如何使用转换覆盖CSS Z索引堆栈上下文?[duplicate]

1qczuiv0  于 2022-11-26  发布在  其他
关注(0)|答案(3)|浏览(93)

此问题在此处已有答案

Why can't an element with a z-index value cover its child?(5个答案)
2天前关闭。
我想把红色方块放在表的顶部。我读过关于Z索引堆栈上下文和这个堆栈溢出Override CSS Z-Index Stacking Context的文章。我想有一种方法可以用变换的东西来解决它。但是在我的情况下它不起作用。如果你有一些建议的话会很有帮助的。谢谢。

  • 超文本标记语言
<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Home</title>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width" />
    <link rel="stylesheet" href="styles.css" />
    <script type="module" src="script.js"></script>
  </head>
  <body>
    <div class="top">
      <table>
        <thead>
          <tr>
            <th colspan="2">The table header</th>
          </tr>
        </thead>
        <tbody>
          <tr>
            <td>The table body</td>
            <td>with two columns</td>
          </tr>
        </tbody>
      </table>
    </div>
    <div class="bottom">
      <div>
        <div><span class="red">Red</span></div>
        <div><span class="green">Green</span></div>
        <div><span class="blue">Blue</span></div>
      </div>
    </div>
  </body>
</html>
  • CSS
.top {
  z-index: 2;
  position: relative;
}
.bottom {
  z-index: 1;
  position: relative;
}
table,
td {
  border: 1px solid #333;
  z-index: 4;
  position: relative;
  background-color: #fff;
}
thead,
tfoot {
  background-color: #333;
  color: #fff;
}
.red,
.green,
.blue {
  position: absolute;
  width: 100px;
  color: white;
  line-height: 100px;
  text-align: center;
}
.red {
  z-index: 111;
  top: -40px;
  left: 20px;
  background: red;
  transform: translateZ(1px);
}
.green {
  top: -20px;
  left: 60px;
  background: green;
}
.blue {
  top: -10px;
  left: 100px;
  background: blue;
}
body,
div:first-child {
  transform-style: preserve-3d;
}
yqkkidmi

yqkkidmi1#

在这里你可以试试这个逻辑:我已经修改了css,只是在div:first-child的最后一行添加了z-index。
[![在此处输入图像说明][1]][1]
[1]:

<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Home</title>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width" />
    <link rel="stylesheet" href="styles.css" />
    <script type="module" src="script.js"></script>
  </head>
  <style>
    .top {
      z-index: 2;
      position: relative;
    }
    .bottom {
      z-index: 1;
      position: relative;
    }
    table,
    td {
      border: 1px solid #333;
      z-index: 4;
      position: relative;
      background-color: #fff;
    }
    thead,
    tfoot {
      background-color: #333;
      color: #fff;
    }
    .red,
    .green,
    .blue {
      position: absolute;
      width: 100px;
      color: white;
      line-height: 100px;
      text-align: center;
    }
    .red {
      z-index: 111;
      top: -40px;
      left: 20px;
      background: red;
      transform: translateZ(1px);
    }
    .green {
      top: -20px;
      left: 60px;
      background: green;
    }
    .blue {
      top: -10px;
      left: 100px;
      background: blue;
    }
    body,
    div:first-child {
      z-index: -1;
      transform-style: preserve-3d;
    }
  </style>
  <body>
    <div class="top">
      <table>
        <thead>
          <tr>
            <th colspan="2">The table header</th>
          </tr>
        </thead>
        <tbody>
          <tr>
            <td>The table body</td>
            <td>with two columns</td>
          </tr>
        </tbody>
      </table>
    </div>
    <div class="bottom">
      <div>
        <div><span class="red">Red</span></div>
        <div><span class="green">Green</span></div>
        <div><span class="blue">Blue</span></div>
      </div>
    </div>
  </body>
</html>

m/Rxs7O.png

w6mmgewl

w6mmgewl2#

我通过注解掉你的一些CSS来得到你想要的东西。我没有添加任何新的东西。
请参阅下面的代码片段或查看my fork of your stackblitz
第一个

uxhixvfz

uxhixvfz3#

第一个
编辑了你的一些代码,z-index也接受负数,并删除了代码:

body,
div:first-child {
  transform-style: preserve-3d;
}

https://jsfiddle.net/d3x746bc/1/

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