function stikySocialLInks() {

        if ( $('.social-container').length ) {

            var currentScrollTop =  $(window).scrollTop(),
                viewportHeight = $(window).height(),
                article = $('.article'),
                articleOffsetTop = article.offset().top,
                socialContainer = $('.social-container'),
                articleEnd = articleOffsetTop + article.outerHeight() - socialContainer.outerHeight();


            var socialLinksHeight = $('.social-container .social-links').outerHeight(),
                socialLinksOffsetTopBase = $('.article').offset().top + parseInt(socialContainer.css('padding-top'));


            if ( currentScrollTop > viewportHeight / 2 - socialLinksHeight - 80 ) {

                socialContainer.addClass('social-container__stiky');

            }

            if ( currentScrollTop > articleEnd ) {

                socialContainer.removeClass('social-container__stiky').addClass('social-container__bottom');

            } else if ( currentScrollTop > articleOffsetTop ) {

                socialContainer.addClass('social-container__stiky').removeClass('social-container__bottom');

            } else {

                socialContainer.removeClass('social-container__stiky social-container__bottom');

            }
        }

    }

    stikySocialLInks();

    $(window).on('scroll', function() {

        stikySocialLInks();

    });