| <!-- NOTE: Quirks mode document --> |
| <style> |
| body { |
| overflow: scroll; |
| height: 500px; |
| width: 500px; |
| } |
| #spacer { |
| height: 10000px; |
| } |
| </style> |
| <html> |
| <body> |
| <div id=spacer></div> |
| </body> |
| </html> |
| <script src="../../../resources/js-test.js"></script> |
| <script> |
| description('Verify that document.scrollingElement updates style in quirks mode without triggering layout'); |
| setPrintTestResultsLazily(); |
| |
| document.body.offsetTop; |
| shouldBe("internals.needsLayoutCount()", "0"); |
| |
| document.body.style.padding = "10px"; |
| shouldBe("document.scrollingElement", "document.body"); |
| debug("Verifying layout hasn't been triggered"); |
| shouldBe("internals.needsLayoutCount()", "3"); |
| debug("But style update was"); |
| shouldBe("internals.updateStyleAndReturnAffectedElementCount()", "0"); |
| |
| document.documentElement.style.overflow = "scroll"; |
| |
| // Workaround crbug.com/486034 to foce body style to be considered dirty |
| document.body.style.padding = "8px"; |
| |
| debug("Verify style change is reflected - body is now a real scrolling block element"); |
| shouldBeNull("document.scrollingElement"); |
| debug("Verifying layout still hasn't been triggered"); |
| shouldBe("internals.needsLayoutCount()", "3"); |
| </script> |
