How to disable JS validation before submit button is clicked

It’s getting really annoying that JS validates fields before I click the submit button.
Is there a way that JS only validates the fields when the submit button is clicked. It’s before the AJAX request anyway right?

Also the validation fires on all radio elements. The plugin doesn’t render the radio elements if I use [radio*]. Does that mean all radio elements are compulsory despite that they are not compulsory?

Thanks