       <code class="param-name">event</code>
                        <span class="type">Event</span>
                    

                    

                    <div class="param-description">
                        <p>a touch or mouse Event</p>

                    </div>

                    
                </li>
            
                <li class="param">
                    
                        <code class="param-name">canvas</code>
                        <span class="type"><a href="https