String value
) Determine if this element contains the class value.
This is the Dart equivalent of jQuery's hasClass.
value must be a valid 'token' representing a single class, i.e. a
non-empty string containing no whitespace.
Source
/**
* Determine if this element contains the class [value].
*
* This is the Dart equivalent of jQuery's
* [hasClass](http://api.jquery.com/hasClass/).
*
* [value] must be a valid 'token' representing a single class, i.e. a
* non-empty string containing no whitespace.
*/
bool contains(String value);