testing/web-platform/tests/css/css-transforms/3d-rendering-context-and-z-ordering-001.html


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<!DOCTYPE HTML>
<title>CSS Test (Transforms): Sorting outside of the 3-D Rendering Context</title>
<link rel="author" title="L. David Baron" href="https://dbaron.org/">
<link rel="author" title="Google" href="http://www.google.com/">
<link rel="help" href="http://www.w3.org/TR/css-transforms-2/#3d-transform-rendering">
<meta name="assert" content="The #wrapper element is the root of the 3-D rendering context, so #tooltip should render on top of it per normal CSS z-ordering rules.">
<link rel="match" href="transform-lime-square-ref.html">
<style>

#contain {
  position: relative;
  padding-top: 5px;
}

#wrapper {
  width: 30px;
  height: 30px;
  margin-top: 20px;
  margin-left: 20px;
}

#cube {
  width: 15px;
  height: 15px;
  transform-style: preserve-3d;
}

#face {
  width: 15px;
  height: 15px;
  transform: translateZ(75px);
  background: red;
}

#tooltip {
  position: absolute;
  background: lime;
  width: 100px;
  height: 100px;
  top: 0;
  left: 0;
}

</style>

<div id="contain">
  <div id="wrapper">
    <div id="cube">
      <div id="face"></div>
    </div>
  </div>

  <div id="tooltip"></div>
</div>