Configure Parsley using Javascript, not html data attributes

How do I configure Parsley using javascript, not html data attributes?

The documentation examples show how to configure the Parsley form instance and some global field options using JS, but I want to be able to add and configure all field instances that way too. I don't want to use the html data attributes. Is that possible?

I think this question is driving at the same problem, How to use ParsleyJS 2.* using javascript and not data attributes, but it's not 100% clear.