Same code I'm using of dojo documentation
just downloaded code work fine but onchange event do not fire on my project.
I have make it to work by firing onblur onBlur: function(){alert(3)}
What thing may cause onchange event not fire?

var filteringSelect = new FilteringSelect({
        id: "stateSelect",
        name: "state",
        value: "CA",
        store: stateStore,
        searchAttr: "name",     
        onChange: function(){alert(3)}
    }, "stateSelect");