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'
WindowBase get opener;
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-html/WindowBase/opener.html