var delighters=new(function(){var self=this,dels=this.dels=[],options={attribute:'data-delighter',classnames:['delighter','started','ended'],start:0.75,end:0.75,autoinit:true};document.addeventlistener("domcontentloaded",function(){if(options.autoinit)init();});function config(opts){for(var name in opts)options[name]=opts[name];}
function init(){document.addeventlistener('scroll',scroll)
var els=document.queryselectorall('['+options.attribute+']');for(var i=0;i<els.length;i++){var el=els[i],def=el.getattribute(options.attribute,2),pairs=def.split(';'),del={};del.start=options.start;del.end=options.end;for(var j=0;j<pairs.length;j++){var pair=pairs[j].split(':'),name=pair[0],val=isnan(pair[1]*1)?pair[1]:pair[1]*1;if(name)del[name]=(val===undefined)?true:val;}
del.el=el;del.id=dels.length;dels.push(del);el.classlist.add(options.classnames[0])
if(del.debug)el.style.outline='solid red 4px';}
scroll();}
function scroll(){var viewportheight=window.innerheight;for(var i=0;i<dels.length;i++){var del=dels[i],box=del.el.getboundingclientrect(),factorstart=box.top/viewportheight,factorend=box.bottom/viewportheight;if(del.debug){if(factorstart>=0&&factorstart<=1){if(!del.startline){del.startline=document.createelement('div')
document.body.appendchild(del.startline);del.startline.style='position:fixed;height:0;width:100%;border-bottom:dotted red 2px;top:'+(del.start*100)+'vh';}}
if(((factorend<del.end)||(factorstart>1))&&del.startline){del.startline.parentnode.removechild(del.startline);delete del.startline;}}
if(factorstart<del.start&&!del.started){del.started=true;del.el.classlist.add(options.classnames[1])}
else if(factorstart>del.start&&del.started){del.started=false;del.el.classlist.remove(options.classnames[1])}
if(factorend<del.end&&!del.ended){del.ended=true;del.el.classlist.add(options.classnames[2])}
else if(factorend>del.end&&del.ended){del.ended=false;del.el.classlist.remove(options.classnames[2])}}}
self.init=init;self.config=config;})();