What is the significance of Nora slamming the door on Helmer at the end of the play?

What is the significance of Nora slamming the door on
Helmer at the end of the play?
Disillusioned by his own society and country, Ibsen together with his son and wife, boarded a ship and left Norway, figuratively slamming the door behind him. Fifteen years later a similarly disillusioned Nora Helmer would slam the door on stage at the end of A Dolls House, helping to change the course of modern drama.
It was A Dolls House, which carried his name beyond Scandinavia and to the remotest parts of civilization. It was a play that's attacked marriage from the standpoint of feminine individuali…