How to cause a form to be submitted automatically on page load in JavaScript?

Question

This may have an obvious answer, but I am very new to js so I have no idea how to do this. I would like a form on a page to be submitted automatically when that page is loaded without requiring any user action like pressing a button. How to do this?

Answer 1

<form id=lol action="file.php"></form>
<script>document.getElementById('lol').submit();</script>