1. Dart
2. dart:html
3. PointerEvent
4. isPrimary property

PointerEvent class

1. Constructors
2. PointerEvent
3. Properties
4. height
5. isPrimary
6. pointerId
7. pointerType
8. pressure
9. tangentialPressure
10. tiltX
11. tiltY
12. twist
13. width
14. altKey
15. bubbles
16. button
17. buttons
18. cancelable
19. client
20. composed
21. ctrlKey
22. currentTarget
23. dataTransfer
24. defaultPrevented
25. detail
26. eventPhase
27. fromElement
28. hashCode
29. isTrusted
30. layer
31. matchingTarget
32. metaKey
33. movement
34. offset
35. page
36. path
37. region
38. relatedTarget
39. runtimeType
40. screen
41. shiftKey
42. sourceCapabilities
43. target
44. timeStamp
45. toElement
46. type
47. view
48. Methods
49. getCoalescedEvents
50. composedPath
51. getModifierState
52. noSuchMethod
53. preventDefault
54. stopImmediatePropagation
55. stopPropagation
56. toString
57. Operators
58. operator ==
59. Static properties
60. supported

bool get isPrimary native;