<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Transitions Test: transition-property - border-top-color</title>
<link rel="author" title="Intel" href="http://www.intel.com">
<link rel="author" title="Shiyou Tan" href="mailto:shiyoux.tan@intel.com">
<link rel="help" href="https://drafts.csswg.org/web-animations-1/#animation-type">
<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#border-color">
<meta name="assert" content="Test checks that the 'border-top-color' property is animatable.">
<style>
  #test {
    border: 10px solid red;
    height: 90px;
    transition-duration: 2s;
    transition-property: border-top-color;
    transition-timing-function: linear;
    width: 90px;
  }
</style>
<body>
  <p>Click the square with red border below. Test passes if the color of top border transforms to green gradually not immediately.</p>
  <div id="test"></div>
  <script>
    (function() {
      var div = document.querySelector("#test");
      div.addEventListener("click", function(evt) {
        div.setAttribute("style", "border-top-color: green;");
      }, false);
    })();
  </script>
</body>
