function scrollCheckIfFadeIn(el, num){
return ()=>{ if (el.getBoundingClientRect().top > window.innerHeight) return; if (el.classList.contains("animation__fadein_visible")) return; el.classList.add("animation__fadein_visible"); el.classList.add(("animation__fadein_visible" + num)); };
}
function scrollFadeIn(arrayOfElementIds, count = false){
let num = 1; arrayOfElementIds.forEach(el => { if (Array.isArray(el)){ scrollFadeIn(el, true); return; } el.classList.add("animation__fadein_hidden"); window.addEventListener("scroll", scrollCheckIfFadeIn(el, num)); if (count) num++; if (num > 9) num = 1; });
}