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<!DOCTYPE html>
<title>window.event tests</title>
<link rel="author" title="Mike Taylor" href="mailto:miketaylr@gmail.com">
<script src="/resources/testharness.js"></script>
<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);
}, "event exists on window, which is initially set to undefined");
async_test(t => {
let target = document.createElement("div");
assert_equals(window.event, undefined, "undefined before dispatch");
let clickEvent = new Event("click");
target.addEventListener("click", t.step_func_done(e => {
assert_equals(window.event, clickEvent, "window.event set to current event during dispatch");
}));
target.dispatchEvent(clickEvent);
assert_equals(window.event, undefined, "undefined after dispatch");
}, "window.event is only defined during dispatch");
async_test(t => {
let parent = document.createElement("div");
let root = parent.attachShadow({mode: "closed"});
let span = document.createElement("span");
root.appendChild(span);
span.addEventListener("test", t.step_func(e => {
assert_equals(window.event, undefined);
assert_not_equals(window.event, e);
}));
parent.addEventListener("test", t.step_func_done(e => {
assert_equals(window.event, e);
assert_not_equals(window.event, undefined);
}));
parent.dispatchEvent(new Event("test", {composed: true}));
}, "window.event is undefined if the target is in a shadow tree (event dispatched outside shadow tree)");
async_test(t => {
let parent = document.createElement("div");
let root = parent.attachShadow({mode: "closed"});
let span = document.createElement("span");
root.appendChild(span);
let shadowNode = root.firstElementChild;
shadowNode.addEventListener("test", t.step_func((e) => {
assert_not_equals(window.event, e);
assert_equals(window.event, undefined);
}));
parent.addEventListener("test", t.step_func_done(e => {
assert_equals(window.event, e);
assert_not_equals(window.event, undefined);
}));
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");
target2.addEventListener("dude", t.step_func(() => {
assert_equals(window.event.type, "dude");
}));
target1.addEventListener("cool", t.step_func_done(() => {
assert_equals(window.event.type, "cool", "got expected event from global event during dispatch");
target2.dispatchEvent(new Event("dude"));
assert_equals(window.event.type, "cool", "got expected event from global event after handling a different event handler callback");
}));
target1.dispatchEvent(new Event("cool"));
}, "window.event is set to the current event during dispatch");
async_test(t => {
let target = document.createElement("div");
target.addEventListener("click", t.step_func_done(e => {
assert_equals(e, window.event);
}));
target.dispatchEvent(new Event("click"));
}, "window.event is set to the current event, which is the event passed to dispatch");
</script>
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