LayoutTests/fast/forms/submit-form-inside-formdata-event.html - WebKit - Git at Google

 <DOCTYPE html>
 <html>
 <body>
 <script src="../../resources/js-test.js"></script>
 <script>
 description("Tests submitting the form again from inside the formdata event.");
 jsTestIsAsync = true;

 onload = () => {
     let form = document.getElementById("testForm");
     let frame = document.getElementById("testFrame");
     frame.onload = () => {
         testPassed("The frame was navigated");
         finishJSTest();
     };
     counter = 0;
     form.addEventListener('formdata', e => {
         ++counter;
         form.submit();
     });
     form.submit();
     shouldBe("counter", "1");
     new FormData(form);
     shouldBe("counter", "2");
 }
 </script>
 <iframe id="testFrame" name="testFrame" style="display:none"></iframe>
 <form id="testForm" action="resources/test.txt" target="testFrame" style="display:none">
     <input name="foo" value="bar">
 <form>
 </body>
 </html>
	<DOCTYPE html>
	<html>
	<body>
	<script src="../../resources/js-test.js"></script>
	<script>
	description("Tests submitting the form again from inside the formdata event.");
	jsTestIsAsync = true;

	onload = () => {
	let form = document.getElementById("testForm");
	let frame = document.getElementById("testFrame");
	frame.onload = () => {
	testPassed("The frame was navigated");
	finishJSTest();
	};
	counter = 0;
	form.addEventListener('formdata', e => {
	++counter;
	form.submit();
	});
	form.submit();
	shouldBe("counter", "1");
	new FormData(form);
	shouldBe("counter", "2");
	}
	</script>
	<iframe id="testFrame" name="testFrame" style="display:none"></iframe>
	<form id="testForm" action="resources/test.txt" target="testFrame" style="display:none">
	<input name="foo" value="bar">
	<form>
	</body>
	</html>