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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /navigation-api/precommit-handler/precommitHandler-javascript-url-before-commit.html - WPT Dashboard Interop Dashboard
<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<script>
// A navigate event that is intercepted with a precommitHandler stays
// ongoing for as long as that handler's promise is pending: the URL doesn't
// change and the navigation isn't committed. Starting a second navigation
// while the first one is parked like this has to abort the parked one.
//
// #navigate step 20 ("Set the ongoing navigation for navigable to
// navigationId.") runs for every scheme, and a changed value makes
// #set-the-ongoing-navigation step 2 abort whatever was ongoing. Only
// afterwards does #navigate step 21 queue the task that evaluates a
// javascript: URL and replaces the document. So the parked navigate event
// must already be aborted by the time the old document is unloaded.
//
// This test parks a fragment navigation in its precommitHandler, navigates
// the same window to a javascript: URL, and checks at pagehide that the
// parked event was aborted.
promise_test(async t => {
const iframe = document.createElement("iframe");
iframe.src = "/common/blank.html";
document.body.appendChild(iframe);
await new Promise(resolve => (iframe.onload = resolve));
const win = iframe.contentWindow;
let signal;
let precommitHandlerReached;
const reached = new Promise(
resolve => (precommitHandlerReached = resolve)
);
win.navigation.addEventListener(
"navigate",
e => {
signal = e.signal;
e.intercept({
precommitHandler: () => {
precommitHandlerReached();
// Never resolves, so the navigate event stays ongoing.
return new Promise(() => {});
},
});
},
{ once: true }
);
win.location.hash = "#ShouldNotCommit";
await reached;
assert_false(signal.aborted, "aborted before the javascript: URL");
const abortedAtPagehide = new Promise(resolve =>
win.addEventListener("pagehide", () => resolve(signal.aborted), {
once: true,
})
);
win.location.href = "javascript:'new document'";
assert_true(await abortedAtPagehide, "aborted before pagehide");
}, "A javascript: URL navigation aborts a navigate event whose precommitHandler is still pending");
</script>
</body>