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<html>
<head>
<script>
// Note, this page does not enter bfcache because of an HTTP header.
// Ensure layout is flushed before doing anything with scrolling.
function flushAndExecute(callback) {
window.requestAnimationFrame(function() {
setTimeout(callback);
});
}
var bc = new BroadcastChannel("notbfcached");
bc.onmessage = (msgEvent) => {
if (msgEvent.data == "scroll") {
flushAndExecute(() => { window.scrollTo(0, 4000); });
} else if (msgEvent.data == "getScrollY") {
flushAndExecute(() => { bc.postMessage({ scrollY: window.scrollY}); });
} else if (msgEvent.data == "back") {
flushAndExecute(() => { bc.close(); history.back(); });
} else if (msgEvent.data == "close") {
bc.postMessage("closed");
bc.close();
window.close();
}
};
window.onpageshow = (event) => {
bc.postMessage({command: "pageshow", persisted: event.persisted});
};
</script>
</head>
<body>
<div style="height: 5000px; border: 1px solid black;">content</div>
</body>
</html>