changeData event should fired on properties that are changed when calling .data(object)

[thetimbanks]

When calling .data(key, value) a changeData event is fired on the "key" property. However, when calling .data(object), changeData does not get fired for any property inside of object.

This can be very useful when using datalink. View the associated jsFiddle below to get an idea of how this can be beneficial.

​http://jsfiddle.net/yVaMx/1/

[dmethvin]

This would be very expensive. You can either duck-punch .data() to add it, or create your own function that calls .data() internally.