very slow horizontal scroll
Categories
(Core :: Layout: Scrolling and Overflow, defect)
Tracking
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People
(Reporter: john.mitzka, Unassigned)
Details
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.97 Safari/537.36
Steps to reproduce:
Scrolling horizontally by clicking on the right arrow button. Just arrow, not scroll bar or scroll handle, limited to clicks on the right arrow itself.
Actual results:
Scroll speed horizontal is unusable. Seems like a pixel at a time.
Expected results:
When I turned off "general.smoothScroll.scrollbars" by setting it to false in about:config the scroll speed using the right arrow changed to a normal expected speed. However cannot tell all customers to modify their browser config so this needs fixed.
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Comment 1•6 years ago
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Does this happen on a particular site, or all sites? I tested it on planet.mozilla.org, and the right arrow button scrolls me by 20-30 pixels per click, regardless of "general.smoothScroll.scrollbars".
(Also moving to "Layout: Scrolling and Overflow" component as scrollbar button scrolling is handled entirely in layout with no APZ involvement.)
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Comment 2•6 years ago
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This happens on a page I am creating. The page contains a div and within that div is a slick grid. https://github.com/mleibman/SlickGrid
SlickGrid is basically lots of divs arranged in rows to resemble a grid or a table. The grid is within a div and the div is fully contained on the page. The scrolling happens in the div, the div has the scroll bars. Vertical scrolling is normal, horizontal scrolling (or Shift-wheel) is extremely slow.
The slow scroll is not dependent on the size of the grid. It could be just 10 rows with just one column outside of the div requiring scrolling to. It may be that if the entire page is scrolled then scrolling is normal, but I cannot test that without changing lots of code.
Horizontal scrolling of the same content is normal in Chrome.
When changing the option "general.smoothScroll.scrollbars" to false scrolling is also normal in Firefox.
I cannot show you the page or website I am creating as it is not open to the public.
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Comment 3•6 years ago
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(In reply to john.mitzka from comment #2)
I cannot show you the page or website I am creating as it is not open to the public.
Would you be able to prepare a reduced testcase based on your page, that strips out the confidential / proprietary parts while still reproducing the issue?
It might be difficult for us to diagnose the issue without being able to reproduce it.
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Comment 4•6 years ago
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I may be able to do that after my December deadline. You can close the bug report for now, if it is still an issue then I will take the time to give you something reproducible.
Thank you.
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Comment 5•6 years ago
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Thanks John. I will close the bug for now, but if you create the reduced test case, please feel free to attach it here and reopen the bug.
Description
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