Royalslider - Property 'ev' is undefined on 'slider.ev.on'

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Per discussion: <a href="https://stackoverflow.com/questions...7304514?noredirect=1#comment25096851_17304514">On active slide, append input</a>

I'm still not figuring this out though, but I feel so close. I'm just stumped. The code looks right..but I'm still getting errors. Specifically with "slider.ev.on" - Uncaught TypeError: Cannot read property 'ev' of undefined

Here's my code.

   jQuery(document).ready(function($) { 

        var sliderEL = $('.new-royalslider-1'); 
        var slider = sliderEL.data('royalSlider');

        var addSearch = function() {

            if($('.rsActiveSlide .rsABlock').hasClass("dog-shelter-input")){
                $(".feature-search #name_or_keywords").val('');
             }else {
               $('.feature-search #name_or_keywords').val('Dog Shelter');
            }

             if($('.rsActiveSlide .rsABlock').hasClass("scholar-input")){
                $(".feature-search .#name_or_keywords").val('');
            }else {
               $('.feature-search #name_or_keywords').val('Scholarships');
            }
        };

        slider.ev.on('rsAfterSlideChange', addSearch);

        addSearch();

   });

some relevant topics were:

<a href="http://help.dimsemenov.com/discussi...-wordpress-version-to-change-image-scale-mode" rel="nofollow noreferrer">http://help.dimsemenov.com/discussi...-wordpress-version-to-change-image-scale-mode</a>

<a href="http://help.dimsemenov.com/discussi...ng-slider-index-to-wordpress-gives-a-js-error" rel="nofollow noreferrer">http://help.dimsemenov.com/discussi...ng-slider-index-to-wordpress-gives-a-js-error</a>