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.
bool contains(Object value);
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-html/CssClassSet/contains.html