tests/wpt/css-tests/css-transforms-1_dev/html/transform-inherit-origin-001.htm


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<!DOCTYPE html>
<html><head>
    <title>CSS Test (Transforms): "transform-origin: inherit" and em</title>
    <link href="mailto:ayg@aryeh.name" rel="author" title="Aryeh Gregor">
    <link href="http://www.w3.org/TR/css-transforms-1/#transform-origin-property" rel="help">
    <meta content="The 'transform-origin'
    property's computed value (which is what's inherited if
    'inherit' is specified) is defined as &quot;For <length> the
    absolute value, otherwise a percentage.&quot;  In this test, a parent element
    has a transform-origin of '5em 10em' with a font-size of 10px, and
    the child has &quot;transform-origin: inherit&quot;.  Since the relative length of
    5em is converted to an absolute length before inheritance, the
    transform-origin should be at the bottom of the child, 50px 100px.  The
    180deg rotation should thus effectively move the child down 100px.  An
    implementation that incorrectly inherited the transform-origin value before
    converting to an absolute length would treat it as 100px 200px, since the
    child has a font-size of 20px, so it would effectively translate the child
    100px right and 300px down." name="assert">
    <link href="reference/transform-inherit-origin-ref.htm" rel="match">
    <style>
      body {
        font-size: 10px;
        transform-origin: 5em 10em;
      }
      div {
        height: 100px;
        width: 100px;
        font-size: 20px;
        transform: rotate(180deg);
        transform-origin: inherit;
        background: blue;
      }
    </style>
  </head>
  <body>
    <div></div>
  

</body></html>