Question

I’m getting an error when trying to emulate an YUI Anim sample:

<script src="http://yui.yahooapis.com/3.0.0/build/yui/yui-min.js"></script>
<script>
   YUI().use('anim-base', function(Y){
      var anim =  new Y.Anim({
         node: '.notice',
         to: {height: 300},
         easing: Y.Easing.backIn
      });

      onClick = function(e){
         e.preventDefault();
         anim.run();
      };

      Y.get('.notice').on('click', onClick);
   });
</script>

The error is:

Y.Easing is undefined easing:
Y.Easing.backIn\r\n

I was under the impression that YUI loader would retrieve the needed files.

Answer 1

I got my answer from the YUI Library forum which I will quote:

YUI will load listed modules a their
requirements automatically, however,
it will not do any kind of
full-fledged feature detection to
discover if something else have been
used.

You need to change the module list in
your use statement from anim-base to
anim (or add anim-easing). Then your
example will work.
–Stefan