1. Dart
2. dart:html
3. IntersectionObserver
4. rootMargin property

##### IntersectionObserver class

1. Constructors
2. IntersectionObserver
3. Properties
4. hashCode
5. root
6. rootMargin
7. runtimeType
8. thresholds
9. Methods
10. disconnect
11. noSuchMethod
12. observe
13. takeRecords
14. toString
15. unobserve
16. Operators
17. operator ==

description

# rootMargin property Null safety

String? rootMargin

## Implementation

    String? get rootMargin native;