1. Dart
2. dart:html
3. WindowBase
4. closed property

##### WindowBase class

1. Constructors
2. WindowBase
3. Properties
4. closed
5. history
6. location
7. opener
8. parent
9. top
10. hashCode
11. on
12. runtimeType
13. Methods
14. close
15. postMessage
16. addEventListener
17. dispatchEvent
18. noSuchMethod
19. removeEventListener
20. toString
21. Operators
22. operator ==

# 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;