tests/wpt/css-tests/css-transforms-1_dev/html/transform-abspos-002.htm


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<!DOCTYPE html>
<html><head>
    <title>CSS Test (Transforms): Containing Block for Fixed Positioning (left/top offsets)</title>
    <link href="mailto:keith@keithschwarz.com" rel="author" title="Keith Schwarz">
    <link href="mailto:ayg@aryeh.name" rel="author" title="Aryeh Gregor">
    <link href="http://www.w3.org/TR/css-transforms-1/#transform-rendering" rel="help">
    <meta content="&quot;In the HTML namespace, any value other than
    'none' for the transform results in the creation of . . . a
    containing block. The object acts as a containing block for fixed
    positioned descendants.&quot;  This means fixed-position elements need to be
    rooted at a transformed ancestor, rather than the viewport." name="assert">
    <link href="reference/transform-abspos-ref.htm" rel="match">
    <style>
      body > div {
        width: 100px;
        height: 200px;
        transform: translate(50px, 50px);
        background: gold;
      }
      body > div > div {
        width: 200px;
        height: 100px;
        position: fixed;
        left: 50px;
        top: 100px;
        background: navy;
        color: gold;
      }
    </style>
  </head>
  <body>
    <div>
      A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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      </div>
    </div>
  

</body></html>