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<!doctype html>
<meta charset="utf-8">
<title>Change event when clearing a textarea</title>
<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
<link rel="author" href="https://mozilla.org" title="Mozilla">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1881457">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<textarea>abc</textarea>
<script>
promise_test(async function() {
let textarea = document.querySelector("textarea");
let changeFired = false;
textarea.addEventListener("change", () => {
changeFired = true;
}, { once: true });
textarea.focus();
assert_equals(document.activeElement, textarea, "Should focus textarea");
assert_false(changeFired, "Shouldn't have fired change event after focus");
textarea.select();
const kBackspaceKey = "\uE003";
await test_driver.send_keys(textarea, kBackspaceKey)
assert_false(changeFired, "Shouldn't have fired change event after select");
textarea.blur();
assert_true(changeFired, "Should've have fired change event after blur");
assert_equals(textarea.value, "", "Should've have cleared the value");
});
</script>
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