Helpers function for all events related to focus/blur of CCV field for card flipping effects. See examples in the demo folder of the git repo for some example on how to use this module.
onFocus event for the CCV field.
This will update the focus state of the ccv field to True in the internal state
onBlur event for the CCV field.
This will update the focus state of the ccv field to False in the internal state
Helper function to update the focus state of the ccv field in the internal state