
		<polygon points="0,100 100,100 0,50 "
			    style="stroke:#000000;"/>
		<polygon points="0,50 100,100 50,00 0,0 "
			    style="stroke:#000000;"/>
		<polygon points="100,100 50,00 150,0"
			    style="stroke:#000000;"/>
		<polygon points="100,100 200,50 200,0 150,0"
			    style="stroke:#000000;"/>
		<polygon points="100,100 200,100, 200,50"
			    style="stroke:#000000;"/>
	</svg>
</div>

任何人都可以在悬停时帮我解决这个问题，我们需要调整 div 的 z-indexes 和多边形填充。

Answer 1

如果您希望 svg 出现在其父 div 上方，您可以更改 svg 元素的属性，如下所示：

   /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
   /*necessary for expanding .box div and svg*/
   /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
   html,body{
    width:100%;
    height:100%;
   }
   
   .box {
      width:100%;
      height:100%;
      
      position: relative;
      background-image: url('https://picsum.photos/id/1/1000/800');
      background-repeat: no-repeat;
      width: 100%;
      
      /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
      /*I CHANGED HEIGHT TO 100% FOR BOX AS IT WASNT SPANNING THE ENTIRE PAGE - in turn, the "overlay"
      div's background image could be seen...*/
      /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
      height: 100%;
      background-size: cover;
    }
    
    /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
    /*position the svg element relative to its parent so it can be moved up with z-index*/
    /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
    svg{
      position:relative;
      z-index:999;
    }

    polygon {
      stroke-width: 1;
      stroke: red;
      fill: #ffffff;
    }

    polygon:hover {
      fill: transparent;
    }

    .overlay:hover polygon {
      z-index: 100;
    }

    .overlay {
      position: absolute;
      background-image: url('https://picsum.photos/id/118/1000/800');
      background-repeat: no-repeat;
      width: 100%;
      height: 100%;
      background-size: cover;
      z-index: 10;
    }

<div class="overlay"></div>
<div class="box">

  <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
  <!--in order to make the svg span the entirety of its parent, I set width and height attributes
  for it to 100%-->
  <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
  <svg width="100%" height="100%" preserveAspectRatio="none" viewbox="0 0 200 100">
    <polygon points="0,100 100,100 0,50 "
          style="stroke:#000000;"/>
    <polygon points="0,50 100,100 50,0 0,0 "
          style="stroke:#000000;"/>
    <polygon points="100,100 50,00 150,0"
          style="stroke:#000000;"/>
    <polygon points="100,100 200,50 200,0 150,0"
          style="stroke:#000000;"/>
    <polygon points="100,100 200,100, 200,50"
          style="stroke:#000000;"/>
  </svg>
</div>

Answer 2

我会调整my previous answer的代码如下：

.box {
  width:450px;
  height:250px;
  position:relative;
  overflow:hidden;
  z-index:0;
  background:url(https://picsum.photos/id/13/1000/800) center/cover;
}
.box > div {
  position:absolute;
  top:0;
  left:0;
  right:0;
  bottom:0;
  background-size:cover;
  background-position:center;
  opacity:0;
}
.box > div:nth-child(1) {
  clip-path:polygon(20% 0,80% 0, 50% 100%);
}
.box > div:nth-child(2) {
  clip-path:polygon(0 0, 20% 0,50% 100%,0 40%);
}
.box > div:nth-child(3) {
  clip-path:polygon(100% 0,80% 0,50% 100%,100% 40%);
}

.box > div:nth-child(4) {
  clip-path:polygon(0 100%,50% 100%,0 40%);
}
.box > div:nth-child(5) {
  clip-path:polygon(100% 100%,50% 100%,100% 40%);
}

.box > div:hover {
   opacity:1;
}

<div class="box">
  <div style="background-image:url(https://picsum.photos/id/1/1000/800)"></div>
  <div style="background-image:url(https://picsum.photos/id/10/1000/800)"></div>
  <div style="background-image:url(https://picsum.photos/id/90/1000/800)"></div>
  <div style="background-image:url(https://picsum.photos/id/102/1000/800)"></div>
  <div style="background-image:url(https://picsum.photos/id/118/1000/800)"></div>
</div>

这是一个插图，向您展示clip-path中使用的不同点

同一张图片：

.box {
  width:450px;
  height:250px;
  position:relative;
  overflow:hidden;
  z-index:0;
  background:url(https://picsum.photos/id/13/1000/800) center/cover;
}
.box > div {
  position:absolute;
  top:0;
  left:0;
  right:0;
  bottom:0;
  background-image:url(https://picsum.photos/id/118/1000/800);
  background-size:cover;
  background-position:center;
  opacity:0;
}
.box > div:nth-child(1) {
  clip-path:polygon(20% 0,80% 0, 50% 100%);
}
.box > div:nth-child(2) {
  clip-path:polygon(0 0, 20% 0,50% 100%,0 40%);
}
.box > div:nth-child(3) {
  clip-path:polygon(100% 0,80% 0,50% 100%,100% 40%);
}

.box > div:nth-child(4) {
  clip-path:polygon(0 100%,50% 100%,0 40%);
}
.box > div:nth-child(5) {
  clip-path:polygon(100% 100%,50% 100%,100% 40%);
}

.box > div:hover {
   opacity:1;
}

<div class="box">
  <div ></div>
  <div ></div>
  <div ></div>
  <div ></div>
  <div ></div>
</div>

Answer 3

Temani's CSS only solution 很棒，但是请注意这是still not supported in Safari nor in IE/Edge。

对于这些浏览器，您需要回退到 SVG，它还实现了 <clipPath> 元素。

.overlay {
  background-image: url('https://picsum.photos/id/118/1000/800');
  background-repeat: no-repeat;
  background-size: cover;
}
.overlay use {
  opacity: 0;
}
.overlay use:hover {
  opacity: 1;
}

<svg class="overlay" viewBox="0 0 200 100">
  <defs>
    <clipPath id='clip-1'>
      <polygon points="0,100 100,100 0,50"/>
    </clipPath>
    <clipPath id='clip-2'>
      <polygon points="0,50 100,100 50,00 0,0"/>
    </clipPath>
    <clipPath id='clip-3'>
      <polygon points="100,100 50,00 150,0"/>
    </clipPath>
    <clipPath id='clip-4'>
      <polygon points="100,100 200,50 200,0 150,0"/>
    </clipPath>
    <clipPath id='clip-5'>
      <polygon points="100,100 200,100, 200,50"/>
    </clipPath>
    <image id="img" x="0" y="0" width="200" height="100" preserveAspectRatio="xMidYMid slice"
      xlink:href="https://picsum.photos/id/1/1000/800" />
  </defs>
  <use xlink:href="#img" clip-path="url(#clip-1)"/>
  <use xlink:href="#img" clip-path="url(#clip-2)"/>
  <use xlink:href="#img" clip-path="url(#clip-3)"/>
  <use xlink:href="#img" clip-path="url(#clip-4)"/>
  <use xlink:href="#img" clip-path="url(#clip-5)"/>
</svg>
<div class="box"></div>

所以，是的，它更冗长，但它应该适用于自 IE9 以来的所有浏览器。