1. Dart
2. dart:html
3. PushSubscription
4. expirationTime property

##### PushSubscription class

1. Properties
2. endpoint
3. expirationTime
4. hashCode
5. options
6. runtimeType
7. Methods
8. getKey
9. noSuchMethod
10. toString
11. unsubscribe
12. Operators
13. operator ==

description

# expirationTime property Null safety

int? expirationTime

## Implementation

    int? get expirationTime native;