| Summary: | A vertical scrollbar is shown when none is necessary | ||||||
|---|---|---|---|---|---|---|---|
| Product: | WebKit | Reporter: | Simon Fraser (smfr) <simon.fraser> | ||||
| Component: | Layout and Rendering | Assignee: | Nobody <webkit-unassigned> | ||||
| Status: | NEW --- | ||||||
| Severity: | Normal | CC: | bfulgham, simon.fraser, webkit-bug-importer, zalan | ||||
| Priority: | P2 | Keywords: | InRadar | ||||
| Version: | Safari Technology Preview | ||||||
| Hardware: | Unspecified | ||||||
| OS: | Unspecified | ||||||
| See Also: | https://bugs.webkit.org/show_bug.cgi?id=256298 | ||||||
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This is about code in in `FrameView::adjustScrollbarsForLayout()` that forces on the vertical scrollbar for the first layout, but doesn't compute that it can remove it again and still fit the content. The state is unstable; some future layout can cause the scrollbar to disappear. |
Created attachment 460775 [details] Testcase When the content size matches the view size (or the iframe size), then we'll create a vertical scrollbar and trigger vertical scrolling when it's not necessary (when scrollbars take space, i.e. non-overlay scrollbars). Turn on always-on scrollbars. Load the attached testcase Size the window so that the gray rectangle just covers the web view. Reload; note how a vertical scrollbar appears. Now size the window from the bottom, making it slightly taller then shorter, back to the original size. Note how you can make the scrollbar go away.