css/css-round-display/polar-origin-left-bottom-001.html

<!DOCTYPE html>
<html>
 <head>
  <title>CSS Test: Origin of Coordinates</title>
  <link rel="author" title="Jihye Hong" href="mailto:jh.hong@lge.com" />
  <link rel="help" href="https://www.w3.org/TR/2016/WD-css-round-display-1-20160301/#polar-origin-property" />
  <meta name="assert" content="Test checks that the origin of the coordinate system specified with 'polar-origin'." />
  <style type="text/css">
    .container {
      width: 200px;
      height: 200px;
      border: medium solid black;
    }
    .item {
      position: absolute;
      polar-origin: left bottom;
      polar-distance: 0px;
      polar-angle: 90deg;
      width: 50px;
      height: 50px;
      background-color: red;
    }
  </style>
 </head>
 <body>
  <p>Test passes if the center of a red box is positioned at the left-side bottom corner of the containing block.<br>
  The element is positioned using polar coordinates and the origin of coordinates is the left-side bottom corner of the containing block's left edge.</p>
  <div class="container">
    <div class="item"></div>
  </div>
 </body>
</html>