css/css-transitions/transition-delay-003-manual.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Transition Test: transition-delay - negative number</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" title="2.4. The 'transition-delay' Property" href="http://www.w3.org/TR/css3-transitions/#transition-delay-property">
<meta name="assert" content="Test checks that the 'transition-delay' property set negative number will not delay the execution of transition">
<style>
  div {
    height: 100px;
    transition-property: background-color;
    width: 100px;
  }
  #ref {
    background-color: gray;
    transition-delay: 3s;
  }
  #test {
    background-color: blue;
    transition-delay: -3s;
  }
</style>
<body>
  <p>Click the blue square below. Test passes if the <strong>color</strong> of blue and gray squares is all changed to <strong>green</strong> immediately
  when the number inside blue square is 3.</p>
  <div id="ref"></div>
  <div id="test">0</div>
  <script>
    var clicked = 0;
    var ref = document.getElementById("ref");
    var test = document.getElementById("test");
    test.addEventListener("click", function(evt) {
      if (clicked == 0) {
        ref.setAttribute("style", "background-color: green;");
        setInterval(function() {
          if (clicked == 2) {
            test.setAttribute("style", "background-color: green;");
          }
          clicked++;
          test.innerHTML = clicked;
        }, 1000);
      }
    }, false);
  </script>
</body>