// META: timeout=long const dataURL = `data:text/html,...`; const encodedDataURL = encodeURIComponent(dataURL); [dataURL, `resources/redirect.py?location=${encodedDataURL}`].forEach(url => { [undefined, "opener", "noopener", "noreferrer"].forEach(opener => { async_test(t => { const popup = window.open(url, "", opener); t.step_timeout(() => { if (opener === "noopener" || opener == "noreferrer") { assert_equals(popup, null); } else { assert_true(popup.closed); } t.done(); }, 1500); }, `Navigating a popup using window.open("${url}", "", "${opener}")`); }); });