Arguments for the
activate event of the Stepper.
The index of the activated step in the
The DOM event that triggered the step activation.
The Stepper that triggered the event.
The activated step.
true if the event was prevented
by any of its subscribers.
true if the default action was prevented.
Prevents the default action for a specified event.
In this way, the source component suppresses
the built-in behavior that follows the event.