https://www.studypool.com/assets/fadee2fc/js/jquery-ias.min.js

1(function(b){b.ias=function(m){function e(){b(c.pagination).hide();c.scrollContainer.scroll(a)}function a(){var b,g;b=r.getCurrentScrollOffset(c.scrollContainer);g=k();b>=g&&(u()>=c.triggerPageTreshold?(d(),v(function(){f(b)})):f(b))}function d(){c.scrollContainer.unbind("scroll",a)}function k(a){var g;g=b(c.container).find(c.item).last();if(0===g.size())return 0;g=g.offset().top+g.height();a||(g+=c.tresholdMargin);return g}function f(a,g){var f;f=b(c.next).attr("href");if(!f)return c.noneleft&&b(c.container).find(c.item).last().after(c.noneleft),
2d();c.beforePageChange&&b.isFunction(c.beforePageChange)&&!1===c.beforePageChange(a,f)||(q.pushPages(a,f),d(),w(),l(f,function(a,n){var k;!1!==c.onLoadItems.call(this,n)&&(b(n).hide(),k=b(c.container).find(c.item).last(),k.after(n),b(n).fadeIn());f=b(c.next,a).attr("href");b(c.pagination).replaceWith(b(c.pagination,a));s().remove();b(c.pagination).hide();f?e():d();c.onRenderComplete.call(this,n);g&&g.call(this)}))}function l(a,g,d){var f=[],e,k=Date.now(),h,l;d=d||c.loaderDelay;b.get(a,null,function(a){e=
3b(c.container,a).eq(0);0===e.length&&(e=b(a).filter(c.container).eq(0));e&&e.find(c.item).each(function(){f.push(this)});g&&(l=this,h=Date.now()-k,h<d?setTimeout(function(){g.call(l,a,f)},d-h):g.call(l,a,f))},"html")}function h(a){var c=k(!0);0<c&&f(c,function(){d();q.getCurPageNum(c)+1<a?(h(a),b("html,body").animate({scrollTop:c},400,"swing")):(b("html,body").animate({scrollTop:c},1E3,"swing"),e())})}function u(){var a=r.getCurrentScrollOffset(c.scrollContainer);return q.getCurPageNum(a)}function s(){var a=
4b(".ias_loader");0===a.size()&&(a=b('<div class="ias_loader">'+c.loader+"</div>"),a.hide());return a}function w(){var a=s(),d;!1!==c.customLoaderProc?c.customLoaderProc(a):(d=b(c.container).find(c.item).last(),d.after(a),a.fadeIn())}function t(a){var d=b(".ias_trigger");0===d.size()&&(d=b('<div class="ias_trigger"><a href="#">'+c.trigger+"</a></div>"),d.hide());b("a",d).off("click").on("click",function(){t().remove();a.call();return!1});return d}function v(a){a=t(a);b(c.container).find(c.item).last().after(a);
5a.fadeIn()}var c=b.extend({},b.ias.defaults,m),r=new b.ias.util,q=new b.ias.paging(c.scrollContainer),p=c.history?new b.ias.history:!1,x=this;(function(){var a;q.onChangePage(function(a,b,d){p&&p.setPage(a,d);c.onPageChange.call(this,a,d,b)});e();p&&p.havePage()&&(d(),a=p.getPage(),r.forceScrollTop(function(){var c;1<a?(h(a),c=k(!0),b("html, body").scrollTop(c)):e()}));return x})()};b.ias.defaults={container:"#container",scrollContainer:b(window),item:".item",pagination:"#pagination",next:".next",
6noneleft:!1,loader:'<img src="images/loader.gif"/>',loaderDelay:600,triggerPageTreshold:3,trigger:"Load more items",tresholdMargin:0,history:!1,onPageChange:function(){},beforePageChange:function(){},onLoadItems:function(){},onRenderComplete:function(){},customLoaderProc:!1};b.ias.util=function(){var m=!1,e=!1,a=this;(function(){b(window).load(function(){m=!0})})();this.forceScrollTop=function(d){b("html,body").scrollTop(0);e||(m?(d.call(),e=!0):setTimeout(function(){a.forceScrollTop(d)},1))};this.getCurrentScrollOffset=
7function(a){var b;b=a.get(0)===window?a.scrollTop():a.offset().top;a=a.height();return b+a}};b.ias.paging=function(){function m(a){for(var b=e.length-1;0<b;b--)if(a>e[b][0])return b+1;return 1}var e=[[0,document.location.toString()]],a=function(){},d=1,k=new b.ias.util;b(window).scroll(function(){var f,l,h;f=k.getCurrentScrollOffset(b(window));l=m(f);a:{for(h=e.length-1;0<=h;h--)if(f>e[h][0]){h=e[h];break a}h=null}d!==l&&(f=h[0],h=h[1],a.call({},l,f,h));d=l});this.getCurPageNum=function(a){a=a||k.getCurrentScrollOffset(b(window));
8return m(a)};this.onChangePage=function(b){a=b};this.pushPages=function(a,b){e.push([a,b])}};b.ias.history=function(){var b=!1,e=!1,e=!!(window.history&&history.pushState&&history.replaceState),e=!1;this.setPage=function(a,b){this.updateState({page:a},"",b)};this.havePage=function(){return!1!==this.getState()};this.getPage=function(){var a;return this.havePage()?(a=this.getState(),a.page):1};this.getState=function(){var a;if(e){if((a=history.state)&&a.ias)return a.ias}else if(a="/page/"===window.location.hash.substring(0,
96))return a=parseInt(window.location.hash.replace("/page/",""),10),{page:a};return!1};this.updateState=function(a,d,e){b?this.replaceState(a,d,e):this.pushState(a,d,e)};this.pushState=function(a,d,k){e?history.pushState({ias:a},d,k):(a=0<a.page?"/page/"+a.page:"",window.location.hash=a);b=!0};this.replaceState=function(a,b,k){e?history.replaceState({ias:a},b,k):this.pushState(a,b,k)}}})(jQuery);