opener property

WindowBase opener

A reference to the window that opened this one.

Window thisWindow = window;
WindowBase otherWindow = thisWindow.open('http://www.example.com/', 'foo');
print(otherWindow.opener == thisWindow); // 'true'

Source

WindowBase get opener;

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-html/WindowBase/opener.html