LayoutTests/fast/forms/form-data-associated-element-iteration.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <form id="form"></form>
 <div>This test passes if the web content process does not crash.</div>
 <script>
     if (window.testRunner)
         testRunner.dumpAsText();

     textAreaCount = 100;
     for (let i = 1; i <= textAreaCount; ++i) {
         let textarea = document.createElement("textarea");
         textarea.id = textarea.name = `textarea-${i}`;
         form.appendChild(textarea);
     }

     layoutCount = 1;
     frame = document.body.appendChild(document.createElement("iframe"));
     frame.contentWindow.matchMedia("(max-width: 100px)").addListener(listener);
     new FormData(form);

     function listener() {
         if (layoutCount == textAreaCount - 1) {
             for (let i = 0; i <= textAreaCount; ++i) {
                 let textarea = document.getElementById(`textarea-${i}`);
                 if (!textarea)
                     continue;

                 textarea.remove();
                 textarea = null;
             }
         }

         if (layoutCount <= textAreaCount) {
             frame.contentWindow.matchMedia(`(max-width: ${layoutCount + 1}px)`).addListener(listener);
             frame.width = layoutCount++;
         }
     }

     form.remove();
 </script>
 </html>
	<!DOCTYPE html>
	<html>
	<form id="form"></form>
	<div>This test passes if the web content process does not crash.</div>
	<script>
	if (window.testRunner)
	testRunner.dumpAsText();

	textAreaCount = 100;
	for (let i = 1; i <= textAreaCount; ++i) {
	let textarea = document.createElement("textarea");
	textarea.id = textarea.name = `textarea-${i}`;
	form.appendChild(textarea);
	}

	layoutCount = 1;
	frame = document.body.appendChild(document.createElement("iframe"));
	frame.contentWindow.matchMedia("(max-width: 100px)").addListener(listener);
	new FormData(form);

	function listener() {
	if (layoutCount == textAreaCount - 1) {
	for (let i = 0; i <= textAreaCount; ++i) {
	let textarea = document.getElementById(`textarea-${i}`);
	if (!textarea)
	continue;

	textarea.remove();
	textarea = null;
	}
	}

	if (layoutCount <= textAreaCount) {
	frame.contentWindow.matchMedia(`(max-width: ${layoutCount + 1}px)`).addListener(listener);
	frame.width = layoutCount++;
	}
	}

	form.remove();
	</script>
	</html>