Extend marketing forms using code

A marketing form defines a set of input fields arranged into a form layout. You'll probably build a small library of reusable forms that you can place on all your various marketing pages as needed. To add a marketing form to a specific marketing page, use a form element to position the form, and choose local settings for it, which applies to that page only. More information Marketing forms

Marketing forms can be extended using JavaScript to perform custom business actions in the Dynamics 365 Marketing. Following are the methods that are available to extend marketing forms.

JavaScript API

We're consuming the latest version of the JavaScript API. Make sure that your references to form-loader.js or loader.js script look like https://mktdplp102cdn.azureedge.net/public/latest/js/form-loader.js?v=[version tag] or https://mktdplp102cdn.azureedge.net/public/latest/js/loader.js?v=[version tag], respectively. The ?v=[version tag] section can be omitted. Older scripts (scripts that look like https://mktdplp102cdn.azureedge.net/public/static/[version tag]/js/form-loader.js or https://mktdplp102cdn.azureedge.net/public/static/[version tag]/js/loader.js) are obsolete and no longer supported.

Place the custom code right after the form-loader.js script.

Code sample:

<script src="https://mktdplp102cdn.azureedge.net/public/latest/js/form-loader.js?v=..."></script>
// correct - the script will attach event handlers right after form loader script
MsCrmMkt.MsCrmFormLoader.on("afterFormLoad", function() {});

// wrong - the script will attach event handlers after window has finished loading, form already might have been loaded in the meantime and no events will trigger anymore
// window.onload = function() { MsCrmMkt.MsCrmFormLoader.on("afterFormLoad", function() {}); };

MsCrmMkt.MsCrmFormLoader methods

Function Name Description Parameter name Parameter type Parameter Description Returns
.on(eventType,callback) Registers a callback to a type of form lifecycle event eventType string, one of "afterFormLoad", "afterFormRender", "afterFormSubmit", "formLoad", "formRender", "formSubmit" Event type to hook to undefined
callback Callback function Function
.off(eventType) Unregister a callback(s) of given form lifecycle event eventType optional string, one of "afterFormLoad", "afterFormRender", "afterFormSubmit", "formLoad", "formRender", "formSubmit" Event type to hook to undefined
.sendFormCaptureToCrm(form) Send a form submission to Dynamics 365 Marketing, supported only for form capturing scenario form DOM element representing the form or JQuery selector representing the form Form DOM element Promise<string>

Form events

Event Name Triggered for captured forms Syntax Description
formLoad Yes MsCrmMkt.MsCrmFormLoader
.on("formLoad", function(event) {})
Triggers when the form placeholder is recognized before the actual form content is fetched, for captured forms triggers when form is recognized
formRender No MsCrmMkt.MsCrmFormLoader
.on("formRender", function(event) {})
Triggers after the form content is fetched and before the form content is injected to a page.
afterFormRender No MsCrmMkt.MsCrmFormLoader
.on("afterFormRender", function(event) {})
Triggers after the form content is injected to a page before the validation hooks are attached.
afterFormLoad No MsCrmMkt.MsCrmFormLoader
.on("afterFormLoad", function(event) {})
Triggers after the form content is injected to a page and after the validation hooks are attached.
formSubmit No MsCrmMkt.MsCrmFormLoader
.on("formSubmit", function(event) {})
Triggers on form submit before the form submission is sent to the server.
afterFormSubmit Yes MsCrmMkt.MsCrmFormLoader
.on("afterFormSubmit", function(event) {})
Triggers on form submit after the form submission is sent to the server. It triggers only when the submission is successful. It triggers before the redirect or showing the confirmation message.

For each event callback following methods are available:

Method Name Description Return type
.getType() Gets the event type string, one of "afterFormLoad", "afterFormRender", "afterFormSubmit", "formLoad", "formRender", "formSubmit"
.getFormPageId() Gets the form page ID - this relates to msdyncrm_formpage entity unique identifier string
.getFormPlaceholder() Gets the DOM element representing the form DOM element
.preventDefault() Cancels the form submission, valid only for event of formSubmit type undefined
.preventFormLoadingProgressBar() Hides the spinner while the form is loading, valid only for event formLoad type undefined
.setFormNotification(function (n) {}) Overrides a callback for rendering form notification (like a form submission message). Without a function body, no notifications will be rendered. Valid only for an event of formLoad type. undefined

Form capturing behavior customization

The form capturing is directed by the configuration element that looks like <div class="d365-mkt-config" style="display:none" data-website-id="..." data-hostname="...">. You can change the behavior of the form capturing by adding the following attributes:

Attribute name Description
data-ignore-prevent-default="true" When specified, the form will be submitted regardless of the fact that .preventDefault() was invoked on the event.
data-no-submit="true" When specified, the form capturing script won't capture the form submit event, you should trigger the MsCrmMkt.MsCrmFormLoader.sendFormCaptureToCrm(form) explicitly. This is useful for cases when you want to do your form submission first and sync to Dynamics 365 Marketing later.


The Javascript API is available only for forms hosted as a script, it is not supported for the iframe hosting option.

Add your code snippet while using Portals

To add the JavaScript code, you need to follow the steps below:

  1. Navigate to Marketing app and go to Marketing pages.

  2. Choose New to create a new marketing page.

  3. Drag and drop Form element from the Toolbox tab into the Designer tab and select the marketing form you want to use.

    Add new form page.

  4. Switch to HTML tab and your code snippet.

    Add code in HTML tab.

  5. Select Save to save your changes and then select Go live.

Add your code snippet when you're using your own CMS and form hosting

To add the code snippet, you need to follow the steps below:

  1. Navigate to the Marketing app and go to Marketing forms

  2. Choose New to create a new marketing form.

  3. Select Go live.

  4. Select the Form hosting tab and under the Available domains for form hosting, select the domain if it is available, or select + Create new domain.

    Form Hosting Tab.

  5. Add your own CMS domain and select Save.

  6. In the From hosting tab, under the Related marketing form pages tab, select ... and + New Form Page to add a marketing form page.

    Related Marketing Form Pages.

  7. Select Save.

  8. Now select the form page you have created and copy the script to the clipboard.

    Add code snippet.

  9. Now in your CMS, edit the page where you want to include the form, add your customizations and script.

    Ad customizations to CMS.


  1. Sample validation - checks if the textbox is either Fabricam or Contoso, otherwise prevents the form submission.

    MsCrmMkt.MsCrmFormLoader.on('formSubmit', function(event) {
      // sample validation - check if 
      document.getElementById('txt-company-name-message').style.visibility = 'hidden';
      var companyName = document.getElementById('txt-company-name').value;
      if (companyName !== 'Fabricam' && companyName != 'Contoso') 
        document.getElementById('txt-company-name-message').style.visibility = 'visible';
  2. Filling the incoming query string parameters to hidden fields.

    MsCrmMkt.MsCrmFormLoader.on('afterFormLoad', function(event) {
      var self = window.location.toString();
      var queryString = self.split("?");
      var hiddenFields = document.querySelectorAll("input[type=hidden]");
      if (queryString.length > 1) 
        var pairs = queryString[1].split("&");
        for (var pairIndex in pairs) 
          var pair = pairs[pairIndex].split("=");
          if (pair.length !== 2) 
          var key = pair[0];
          var value = pair[1];
          if (key && value) 
            for (var i = 0; i < hiddenFields.length; i++) 
              if (hiddenFields[i].id === key) 
                hiddenFields[i].value = value;
  3. Localize the form (picklist) - You can use client-side extensibility to localize marketing forms. Localization must occur after the form is loaded (afterFormLoad event). Inside the marketing page (or in the CMS where you host the form), add the following localization script:

    function translatePicklists(lcid) 
        var picklists = document.querySelectorAll("select");
        for(var i = 0; i < picklists.length; i++) 
            var picklist = picklists[i];
            var relatedDatalist = document.getElementById("localize-" + picklist.name + "-" + lcid.toString());
            if (relatedDatalist) 
                for(var j = 0; j < picklist.options.length; j++) 
                    if (j >= relatedDatalist.options.length) 
                    picklist.options[j].text = relatedDatalist.options[j].text;
    MsCrmMkt.MsCrmFormLoader.on("afterFormLoad", function(event) { translatePicklists(1029); });

    In the marketing form, make sure that you have prepared the translations. Edit the marketing form in the HTML designer, format it (right-click in the designer, then choose format), and add the necessary translations.

    <div data-editorblocktype="Field-dropdown">
        <div class="marketing-field">
            <div class="lp-form-field" data-required-field="false">
                <label for="f7ae1a98-0d83-4592-afe0-272c85ce607d" class="lp-ellipsis" title="">Marital status</label>
                <select id="f7ae1a98-0d83-4592-afe0-272c85ce607d" name="f7ae1a98-0d83-4592-afe0-272c85ce607d" class="lp-form-fieldInput" title="" style="width: 100%; box-sizing: border-box;">
                  <option value=""></option>
                  <option value="1">Single</option>
                  <option value="2">Married</option>
                  <option value="3">Divorced</option>
                  <option value="4">Widowed</option>
    <!-- format is localize-fieldid-lcid -->
    <datalist id="localize-f7ae1a98-0d83-4592-afe0-272c85ce607d-1029">