- Classes to apply during enter and leave animations are specified using the enterClass, enterActiveClass, enterToClass, leaveClass, leaveActiveClass,leaveToClassproperties. In addition in case the - target is an overlay, hideOnOutsideClick would be handy to hide the target if outside of the popup is clicked. + Classes to apply during enter and leave animations are specified using the enterFromClass, enterActiveClass, enterToClass, leaveFromClass, leaveActiveClass,leaveToClassproperties. In addition in + case the target is an overlay, hideOnOutsideClick would be handy to hide the target if outside of the popup is clicked.