title: jQuery .slideUp() and .slideDown() equivalent in Angular2
body: <p>Can you please guide me on how to create a custom animation in Angular2 equivalent to jQuery <a href="http://api.jquery.com/slideup/" rel="nofollow noreferrer">.slideUp()</a> and <a href="http://api.jquery.com/slidedown/" rel="nofollow noreferrer">.slideDown()</a>. I know I can use jQuery plugin for this, but many folks recommend not to use it. So I'm looking for an alternate method to create these animations. The slideUp and slideDown will make any div collapsible with smooth animation on click of some button.</p>