import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Test: transform: perspective(0)</title>
<link rel="author" title="Xidorn Quan" href="https://www.upsuper.org">
<link rel="author" title="Mozilla" href="https://www.mozilla.org">
<link rel="help" href="https://drafts.csswg.org/css-transforms-2/#funcdef-perspective">
<meta name="assert" content="perspective(0) should behave like identity transform function.">
<link rel="match" href="reference/green.html">
<style>
#cover-me, #test {
width: 100px;
height: 100px;
}
#cover-me {
background: red;
position: relative;
margin-bottom: -100px;
}
#test {
background: green;
/* This should be an identity transform, since perspective(0) must be
* treated as perspective(infinity), and consequently translateZ()
* doesn't have any effect, so that it covers up #cover-me.
* If perspective(0) is invalid, #test would not create a stacking
* context, and #cover-me would be placed on top of #test showing red.
* If perspective(0) is handled as perspective(epsilon), #test would
* be invisible. */
transform: perspective(0) translateZ(50px);
}
</style>
<p>Pass if there is NO red below:</p>
<div id="cover-me"></div><div id="test"></div>