Code to provide callbacks and override how NationBuilder processes signups through AJAX

nationbuilder-signup.js

$(formSelector).submit( function(event) {

    // Store the original NB function in a temp variable
    var tmp = window.NB.EventHub.dispatch;
    
    /**
     * $(this) / $form is the entire signup form. onsubmit changes can be made by finding inputs/children
     * 
     * ie. $form.find('input[type="submit"]').val('Loading');
     * 
     **/
    $form = $(this);
    
    // Override the NB function
    window.NB.EventHub.dispatch = function(e) {
        if (e == 'form.success') {
            // success
        } else {
      	    // error
        }
      
        // Restore the original NB function so things keep working
        window.NB.EventHub.dispatch = tmp;
    };
        
});