TODO app with sortableJS

I found literally everything difficult in this challenge. I've built like 5 different apps with different approaches but this one seemed to be the best (and only one working).

I tried implementing adjacentHTML but found it really hard to animate, so it was not so smooth. After that i decided to create todo element in js and append it to the list already created in DOM with document fragment. I read somewhere that doc fragment can result with better performance since the doc fragment is in memory and not part of the DOM tree itself.

If anyone has any comments on how to improve something, I'm all ears :D