1. Dart
2. dart:html
3. StylePropertyMap
4. append method

##### StylePropertyMap class

1. Properties
2. hashCode
3. runtimeType
4. Methods
5. append
6. delete
7. get
8. getAll
9. getProperties
10. has
11. noSuchMethod
12. set
13. toString
14. Operators
15. operator ==

description

# append method Null safety

void append (

1. String property,
2. Object value

)

## Implementation

    void append(String property, Object value) native;