1. Dart
2. dart:html
3. SyncManager
4. register method

##### SyncManager class

1. Properties
2. hashCode
3. runtimeType
4. Methods
5. getTags
6. noSuchMethod
7. register
8. toString
9. Operators
10. operator ==

description

# register method Null safety

Future register (

1. String tag

)

## Implementation

    Future register(String tag) =>
        promiseToFuture(JS("", "#.register(#)", this, tag));