form-double-submit-to-different-origin-frame.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/forms/form-submission-0/form-double-submit-to-different-origin-frame.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<link rel="author" href="mailto:masonf@chromium.org">

<link rel="help" href="https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#form-submission-algorithm">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/common/get-host-info.sub.js"></script>

<!-- The onclick submit() should get superseded by the default

     action submit(), which isn't preventDefaulted by onclick here.

     This is per the Form Submission Algorithm [1], step 22.3, which

     says that new planned navigations replace old planned navigations.

    [1] https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#form-submission-algorithm

-->

<label for=frame1 style="display:block">This frame should stay blank</label>

<iframe name=frame1 id=frame1></iframe>

<label for=frame2 style="display:block">This frame should navigate (to 404)</label>

<iframe name=frame2 id=frame2></iframe>

<form id="form1" target="frame1" action="nonexistent.html">

  <input type=hidden name=navigated value=1>

  <input id=submitbutton type=submit>

</form>

<script>

promise_test(async () => {

  function getLoadPromise(frame) {

    return new Promise(resolve => {

      frame.addEventListener('load', resolve);

});

  const frame1 = document.getElementById('frame1');

  const frame2 = document.getElementById('frame2');

  await getLoadPromise(window);

  const frame1LoadPromise = getLoadPromise(frame1);

  let frame2LoadPromise = getLoadPromise(frame2);

  const subframeUrl = get_host_info().REMOTE_ORIGIN;

  frame1.src = subframeUrl;

  frame2.src = subframeUrl;

  await frame1LoadPromise;

  await frame2LoadPromise;

  assert_false(!!frame1.contentDocument, 'frame1 should have a different origin.');

  assert_false(!!frame2.contentDocument, 'frame2 should have a different origin.');

  window.frame1Navigated = false;

  frame1.addEventListener('load', () => {

    window.frame1Navigated = true;

});

  frame2LoadPromise = getLoadPromise(frame2);

  form1.addEventListener('click', () => {

    form1.submit();

    form1.target = 'frame2';

});

  submitbutton.click();

  await frame2LoadPromise;

  assert_false(window.frame1Navigated, 'frame1 should not be navigated by the form submission.');

}, 'default submit action should supersede onclick submit() for cross-origin iframes');

</script>