Answers for "html add event listener before document load"

listerner content loaded js

window.addEventListener('DOMContentLoaded', (event) => {
    console.log('DOM fully loaded and parsed');
});

document.addEventListener("load", function () {

window.addEventListener('load', (event) => {
  console.log('page is fully loaded');
});

window.onload = (event) => {
  console.log('page is fully loaded');
};