Bind: having data before change

[Marco]

You use it to bind to a viewModel:

viewModel.bind("change", function( event ){
    console.log("BIND:", event.field, "=", this.get(event.field));
});

this.get(event.field)
has the data just modified.

Is there a way to get the old data, before change?

Many thanks

[Neli]

Hi Marco,

The change event is fired after blurring the element whose value has changed. Thus, when the event is fired the old value is not available. In the event handler, you can not get the previous value of the element, but only the new one. What you could try is to add an additional field and save the initial value there. Then if needed you can update the value once a change is performed. 

Let me know in case you have additional questions on the matter.

Regards,
Neli
Progress Telerik