1. Dart
2. dart:html
3. DomTokenList
4. contains method

##### DomTokenList class

1. Properties
2. hashCode
3. length
4. runtimeType
5. value
6. Methods
7. add
8. contains
9. item
10. noSuchMethod
11. remove
12. replace
13. supports
14. toggle
15. toString
16. Operators
17. operator ==

description

# contains method Null safety

bool contains (

1. String token

)

## Implementation

    bool contains(String token) native;