Don't seem to work with Exoskeleton

[pirj]

var U = Backprop.Model.extend({})
u=new U()
u.on('change', function(){console.log('changed')})
u.set('a', 1)
changed 
u.a
undefined
u.b=3
3 // notice no 'changed' event too
u.get('b')
undefined

[pirj]

Got the trick, need to define these properties first in model.

[af]

Thanks for following up! Unfortunately backprop can only manage properties that are created ahead of time. Let me know if you think the docs are unclear on this, maybe I should add a note.

[pirj]

Yes, probably. I had to fall back to Backbone and walk through example from README to realize that.