Elements with position: fixed don't grow to reserve space for a vertical scrollbar when the need for a vertical scrollbar changes
Categories
(Core :: Layout: Scrolling and Overflow, defect)
Tracking
()
People
(Reporter: mark.falconbridge, Unassigned)
Details
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0
Steps to reproduce:
Using the jsfiddle here - https://jsfiddle.net/xp8e396s/1/ in a Windows 10 environment
(1) Go to the jsfiddle above and click the "Toggle Content Height" button
(2) Notice that a vertical scroll bar is added (this is correct) but no extra space is used for it so the content is hidden.
(3) Note that a horizontal scroll bar is also added, this is incorrect as the content hasn't yet reached the max-width.
Actual results:
No extra space was provided for the vertical scroll bar so the content is obscured.
A horizontal scroll bar was added.
Expected results:
Extra space should be reserved for the vertical scroll bar so that the content can be fully seen up until a max-width is hit.
The horizontal scroll bar should only be added when the max width has been reached.
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Comment 1•2 years ago
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The Bugbug bot thinks this bug should belong to the 'Core::Panning and Zooming' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.
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Updated•2 years ago
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Comment 2•2 years ago
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This is a version of bug 764076. The problem here is that we're not making the fixed-position element wide enough to account for the scrollbar (which we hypothetically could do, but it's complicated).
Description
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