vanilla js scroll library
npm i fukasa
fukasa.on(0.5, function() {
var dom = document.createElement("div");
dom.id = "dom05";
document.body.appendChild(dom);
});
var domtarget = document.getElementById("domtarget");
fukasa.on(domtarget, function() {
domtarget.innerHTML = "domtarget OK";
});