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

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