Nexus,
window.addEventListener = function(){
let progress = document.querySelector(".progress");
let scrollTop = window.pageYOffset;
let heightBody = document.querySelector("body").scrollHeight;
heightBody = heightBody / 100;
heightBody = Math.round(heightBody);
progress.style.width = scrollTop + "px";
console.log(heightBody);
}
сделал addEventListener и почему то не работает