css/css-transitions/reference/transition-test-ref.html

<!DOCTYPE html>
<html>
<head>
    <title>CSS Transition Reference File</title>
    <link rel="author" title="Oleg Janeiko" href="mailto:oleg@the-incredible.me">
    <style type="text/css">
        .container {
            background-color: red;
            height: 200px;
            width: 200px;
        }
        .box {
            width: 100px;
            height: 100px;
            background-color: green;

            transition-property: width;
            transition-duration: 0;
        }
        .box.transition {
            width: 200px;
            height: 200px;
        }
    </style>
    <script type="text/javascript" charset="utf-8">
        function ready(){
            var box = document.querySelector('.box');
            box.className = 'box transition';
        }
    </script>
</head>
<body onload="ready();">
    <div>
        <p>You should not see a red background during the transition. Note: if the test passes transition is instant.</p>
    </div>
    <div class="container">
        <div class="box"></div>
    </div>
</body>
</html>