window onload event for page first load code example

Example 1: document.addEventListener("load", function () {

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

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

Example 2: window onload

function load(argument) {
	// body...
}
window.onload = load;