window.location.replace(...) is better than using window.location.href, because replace() does not keep the originating page in the session history, meaning the user won't get stuck in a never-ending back-button fiasco.
If you want to simulate someone clicking on a link, use location.href
If you want to simulate an HTTP redirect, use location.replace
// similar behavior as an HTTP redirect
// similar behavior as clicking on a link
window.location.href = "http://stackoverflow.com";
window.location = "https://stackoverflow.com";