| <!DOCTYPE html> |
| <script src="../../resources/js-test.js"></script> |
| <body> |
| <script> |
| description("Tests that the document element has effectiveLangKnownToMatchDocumentElement flag set to true"); |
| |
| var frame, iframeDocElement, newDocElement, body; |
| |
| if (window.internals) { |
| shouldBeTrue('internals.effectiveLangKnownToMatchDocumentElement(document.documentElement)'); |
| |
| frame = document.createElement("iframe"); |
| frame.srcdoc = "<!DOCTYPE html><html lang=en><body>"; |
| document.body.append(frame); |
| |
| frame.onload = function() { |
| iframeDocElement = frame.contentDocument.documentElement; |
| shouldBeTrue('internals.effectiveLangKnownToMatchDocumentElement(iframeDocElement)'); |
| iframeDocElement.remove(); |
| shouldBeFalse('internals.effectiveLangKnownToMatchDocumentElement(iframeDocElement)'); |
| body = iframeDocElement.querySelector("body"); |
| shouldBeTrue('internals.effectiveLangKnownToMatchDocumentElement(body)'); |
| newDocElement = frame.contentDocument.createElement("html"); |
| newDocElement.lang = "de"; |
| frame.contentDocument.append(newDocElement); |
| shouldBeTrue('internals.effectiveLangKnownToMatchDocumentElement(newDocElement)'); |
| frame.remove(); |
| finishJSTest(); |
| }; |
| |
| var jsTestIsAsync = true; |
| } else |
| testFailed("This test requires window.internals"); |
| </script> |
| </body> |
