css/motion/offset-path-url-009.html

<!DOCTYPE html>
<html>
  <head>
    <title>CSS Motion Path: offset-path:url() with padding-box</title>
    <link rel="help" href="https://drafts.fxtf.org/motion/#valdef-offset-path-url">
    <link rel="match" href="offset-path-url-008-ref.html">
    <meta name="assert" content="This tests that url() using padding-box
      generates a rotation and translation.">
    <style>
      #outer {
        width: 300px;
        height: 100px;
        padding: 50px;
        border: 50px solid black;
      }
      #target {
        position: relative;
        /**
         * offset-path:url() references to the svg element and treats coord-box
         * as its user coordinate system. And the svg element always gives it
         * the offset starting position (based on the svg attributes). So the
         * transformed box should ignore its current position from CSS layout.
         * Intentionally use left property to make sure we ignore it.
         */
        left: 100px;
        width: 50px;
        height: 50px;
        background-color: green;
        offset-path: url(#svgRect) padding-box;
        offset-distance: 0%;
        border-radius: 50% 50% 0 0;
      }
    </style>
  </head>
  <body>
    <div id="outer">
      <div id="target"></div>
    </div>
    <svg width="400" height="200" xmlns="http://www.w3.org/2000/svg">
      <defs>
        <rect id="svgRect" width="100" height="100" x="100" y="50"/>
      </defs>
    </svg>
  </body>
</html>