<!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>

<!-- The onclick submit() should *not* get superseded in this case by the
     default action submit(), because onclick here calls preventDefault().
  -->




<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="frame2" action="nonexistent.html">
  <input type=hidden name=navigated value=1>
  <input id=submitbutton type=submit>
</form>

<script>
let frame1 = document.getElementById('frame1');
let frame2 = document.getElementById('frame2');
let form1 = document.getElementById('form1');
let submitbutton = document.getElementById('submitbutton');

async_test(t => {
  window.addEventListener('load', () => {
    frame1.addEventListener('load', t.step_func_done(() => {
      assert_unreached("Frame1 should not get navigated by this test.");
    }));
    frame2.addEventListener('load', t.step_func_done(() => {
      let params = (new URL(frame2.contentWindow.location)).searchParams;
      let wasNavigated = !!params.get("navigated");
      assert_true(wasNavigated);
    }));
    form1.addEventListener('click', t.step_func(() => {
      form1.submit();
      form1.target='frame1';
      event.preventDefault();  // Prevent default here
    }));
    submitbutton.click();
  });
}, 'preventDefault should allow onclick submit() to succeed');
</script>
