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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /shadow-dom/event-composed-path-after-dom-mutation.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<title>Shadow DOM: Event.composedPath() should return the same result even if DOM is mutated</title>
<meta name="author" title="Hayato Ito" href="mailto:hayato@google.com">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/shadow-dom.js"></script>
<div id="test1">
<div id="host">
<template id="sr" data-mode="closed">
<div id="target"></div>
</template>
</div>
</div>
<script>
async_test((t) => {
const n = createTestTree(document.querySelector('#test1'));
n.host.addEventListener('my-event', t.step_func((e) => {
const path_before = e.composedPath();
// Move the target out of a closed shadow tree
n.host.append(n.target);
const path_after = e.composedPath();
assert_array_equals(path_before, path_after);
t.done();
}));
const event = new Event('my-event', { bubbles: true, composed: true });
n.target.dispatchEvent(event);
}, 'Event.composedPath() should return the same result even if DOM is mutated (1/2)');
</script>
<div id="test2">
<div id="host1">
<template id="sr1" data-mode="closed">
<div id="host2">
<template id="sr2" data-mode="open">
<div id="target"></div>
</template>
</div>
</template>
</div>
</div>
<script>
async_test((t) => {
const n = createTestTree(document.querySelector('#test2'));
n.host1.addEventListener('my-event', t.step_func((e) => {
const path_before = e.composedPath();
// Move nodes out of a closed shadow tree
n.host1.append(n.host2);
n.host1.append(n.target);
const path_after = e.composedPath();
assert_array_equals(path_before, path_after);
t.done();
}));
const event = new Event('my-event', { bubbles: true, composed: true });
n.target.dispatchEvent(event);
}, 'Event.composedPath() should return the same result even if DOM is mutated (2/2)');
</script>