Having trouble setting up ionic

Hi all,

Here is a jsfiddle: http://jsfiddle.net/tzcpkcja/
I copied from: http://ionicframework.com/docs/api/directive/ionList/

I included ionic.bundle.js and ionic.css. The button seems to go through, but not the header/list. Am I missing an important step to setting up ionic?

Thank you.

Hmm, not sure why it doesn’t work on jsfiddle, but it works on codepen