addClassNames could return the element itself

[dyoxyne]

It could be nice if addClassNames could return the element itself.

btnCreate = row.appendChild(new Button('CREATE')).addClassNames('col-lg-3');

[ronkorving]

Agreed, the code above currently wouldn't work, because addClassNames doesn't return the created button. So people often end up passing class names to constructors instead (to keep the call-site short). The extra code in the constructor is useless, and it doesn't really make the user APIs any cleaner.