       <!-- elements used for testing -->
        <div id="fixture" class="fixture">
            <div class="container">
                <div class="transition">Text sample</div>
            </div>
        </div>
        <div id="offscreen"></div>

        <!--
            SEE ./support/README.md for an abstract explanation of the test procedure
            http://test.csswg.org/source/contributors/rodneyrehm/submitted/css3-transitions/README.md
        -->

        <script>
            // http://www.w3.org