AJAX problem with sending a variable list to PHP

JavaScript
2

Nothing is immediately obvious to me, but I haven’t used raw XMLHttpRequest for a while, if you polyfil fetch and FormData you can write code like this instead.

fetch('process.php', {
  method: 'POST',
  body: new FormData(document.getElementById('my-form'))
});

If you inspect the request in the browser does it include the post data?