Customizing of Jux News Wall

<?php if($params->get('filter-gray') == "1") : ?>
<script>
    !function($){
        // Fix on iOS
        var user_agent = navigator.userAgent.toLowerCase(); // detect the user agent
        var ios_devices = user_agent.match(/(iphone|ipod|ipad)/) ? true : false;
        // console.log(ios_devices);

        /*
        * Hover Gray
        */
        if(ios_devices != true){
            $("#news-itemList-<?php echo $module->id; ?> .wall-item").mouseenter(
                function () {
                    $('.wall-item').addClass('filter-gray');
                    $(this).removeClass('filter-gray');
                }
            );

            // Leave hover items
            $('#news-itemList-<?php echo $module->id; ?>').mouseleave(
                function () {
                    $('.wall-item').removeClass('filter-gray');
                }
            );
        }
        
    }(jQuery);
</script>
<?php endif; ?>

filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter ….3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\'/></filter></svg>#grayscale");