https://www.llewellyn.com/blog/wp-content/themes/everly/js/pmc_infinity.js?ver=1

1;(function($){$.fn.infinitescroll=function(options,callback){function debug(){if(opts.debug){window.console&&console.log.call(console,arguments)}}
2function areSelectorsValid(opts){for(var key in opts){if(key.indexOf&&key.indexOf('Selector')>-1&&$(opts[key]).length===0){debug('Your '+ key+' found no elements.');return false;}
3return true;}}
4function determinePath(path){path.match(relurl)?path.match(relurl)[2]:path;if(path.match(/^(.*?)\b2\b(.*?$)/)){path=path.match(/^(.*?)\b2\b(.*?$)/).slice(1);}else
5if(path.match(/^(.*?)2(.*?$)/)){if(path.match(/^(.*?page=)2(\/.*|$)/)){path=path.match(/^(.*?page=)2(\/.*|$)/).slice(1);return path;}
6debug('Trying backup next selector parse technique. Treacherous waters here, matey.');path=path.match(/^(.*?)2(.*?$)/).slice(1);}else{if(path.match(/^(.*?page=)1(\/.*|$)/)){path=path.match(/^(.*?page=)1(\/.*|$)/).slice(1);return path;}
7debug('Sorry, we couldn\'t parse your Next (Previous Posts) URL. Verify your the css selector points to the correct A tag. If you still get this error: yell, scream, and kindly ask for help at infinite-scroll.com.');props.isInvalidPage=true;}
8return path;}
9function getDocumentHeight(){return opts.localMode?($(props.container)[0].scrollHeight&&$(props.container)[0].scrollHeight):$(document).height()}
10function isNearBottom(){var pixelsFromWindowBottomToBottom=0+
11getDocumentHeight()-(opts.localMode?$(props.container).scrollTop():($(props.container).scrollTop()||$(props.container.ownerDocument.body).scrollTop()))- $(opts.localMode?props.container:window).height();debug('math:',pixelsFromWindowBottomToBottom,props.pixelsFromNavToBottom);return(pixelsFromWindowBottomToBottom- opts.bufferPx<props.pixelsFromNavToBottom);}
12function showDoneMsg(){props.loadingMsg.find('img').hide().parent().find('div').html(opts.donetext).animate({opacity:1},2000).fadeOut('normal');opts.errorCallback();}
13function infscrSetup(){if(props.isDuringAjax||props.isInvalidPage||props.isDone)return;if(!isNearBottom(opts,props))return;$(document).trigger('retrieve.infscr');}
14function kickOffAjax(){props.isDuringAjax=true;props.loadingMsg.appendTo(opts.contentSelector).show();$(opts.navSelector).hide();props.currPage++;debug('heading into ajax',path);box=$(opts.contentSelector).is('table')?$('<tbody/>'):$('<div/>');frag=document.createDocumentFragment();box.load(path.join(props.currPage)+' '+ opts.itemSelector,null,loadCallback);}
15function loadCallback(){if(props.isDone){showDoneMsg();return false;}else{var children=box.children().get();if(children.length==0){return $.event.trigger("ajaxError",[{status:404}]);}
16while(box[0].firstChild){frag.appendChild(box[0].firstChild);}
17$(opts.contentSelector)[0].appendChild(frag);props.loadingMsg.fadeOut('normal');if(opts.animate){var scrollTo=$(window).scrollTop()+ $('#infscr-loading').height()+ opts.extraScrollPx+'px';$('html,body').animate({scrollTop:scrollTo},800,function(){props.isDuringAjax=false;});}
18callback.call($(opts.contentSelector)[0],children);if(!opts.animate)props.isDuringAjax=false;}}
19$.browser.ie6=$.browser.msie&&$.browser.version<7;var opts=$.extend({},$.infinitescroll.defaults,options),props=$.infinitescroll,box,frag;callback=callback||function(){};if(!areSelectorsValid(opts)){return false;}
20props.container=opts.localMode?this:document.documentElement;opts.contentSelector=opts.contentSelector||this;var relurl=/(.*?\/\/).*?(\/.*)/,path=$(opts.nextSelector).attr('href');if(!path){debug('Navigation selector not found');return;}
21path=determinePath(path);if(opts.localMode)$(props.container)[0].scrollTop=0;props.pixelsFromNavToBottom=getDocumentHeight()+
22(props.container==document.documentElement?0:$(props.container).offset().top)-
23$(opts.navSelector).offset().top;props.loadingMsg=$('<div id="infscr-loading" style="text-align: center;"><img alt="Loading..." src="'+
24opts.loadingImg+'" /><div>'+opts.loadingText+'</div></div>');(new Image()).src=opts.loadingImg;$(document).ajaxError(function(e,xhr,opt){debug('Page not found. Self-destructing...');if(xhr.status==404){showDoneMsg();props.isDone=true;$(opts.localMode?this:window).unbind('scroll.infscr');}});$(opts.localMode?this:window).bind('scroll.infscr',infscrSetup).trigger('scroll.infscr');$(document).bind('retrieve.infscr',kickOffAjax);return this;}
25$.infinitescroll={defaults:{debug:false,preload:false,nextSelector:"div.navigation a:first",loadingImg:"https://www.llewellyn.com/images/wordpress_loading.gif",loadingText:"<em>Loading the next set of posts...</em>",donetext:"<em>Congratulations, you've reached the end of the internet.</em>",navSelector:"div.navigation",contentSelector:null,extraScrollPx:150,itemSelector:"div.post",animate:false,localMode:false,bufferPx:40,errorCallback:function(){}},loadingImg:undefined,loadingMsg:undefined,container:undefined,currPage:1,currDOMChunk:null,isDuringAjax:false,isInvalidPage:false,isDone:false};})(jQuery);