Now we've bound the user controls to the data model and automatically save it every time a change is made. There's one problem with this though. Input controls like the number or time types that have spinners associated with them cause a change event every time a spinner button is clicked. If the user holds a spinner button down it will fire change events at an alarming rate. This will in turn save the task list to localStorage repeatedly in a very short period of time. That doesn't seem like a very efficient thing to do, especially if you have a lot of data.