<!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:[email protected]">
<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>
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