form-double-submit.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.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>

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!-- The onclick submit() should get superseded by the default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

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='frame2';

    }));

    submitbutton.click();

});

}, 'default submit action should supersede onclick submit()');

</script>