<!DOCTYPE html>
<meta charset="utf-8">
<link rel="help" href="https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#form-submission-2">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<iframe name="frame" id="frame"></iframe>
<form id="form" target="frame" action="does_not_exist.html">
  <input id="input" name="name" value="foo">
  <button id="submitbutton" type="submit">Submit</button>
</form>

<script>
async_test(t => {
  window.addEventListener('load', () => {
    const frame = document.getElementById('frame');
    frame.addEventListener('load', t.step_func_done(() => {
      const expected = (new URL("does_not_exist.html?name=bar", location.href)).href;
      assert_equals(frame.contentWindow.location.href, expected);
    }));

    const form = document.getElementById('form');
    const input = document.getElementById('input');
    const submitButton = document.getElementById('submitbutton');
    submitButton.addEventListener('click', event => {
      submitButton.remove();
      form.submit();
      input.value = "bar";
      form.submit();
      input.value = "baz";
    });

    submitButton.click();
  });
}, 'This test will pass if a form navigation successfully occurs when clicking a <button type=submit> element with a onclick event handler which removes the button and then calls form.submit().');
</script>
