How can I make this work?

[thelinuxlich]

Didn't find anything on the documentation regarding viewmodel <-> component communication:

http://jsfiddle.net/tuL6A/11/

[etanxing]

I'm not familiar to jQuey.ui but you should define var self = this; and use self.list.splice(end, 0, vm.list.splice(start, 1)[0]); to access vm's data at least.

[thelinuxlich]

You're right, actually it was very simple: http://jsfiddle.net/tuL6A/33/