A short and very dirty script I wrote for TamperMonkey that keeps an eye on the size of your ViewState and alerts you if it gets a bit big. I appreciate this could be a lot better written feel free to take and adapt and improve – although let me know as well please!
Don’t forget to change the @match parameter
// ==UserScript== // @name Monitor ViewState size // @namespace http://tampermonkey.net/ // @version 0.1 // @description Monitors ViewState on page and alerts you if it gets big! // @author Rob Church // @require https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.6.15/browser-polyfill.min.js // @require https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.6.15/browser.min.js // @match http://*.yourdomain.com/* // ==/UserScript== /* jshint ignore:start */ var inline_src = (<><![CDATA[ /* jshint ignore:end */ /* jshint esnext: true */ var allowedViewStateSize = 5000; var alerted = false; var viewStateSize = document.querySelector('#__VIEWSTATE').value.length; if (viewStateSize > allowedViewStateSize) { alert('Viewstate is large: ' + viewStateSize); alerted = true; } window.setInterval(function(){ var viewStateSize = document.querySelector('#__VIEWSTATE').value.length; if ((viewStateSize > allowedViewStateSize) && (alerted == false)) { alert('Viewstate has *BECOME* large: ' + viewStateSize); alerted = true; } }, 2000); /* jshint ignore:start */ ]]></>).toString(); var c = babel.transform(inline_src); eval(c.code); /* jshint ignore:end */