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<!DOCTYPE html>
<meta charset="utf-8">
<title>Navigating to a fragment should not clear forward history</title>
<link rel="help" href="https://html.spec.whatwg.org/multipage/#scroll-to-fragid">
<link rel="help" href="https://github.com/whatwg/html/issues/2796">
<link rel="help" href="https://github.com/whatwg/html/pull/2869">
<link rel="author" href="mailto:d@domenic.me" title="Domenic Denicola">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="navigate-helpers.js"></script>
<body>
<script>
"use strict";
let resolve, iframe;
promise_test(() => {
iframe = document.createElement("iframe");
iframe.src = "/common/blank.html";
iframe.addEventListener("load", runTest);
document.body.appendChild(iframe);
return new Promise(r => resolve = r);
});
function runTest() {
iframe.removeEventListener("load", runTest);
const frameWindow = iframe.contentWindow;
resolve((async () => {
await navigateAndWaitForChange(frameWindow, w => w.location.href = "/common/blank.html#apple");
await navigateAndWaitForChange(frameWindow, w => w.location.href = "/common/blank.html#banana");
await navigateAndWaitForChange(frameWindow, w => w.location.href = "/common/blank.html#cat");
assert_equals(frameWindow.location.hash, "#cat");
// Might not be 4 (= 3 for iframe + 1 initial) due to cross-browser differences or if people are
// running this test in a window that has previously been places. The important thing for this
// test is the delta from this value.
const afterThreeNavigations = frameWindow.history.length;
await navigateAndWaitForChange(frameWindow, w => w.history.back());
assert_equals(frameWindow.location.hash, "#banana");
assert_equals(frameWindow.history.length, afterThreeNavigations,
"back() must not change the history length");
await navigateAndWaitForChange(frameWindow,
w => w.location.replace("/common/blank.html#zebra"));
assert_equals(frameWindow.location.hash, "#zebra");
assert_equals(frameWindow.history.length, afterThreeNavigations,
"replace() must not change the history length");
// As of the time of this writing (2017-08-14), Firefox is not firing hashchange on forward, so
// we automatically assume navigation succeeded after 100 ms. A sibling test will test this
// particular Firefox bug.
await navigateAndWaitForChange(frameWindow, w => w.history.forward(),
{ assumeSuccessAfter: 500 });
assert_equals(frameWindow.location.hash, "#cat");
assert_equals(frameWindow.history.length, afterThreeNavigations,
"forward() must not change the history length");
})());
}
</script>
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