docs/partials/transition-basic-source.mustache

<div id="demo">
    <a href="#" title="run the animation"></a>
</div>

<script type="text/javascript">
YUI().use('transition', function(Y) {
    var node = Y.one('#demo');

    node.one('a').on('click', function(e) {
        e.preventDefault();

        node.transition({
            duration: 1, // seconds
            easing: 'ease-out',
            height: 0,
            width: 0,
            left: '150px',
            top: '100px',
            opacity: 0
        }, function() {
            this.remove();
        });
    });
});
</script>