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

@DomName('Window.opener')
@DocsEditable()
WindowBase get opener => _convertNativeToDart_Window(this._get_opener);
void opener=(Window value)

Source

set opener(Window value) {
  JS("void", "#.opener = #", this, value);
}