Using parsley js to validate form

I must be overthinking this or something. I've read all over the parsley form validation site and, as far as I can tell, it simply passively responds to attributes set up in the DOM. It needs another component to actually change those attributes before one has a working form. Since I'm using Angular, presumably, this is parsleyJS for Angular.

I'm trying to have my SAVE button disabled until the form is valid. I would think that this would be Form Validation 102.

Their super-simple demo doesn't even have a save button and it doesn't bother showing any CSS, so frankly I'm not sure exactly what it is supposed to be demonstrating. If I've got to write the CSS and the form validation, I'm not sure what parsley is actually doing for me. http://parsleyjs.org/doc/examples/simple.html

What I'd really like is to find some plunkers showing parsley actually working end-to-end, but they don't seem to believe in plunkers. I don't seem to find an example where the form is actually validating and setting some value to true or false that I can capture to use in my controller.

(This sounds negative, but I'm not really down on parsley, I'm just stumped and time is running out.)