/**
* Remove a class name from this element's {@code class} attribute.
*
* @param className class name to remove
* @return this element
*/
public Element removeClass(String className) {
Validate.notNull(className);
Set<String> classes = classNames();
classes.remove(className);
classNames(classes);
return this;
}
/**
* Toggle a class name on this element's {@code class} attribute: if present, remove it; otherwise
* add it.
*
* @param className class name to toggle
* @return this element
*/
public Element toggleClass(String className) {
Validate.notNull(className);
Set<String> classes = classNames();
if (classes.contains(className)) classes.remove(className);
else classes.add(className);
classNames(classes);
return this;
}