Answers for "how to call a function when the page is loaded js"

js on page loaded

window.onload = function() {
  yourFunction(param1, param2);
};

javascript - How to execute a function when page has fully loaded?

That's called load. It came waaaaay before DOM ready was around, and DOM ready was actually created for the exact reason that load waited on images.

window.addEventListener('load', function () {   alert("It's loaded!") })