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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 => {
window.onerror = t.step_func((...args) => {
assert_greater_than(args.length, 1);
return true;
});
const eventWatcher = new EventWatcher(t, window, "error");
const promise = eventWatcher.wait_for("error").then(e => {
assert_equals(e.defaultPrevented, true);
});
window.dispatchEvent(new ErrorEvent("error", { cancelable: true }));
return promise;
}, "error event is weird (return true cancels; many args) on Window, with a synthetic ErrorEvent");
promise_test(t => {
const theError = { the: "error object" };
window.onerror = t.step_func(function (message, filename, lineno, colno, error) {
assert_equals(arguments.length, 5, "There must be exactly 5 arguments");
assert_equals(message, "message");
assert_equals(filename, "filename");
assert_equals(lineno, 1);
assert_equals(colno, 2);
assert_equals(error, theError);
return true;
});
const eventWatcher = new EventWatcher(t, window, "error");
const promise = eventWatcher.wait_for("error");
window.dispatchEvent(new ErrorEvent("error", {
message: "message",
filename: "filename",
lineno: 1,
colno: 2,
error: theError
}));
return promise;
}, "error event has the right 5 args on Window, with a synthetic ErrorEvent");
</script>
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