Blitz - WPT: preserve3d-and-flattening-z-order-005.html

wpt / css / css-transforms / preserve3d-and-flattening-z-order-005.html

/css/css-transforms/preserve3d-and-flattening-z-order-005.html

<!DOCTYPE HTML>
<meta charset="utf-8">
<title>CSS Test (Transforms): Flattening at the leafward edges of a preserve-3d scene</title>
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1255544">
<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="Elements are drawn in the correct z-order.">
<link rel="match" href="reference/green.html">

<style>
div, span {
  height: 100px;
  width: 100px;
  background: red;
}
span {
  display: inline-block;
  vertical-align: top;
}
div:not(:first-child):not(.outer) {
  /* put everything at the same position without using absolute positioning */
  margin-top: -100px;
}
.outer, .sibling {
  transform-style: preserve-3d;
}
.sibling {
  transform: translateZ(-10px);
}
.child {
  will-change: transform;
  position: relative;
  z-index: -1;
}
</style>

<p>Pass if there is NO red below:</p>

<div class="outer">
  <div class="sibling"></div>
  <div class="flattener"><span style="background: green"></span><div class="child"></div><div></div></div>
  <div class="flattener"><div class="child"></div><div></div></div>
</div>

/css/css-transforms/reference/green.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Reference: A green box</title>
<link rel="author" title="Xidorn Quan" href="https://www.upsuper.org">
<link rel="author" title="Mozilla" href="https://www.mozilla.org">
<p>Pass if there is NO red below:</p>
<div id="ref" style="width: 100px; height: 100px; background: green"></div>