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<!doctype html>
<meta charset="utf-8">
<title>window.parent: `null`</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
async_test(t => {
var iframe = document.createElement('iframe');
iframe.onload = t.step_func_done(() => {
var iWindow = iframe.contentWindow;
assert_equals(iWindow.parent, window);
document.body.removeChild(iframe);
assert_equals(iWindow.parent, null);
});
document.body.appendChild(iframe);
}, '`window.parent` is null when browsing context container element removed');
async_test(t => {
var iframe = document.createElement('iframe');
var iframe2, removedEl;
var testFunc = t.step_func(() => {
var frameWindow = iframe.contentWindow;
var frame2Window = iframe2.contentWindow;
assert_equals(frameWindow.parent, window);
assert_equals(frame2Window.parent, frameWindow);
iframe.removeEventListener('load', nestFrame);
iframe2.removeEventListener('load', testFunc);
removedEl = document.body.removeChild(iframe);
assert_equals(frameWindow.parent, null);
assert_equals(frame2Window.parent, null);
removedEl.addEventListener('load', t.step_func_done(() => {
// reattached iframe's browsing context will report window.parent again
assert_equals(removedEl.contentWindow.parent, window);
// The following window s are no longer referenced by active browsing contexts
assert_equals(frameWindow.parent, null);
assert_equals(frame2Window.parent, null);
// Per #the-iframe-element, reattaching a removed iframe will result in the
// browser creating a new browsing context once again, with a fresh
// document in our case, so the second iframe or any other elements
// previously added to iframe.contentDocument will be gone
assert_equals(removedEl.contentDocument.querySelector('iframe'), null);
assert_equals(removedEl.contentDocument.querySelector('hr'), null);
}));
document.body.appendChild(removedEl);
});
var nestFrame = function () {
iframe.contentDocument.body.appendChild(document.createElement('hr'));
iframe2 = iframe.contentDocument.createElement('iframe');
// Workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=1229707
iframe2.src = '/common/blank.html';
iframe2.addEventListener('load', testFunc);
iframe.contentDocument.body.appendChild(iframe2);
};
iframe.addEventListener('load', nestFrame);
document.body.appendChild(iframe);
}, '`window.parent` null when parent browsing context container removed');
</script>
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