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/Dart 2

closed property

bool closed

Indicates whether this window has been closed.

print(window.closed); // 'false'
window.close();
print(window.closed); // 'true'

Implementation

bool get closed;

© 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/closed.html