Inyección de ads en infinite scroll

infinite_scroll.js

(document.querySelector(".text-editor") || {}).className += ' ndg_inject';

document.addEventListener('ndg:infinitescroll', function(e){
    (document.querySelectorAll(".text-editor") || []).forEach(function(art){
        if(!art.className.includes("ndg_inject") && art.hasChildNodes()){
            var eachChild = art.firstChild;
            var cont = true; 
            var counter = 1;
            while(cont){
                if(eachChild.nodeName === "P"){
                    if(counter % 3 === 0){
                        googletag.cmd.push(function() {
                            var slot = googletag.defineSlot('/57869717/NewDream/Box1', [300, 250])
                                .setTargeting('test', 'infinitescroll')
                                .addService(googletag.pubads());
                            var adUnit = document.createElement('div');
                            adUnit.id = slot.getSlotElementId();
                            adUnit.setAttribute('style','width:300px;height:250px;overflow:hidden;');
                            eachChild.parentNode.insertBefore(adUnit, eachChild.nextElementSibling);
                            googletag.display(slot);
                            googletag.pubads().refresh([slot]);
                        });
                    }
                   counter++;
                }
                if(!!eachChild.nextElementSibling){
                    eachChild = eachChild.nextElementSibling;
                }else{
                    cont=false;
                }
            }
            art.className += " ndg_inject";
        }
    });
});