transition-helper
NOTE: this package is a proof-of-concept. For a fuller-featured package that wraps uihooks in a nice API, we suggest you check out https://atmospherejs.com/percolate/momentum
This is a basic proof-of-concept package that uses the _uihooks for Meteor Devel.
What it gives you is a basic {{#transition}} helper -- which if you wrap around an {{#each}} or a {{#if}} will animate the removal / addition (and eventually movement) of elements using CSS Transitions.
Check out the basic-example for a simple usage.
Important
You must have a transition defined for the element on the .off-screen -> not .off-screen class change. If you don't, there be dragons.