1. Dart
2. dart:html
3. DataTransferItemList
4. length property

DataTransferItemList class

1. Properties
2. length
3. hashCode
4. runtimeType
5. Methods
6. add
7. addData
8. addFile
9. clear
10. item
11. remove
12. noSuchMethod
13. toString
14. Operators
15. operator []
16. operator ==

int get length native;