Tuesday, 25 September 2012

Dynamics CRM 2011 Reduce your javascript code footprint with Microsoft Ajax Minifier tool

Did you know about Microsoft Ajax Minifier tool? I use this tool for some time now and I think is great, it gives developers the chance to reduce their 'code footprint' by compressing javascript and css files.

You can download the tool here:

As customization in CRM 2011 are more flexible, developers have more functionality on their side to impress customers, it's easy to end up with long and complex javascript files which end up increasing the download and processing time; so a good practice in a production environment is to remove all comments and un-necessary spaces to compress the code, with Microsoft Ajax minifier tool, can do this for us and also minify the code compressing it to the optimal size.

The same concept as jquery-minimized version, I would recommend in a production environment minimize all your code to get optimal performance.

Below is an example of a normal javascript code from a previous post on a jquery duplicate detection pop-up.

function idp() {
var isCreateForm = Xrm.Page.ui.getFormType() == 1;
if (isCreateForm) {

A possible duplicate record was found, please review:

$('#name').focusout(function() {

var name = Xrm.Page.getAttribute('name').getValue();
var query = "/AccountSet?$filter=Name eq '"+name+"'";

var serverUrl = Xrm.Page.context.getServerUrl();

    if (serverUrl.match(/\/$/)) {
        serverUrl = serverUrl.substring(0, serverUrl.length - 1);

    var ODataURL = serverUrl + "/XRMServices/2011/OrganizationData.svc" + query;

        type: "GET",
        contentType: "application/json; charset=utf-8",
        datatype: "json",
        url: ODataURL,
        beforeSend: function (XMLHttpRequest) {
            XMLHttpRequest.setRequestHeader("Accept", "application/json");
        success: function (data, textStatus, XmlHttpRequest) {
           var entities = data.d.results;
    $.fx.speeds._default = 1000;
    $(document).ready(function() {
            autoOpen: false,
            show: "blind",
            hide: "explode",
            modal: true

if(entities.length > 0 ) {
  for( i=0; i< entities.length; i++)
     var entity = entities[i];

var entityUrl = "main.aspx?etn=account&pagetype=entityrecord&id=";
$(document).ready(function() {

        error: function (XmlHttpRequest, textStatus, errorObject) {
            alert("OData Execution Error Occurred");

Install Ajax minifier tool and from the command prompt run:
AjaxMin.exe idp_engine.js -out idp_engine_min.js

The end result will be something like this:

function idp(){var n=Xrm.Page.ui.getFormType()==1;if(n){$.ajaxSetup({cache:!1}),$(document.body).append(""),A,possible,duplicate,record,was,found,please;n:");";$("#name").focusout(function(){var r=Xrm.Page.getAttribute("name").getValue(),u="/AccountSet?$filter=Name eq '"+r+"'",n=Xrm.Page.context.getServerUrl(),t;n.match(/\/$/)&&(n=n.substring(0,n.length-1)),t=n+"/XRMServices/2011/OrganizationData.svc"+u,$.ajax({type:"GET",contentType:"application/json; charset=utf-8",datatype:"json",url:t,beforeSend:function(n){n.setRequestHeader("Accept","application/json")},success:function(n){var u=n.d.results,f,e;if($.fx.speeds._default=1e3,$(document).ready(function(){$("#dialog").dialog({autoOpen:!1,show:"blind",hide:"explode",modal:!0})}),u.length>0){for(i=0;i

We have compressed the code from:
Original Size: 1953 bytes; reduced size: 1085 bytes (44.4% minification)

The tool also provides an approximate Gzip compression:

Gzip of output approximately 887 bytes (18.2% compression)

This tool can help reduce the code footprint on customizations with large usage of javascript and css files, and is a great way to tackle latency and keep the code running at optimal performance.

Hope this was useful.


  1. Why would you prefer it over Google Closure? https://closure-compiler.appspot.com/home

    1. I prefer Ajax minifier tool because it contains more options and you can use the DLL's in your own solution. Closure-compiler is useful for a quick job, you can't create a batch file and compress 100 files in one folder and get them all renamed, with ajax minifier tool you can.