{{>reverse-source-html}}

<script type="text/javascript">

YUI().use('anim', function(Y) {

var module = Y.one('#demo');

// add fx plugin to module body

var content = module.one('.yui3-bd').plug(Y.Plugin.NodeFX, {

from: { height: 1 },

to: {

height: function(node) { // dynamic in case of change

return node.get('scrollHeight'); // get expanded height (offsetHeight may be zero)

}

},

easing: Y.Easing.easeOut,

duration: 0.5

});

var onClick = function(e) {

module.toggleClass('yui3-closed');

content.fx.set('reverse', !content.fx.get('reverse')); // toggle reverse

content.fx.run();

};

// use dynamic control for dynamic behavior

var control = Y.Node.create(

'<a title="collapse/expand module" class="yui3-toggle">' +

'<em>toggle</em>' +

'</a>'

);

// append dynamic control to header section

module.one('.yui3-hd').appendChild(control);

control.on('click', onClick);

});

</script>