1. Dart
2. dart:html
3. DomException
4. CONSTRAINT constant

DomException class

1. Properties
2. message
3. name
4. hashCode
5. runtimeType
6. Methods
7. toString
8. noSuchMethod
9. Operators
10. operator ==
11. Constants
12. ABORT
13. CONSTRAINT
14. DATA_CLONE
15. ENCODING
16. HIERARCHY_REQUEST
17. INDEX_SIZE
18. INVALID_ACCESS
19. INVALID_CHARACTER
20. INVALID_MODIFICATION
21. INVALID_NODE_TYPE
22. INVALID_STATE
23. NAMESPACE
24. NETWORK
25. NO_MODIFICATION_ALLOWED
26. NOT_ALLOWED
27. NOT_FOUND
28. NOT_READABLE
29. NOT_SUPPORTED
30. OPERATION
31. QUOTA_EXCEEDED
32. READ_ONLY
33. SECURITY
34. SYNTAX
35. TIMEOUT
36. TRANSACTION_INACTIVE
37. TYPE_ERROR
38. TYPE_MISMATCH
39. UNKNOWN
40. URL_MISMATCH
41. VERSION
42. WRONG_DOCUMENT

static const String CONSTRAINT = 'ConstraintError'