// META: script=resources/document-open-side-effects.js async_test(t => { const iframe = document.body.appendChild(document.createElement("iframe")); t.add_cleanup(() => iframe.remove()); self.testSynchronousScript = t.step_func(() => { // Here, the entry settings object is still the iframe's. Delay it in such // a way that makes the entry settings object the top-level page's, but // without delaying too much that the parser becomes inactive. A microtask // is perfect as it's executed in "clean up after running script". Promise.resolve().then(t.step_func_done(() => { const origURL = iframe.contentDocument.URL; assertDocumentIsReadyForSideEffectsTest(iframe.contentDocument, "active parser whose script nesting level is greater than 0"); assert_equals(iframe.contentDocument.open(), iframe.contentDocument); assertOpenHasNoSideEffects(iframe.contentDocument, origURL, "active parser whose script nesting level is greater than 0"); })); }); iframe.src = "resources/bailout-order-synchronous-script-frame.html"; }, "document.open bailout should not have any side effects (active parser whose script nesting level is greater than 0)");