Is there a document.onload event?

Question

JavaScript

document.onload = function () {
console.log('do');
};
the result is null.
This event is not fired but only DOMContentLoaded is fired?
In the properties, why does the handler not work then?

Answer 1

stackoverflow.com/questions/588040/window-onload-v...
stackoverflow.com/questions/5135638/why-does-windo...

Answer 2

Maybe because the event has already fired when you are just going to catch it?