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LibWeb/HTML: Default ErrorEvent error to undefined

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This was a change in the HTML spec, see:

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Shannon Booth 2025-01-05 20:21:22 +13:00 • committed by Andreas Kling
commit 8214371ad5
Notes: github-actions[bot] 2025-01-05 12:37:18 +00:00
4 changed files with 73 additions and 2 deletions
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60
Tests/LibWeb/Text/input/wpt-import/html/webappapis/scripting/events/event-handler-processing-algorithm-error/document-synthetic-errorevent.html Normal file
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<!DOCTYPE html>
<meta charset="utf-8">
<title>Event handlers processing algorithm: error events</title>
<script src="../../../../../resources/testharness.js"></script>
<script src="../../../../../resources/testharnessreport.js"></script>
<link rel="help" href="https://html.spec.whatwg.org/multipage/#the-event-handler-processing-algorithm">
<link rel="author" title="Domenic Denicola" href="mailto:d@domenic.me">
<div id="log"></div>
<script>
"use strict";
setup({ allow_uncaught_exception: true });
promise_test(t => {
document.onerror = t.step_func((...args) => {
assert_equals(args.length, 1);
return true;
});
const eventWatcher = new EventWatcher(t, document, "error");
const promise = eventWatcher.wait_for("error").then(e => {
assert_equals(e.defaultPrevented, false);
assert_equals(e.message, "");
assert_equals(e.filename, "");
assert_equals(e.lineno, 0);
assert_equals(e.colno, 0);
assert_equals(e.error, undefined);
});
document.dispatchEvent(new ErrorEvent("error", { cancelable: true }));
return promise;
}, "error event is normal (return true does not cancel; one arg) on Document, with a synthetic ErrorEvent");
test(() => {
const e = new ErrorEvent("error");
assert_equals(e.message, "");
assert_equals(e.filename, "");
assert_equals(e.lineno, 0);
assert_equals(e.colno, 0);
assert_equals(e.error, undefined);
}, "Initial values of ErrorEvent members")
test(() => {
const e = new ErrorEvent("error", {error : null});
assert_equals(e.error, null);
}, "error member can be set to null")
test(() => {
const e = new ErrorEvent("error", {error : undefined});
assert_equals(e.error, undefined);
}, "error member can be set to undefined")
test(() => {
const e = new ErrorEvent("error", {error : "foo"});
assert_equals(e.error, "foo");
}, "error member can be set to arbitrary")
</script>