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<!DOCTYPE html>
<title>VT object created on the old Document is skipped before persisting in BFCache</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-2/">
<link rel="author" href="mailto:khushalsagar@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="/common/dispatcher/dispatcher.js"></script>
<script src="/html/browsers/browsing-the-web/back-forward-cache/resources/helper.sub.js"></script>
<script>
// runBfcacheTest opens a popup to pageA which navigates to pageB and then
// back, ensuring pageA is stored in the BFCache.
runBfcacheTest({
funcBeforeNavigation: async () => {
// This function executes in pageA
function addTransitionOptIn() {
let css = '@view-transition { navigation: auto; }';
let style = document.createElement('style');
style.appendChild(document.createTextNode(css));
document.head.appendChild(style);
}
addTransitionOptIn();
// Wait for at least one frame to ensure there is a transition on the
// navigation.
function waitForAtLeastOneFrame() {
return new Promise(resolve => {
// Different web engines work slightly different on this area but waiting
// for two requestAnimationFrames() to happen, one after another, should be
// sufficient to ensure at least one frame has been generated anywhere.
window.requestAnimationFrame(() => {
window.requestAnimationFrame(() => {
resolve();
});
});
});
}
await waitForAtLeastOneFrame();
onpageswap = (e) => {
if (e.viewTransition == null)
return;
document.documentElement.classList.add('transition');
e.viewTransition.updateCallbackDone.then(() => {
document.documentElement.classList.add('updateCallbackDone');
});
e.viewTransition.ready.catch(() => {
document.documentElement.classList.add('ready');
});
e.viewTransition.finished.then(() => {
document.documentElement.classList.add('finished');
});
}
},
funcBeforeBackNavigation: async () => {
// This function executes in pageB
function addTransitionOptIn() {
let css = '@view-transition { navigation: auto; }';
let style = document.createElement('style');
style.appendChild(document.createTextNode(css));
document.head.appendChild(style);
}
addTransitionOptIn();
// Wait for at least one frame to ensure there is a transition on the
// navigation.
function waitForAtLeastOneFrame() {
return new Promise(resolve => {
// Different web engines work slightly different on this area but waiting
// for two requestAnimationFrames() to happen, one after another, should be
// sufficient to ensure at least one frame has been generated anywhere.
window.requestAnimationFrame(() => {
window.requestAnimationFrame(() => {
resolve();
});
});
});
}
await waitForAtLeastOneFrame();
},
funcAfterAssertion: async (pageA, pageB, t) => {
assert_true(
await pageA.execute_script(() => {
return document.documentElement.classList.contains('transition');
}),
'navigation had viewTransition');
assert_true(
await pageA.execute_script(() => {
return document.documentElement.classList.contains('updateCallbackDone');
}),
'updateCallbackDone was resolved');
assert_true(
await pageA.execute_script(() => {
return document.documentElement.classList.contains('ready');
}),
'ready was rejected');
assert_true(
await pageA.execute_script(() => {
return document.documentElement.classList.contains('finished');
}),
'finished was resolved');
},
targetOrigin: originSameOrigin,
});
</script>
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