LoveIt/assets/js/lightGallery-init.js

$(document).ready(function () {
    let items = [];
    $('.post-content figure').each(function () {
        if ($(this).attr('class') == 'gallery-ignore') return true; // ignore any figures where class="pswp-ignore"
        // get properties from child a/img/figcaption elements,
        let $figure = $(this),
            $img = $figure.find('img'),
            $src = $img.attr('data-src'),
            $title = $figure.find('figcaption').html();

        if ($img.data('size')) {
            let $size = $a.data('size').split('x');
            var item = {
                'src': $src,
                'thumb': $src,
                'subHtml': $title,
                'width': $size[0],
                'height': $size[1]
            }
        } else {
            var item = {
                'src': $src,
                'thumb': $src,
                'subHtml': $title
            }
            var img = new Image();
            img.src = $src;
            var wait = setInterval(function () {
                var w = img.naturalWidth,
                    h = img.naturalHeight;
                if (w && h) {
                    clearInterval(wait);
                    item.width = w;
                    item.height = h;
                }
            }, 30);
        }

        var index = items.length;
        items.push(item);
        // console.log(item)

        $figure.on('click', function (event) {
            event.preventDefault();
            $(this).lightGallery({
                dynamic: true,
                download: false,
                showThumbByDefault: false,
                dynamicEl: items,
                index: index
            })
        });
    });
});