AJAX load items for ACF gallery field

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Load items in js when loaded document, also load more items when scroll to the end of page.

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<?php $images = get_field('portfolio'); if( $images ): ?>
<div class="container-fluid">
<div class="row">
<!-- Save images to js variable -->
<script>var images = JSON.parse('<?= wp_json_encode( $images ) ?>'); </script>
<script>
                jQuery(function ($) {
                    var win = $(window);
                    
                    var countArray = images.length;
                    var count = 0;
                    <!-- Function of looping images -->
                    function loopImages() {
                        var index = 0;
                        for (count; count <= images.length; count++) {
                            
                            var list = "<a href='" + images[count].url + "' class='hidden-xs-up item portfolio-item " + ( images[count].width > images[count].height  ? 'col-md-6 col-12' : "col-md-3 col-12") +"'> <img class='lazy' src='" + images[count].url + "' alt='" + images[count].alt + "' /><span class='cont'>" + images[count].caption + "<br>" + ( images[count].description  ? '<span>Photographer: </span>' +  images[count].description + "</span>" : "") + "</a> ";
                            $('.content .container-fluid .row').append(list);
 
                            index++;
 
                            $('.overlay-s').removeClass('h');
                            fancybox_init();
 
                            setTimeout(function() {
                                $('.overlay-s').addClass('h');
                                $('.portfolio-item').removeClass('hidden-xs-up');
                            }, 3000);
                            
                            if (index%9 == 0) {
                                count++;
                                
                                return;
                            }
                        }
                    }
                    
                    loopImages();
                    $('.overlay-s').addClass('h');
                    $('.portfolio-item').removeClass('hidden-xs-up');
                    $('.page-template-page-portfolio .content').addClass('bind');
                    // Each time the user scrolls
                    win.scroll(function() {
                        // End of the document reached?
                        if ($(document).height() - win.height() == win.scrollTop()) {
                            
                            loopImages();
 
                            
                        }
                    });
                    
                });
                function fancybox_init(){
                        $("a[href*='.jpg'], a[href*='.png']").attr('rel', 'fancybox').fancybox({
                            maxWidth  : 800,
                            maxHeight : 600,
                            fitToView : true,
                            width     : '70%',
                            height    : '70%',
                            autoSize  : true,
                            closeClick    : false,
                            openEffect    : 'none',
                            closeEffect   : 'none'
                        });
                    }
 
                </script></div>
</div>
<div class="overlay-s h"></div>
<?php endif; ?>

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