postal.js/lib/standard/postal.diagnostics.min.js

(function(a,b,c){a.diagnostics=a.addWireTap(function(a,c){var d=b.extend(c,{data:a});if(!JSON)throw"This browser or environment does not provide JSON support";try{console.log(JSON.stringify(d))}catch(e){try{d.data="ERROR: "+e.message,console.log(JSON.stringify(d))}catch(f){console.log("Unable to parse data to JSON: "+e)}}})})(postal,_)