Access CSS Style of Element after Event

Hi,
I´m trying to change CSS properties after ionChange Event, but I can´t find the ID of that Element.
How is that done in Ionic and how do I change CSS properties ?

Regards

Angular doesn’t want you to think that way. Instead use ngClass or just bind [style.whatever] in the template, and then just change a property in the controller and let Angular’s change detection do the rest.