Ajax.BeginForm, Calls Action, Returns JSON, How do I access JSON object in my OnSuccess JS Function?

Question

Ajax.BeginForm calls an action and then returns JSON. How do I access JSON object in my OnComplete js function?

so my Ajax.BeginForm<

Answer 1

function OnSuccess(e) { //function CouponSubmitted(data) in the question
   var json = e.get_response().get_object();
   alert(json.success);
}

This is what the AJAX.BeginForm OnSuccess callback expects you to do to get your JSON back.

Hope I saved someone else some time on this ridiculously under documented "feature?".