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WebKit export of https://bugs.webkit.org/show_bug.cgi?id=233834 #31893

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Dec 4, 2021
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WebKit export of https://bugs.webkit.org/show_bug.cgi?id=233834 #31893

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26 changes: 26 additions & 0 deletions dom/events/event-global.html
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,8 @@
<script src="/resources/testharnessreport.js"></script>
<div id=log></div>
<script>
setup({allow_uncaught_exception: true});

test(t => {
assert_own_property(window, "event");
assert_equals(window.event, undefined);
Expand Down Expand Up @@ -62,6 +64,30 @@
shadowNode.dispatchEvent(new Event("test", {composed: true, bubbles: true}));
}, "window.event is undefined if the target is in a shadow tree (event dispatched inside shadow tree)");

async_test(t => {
let parent = document.createElement("div");
let root = parent.attachShadow({mode: "open"});
document.body.append(parent)
let span = document.createElement("span");
root.append(span);
let shadowNode = root.firstElementChild;

shadowNode.addEventListener("error", t.step_func(e => {
assert_not_equals(window.event, e);
assert_equals(window.event, undefined);
}));

let windowOnErrorCalled = false;
window.onerror = t.step_func_done(() => {
windowOnErrorCalled = true;
assert_equals(typeof window.event, "object");
assert_equals(window.event.type, "error");
});

shadowNode.dispatchEvent(new ErrorEvent("error", {composed: true, bubbles: true}));
assert_true(windowOnErrorCalled);
}, "window.event is undefined inside window.onerror if the target is in a shadow tree (ErrorEvent dispatched inside shadow tree)");

async_test(t => {
let target1 = document.createElement("div");
let target2 = document.createElement("div");
Expand Down