1. Dart
2. dart:html
3. Range
4. startOffset property

Range class

1. Constructors
2. Range
3. fromPoint
4. Properties
5. collapsed
6. commonAncestorContainer
7. endContainer
8. endOffset
9. startContainer
10. startOffset
11. hashCode
12. runtimeType
13. Methods
14. cloneContents
15. cloneRange
16. collapse
17. compareBoundaryPoints
18. comparePoint
19. createContextualFragment
20. deleteContents
21. detach
22. expand
23. extractContents
24. getBoundingClientRect
25. getClientRects
26. insertNode
27. isPointInRange
28. selectNode
29. selectNodeContents
30. setEnd
31. setEndAfter
32. setEndBefore
33. setStart
34. setStartAfter
35. setStartBefore
36. surroundContents
37. noSuchMethod
38. toString
39. Operators
40. operator ==
41. Static properties
42. supportsCreateContextualFragment
43. Constants
44. END_TO_END
45. END_TO_START
46. START_TO_END
47. START_TO_START

int get startOffset native;