| <!DOCTYPE html><!-- webkit-test-runner [ useFlexibleViewport=true AsyncFrameScrollingEnabled=true ] --> |
| <html> |
| <head> |
| <meta name="viewport" content="width=device-width, initial-scale=1"> |
| </head> |
| <body> |
| <script src="../../../resources/js-test.js"></script> |
| <script> |
| |
| if (window.internals) |
| internals.settings.setAsyncFrameScrollingEnabled(true); |
| |
| description(`This tests programming scrolling via element.scrollIntoView to an element inside an iframe position well above the viewport top<br> |
| WebKit should clamp the scroll top to 0px.`); |
| |
| const iframe = document.createElement('iframe'); |
| document.body.append(iframe); |
| iframe.style.position = 'absolute'; |
| iframe.style.top = '-1000px'; |
| iframe.style.height = '1050px'; |
| iframe.contentDocument.body.innerHTML = '<div id="target" style="position: absolute; top:2000px; height: 20px;">some content</div>'; |
| const target = iframe.contentWindow.target; |
| |
| target.scrollIntoView({block: 'end'}); |
| shouldBe('document.documentElement.scrollTop', '0'); |
| shouldBe('visualViewport.pageTop', '0'); |
| shouldBe('iframe.contentDocument.documentElement.scrollTop', '0'); |
| shouldBeTrue('iframe.contentWindow.visualViewport.pageTop > 900'); |
| shouldBe('iframe.contentWindow.visualViewport.pageTop', 'target.offsetTop + target.offsetHeight - iframe.clientHeight'); |
| |
| </script> |
| </body> |
| </html> |
