hexo-theme-icarus/source/js/main.js

(function($){
    $('.article img:not(".not-gallery-item")').each(function () {
        // wrap images with link and add caption if possible
        if ($(this).parent('a').length === 0) {
            $(this).wrap('<a class="gallery-item" href="' + $(this).attr('src') + '"></a>');
            if (this.alt) {
                $(this).after('<div class="has-text-centered is-size-6 has-text-grey caption">' + this.alt + '</div>');
            }
        }
    });

    if (typeof(moment) === 'function') {
        $('.article-meta time').each(function () {
            $(this).text(moment($(this).attr('datetime')).fromNow());
        });
    }
})(jQuery);