                 <tr><td><code>$duration-medium</code></td><td><small class="var-tag">duration</small></td><td><code>400ms</code></td></tr>
                            <tr><td><code>$duration-medium-up</code></td><td><small class="var-tag">duration</small></td><td><code>450ms</code></td></tr>
                            <tr><td><code>$duration-long</code></td><td><small class="var-tag">duration</small></td><td><code>700ms</code></td></tr>
                            <tr><td><code>$duration-long-up</code></t