1. Dart
2. dart:html
3. CacheStorage
4. has method

##### CacheStorage class

1. Properties
2. hashCode
3. runtimeType
4. Methods
5. delete
6. has
7. keys
8. match
9. noSuchMethod
10. open
11. toString
12. Operators
13. operator ==

description

# has method Null safety

Future has (

1. String cacheName

)

## Implementation

    Future has(String cacheName) =>
        promiseToFuture(JS("", "#.has(#)", this, cacheName));