Superfluous blank on the bottom of webpage on some websites
Categories
(Core :: Layout, defect)
Tracking
()
People
(Reporter: Tom25519, Unassigned)
Details
Attachments
(6 files)
Firefox.png
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:124.0) Gecko/20100101 Firefox/124.0
Steps to reproduce:
- Open a webpage of https://www.msdmanuals.cn, such as https://www.msdmanuals.cn/professional/infectious-diseases/viruses/types-of-viral-disorders
- Go to bottom of the webpage.
Actual results:
Here's a superfluous blank.
Expected results:
This bug shouldn't appear.
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Comment 3•6 months ago
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I can confirm that I see the unexpected blank area (with borders on what corresponds to the left-hand sidebar section) in Firefox on macOS.
It seems to be connected to the sidebar element
<div class="main__sidebar sidebar main__sidebar--topic" style="top: 194.5px; min-height: unset; height: 725px;">
which has a height that is apparently computed and set by the page when loaded (the actual dimension varies depending on the window size). If I use the inspector to alter or remove the height property there, I can reduce or eliminate this unwanted blank area.
It's not clear to me exactly what's going on here, and whether the problem is that we're mishandling the flex layout in some way, or if it's an issue with how the page tries to calculate the height to apply to that sidebar.
On https://www.msdmanuals.com/professional/infectious-diseases/viruses/types-of-viral-disorders, It seems that webpage lacks a "UP NEXT: OVERVIEW OF VIRUSES..." button on the top of website on Firefox.
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Comment 7•6 months ago
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(In reply to Tom25519 from comment #6)
On https://www.msdmanuals.com/professional/infectious-diseases/viruses/types-of-viral-disorders, It seems that webpage lacks a "UP NEXT: OVERVIEW OF VIRUSES..." button on the top of website on Firefox.
I can't reproduce this issue; that text (it's not really a button) appears if I scroll further up beyond the initial load position of the page. Scrolling a step further causes it to navigate to the previous page, as that message suggests. (And scrolling to the bottom of the Overview of Viruses page does a similar transition the other way, with an "up next" message below the main page content, and then navigates to the following page.)
Note that when taking a screenshot of the page, the "up next" message won't be visible unless the page was scrolled to the position where it appears at the time the screenshot is captured. I assume this is because the site is dynamically inserting it in response to the scrolling action.
(I also see indications in the page source that this is part of an "autoload" feature that could potentially be enabled or disabled, though I haven't noticed any settings for the user to disable it, so not sure if that's relevant.)
This bug also happens on https://www.xunlei.com/.
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Comment 10•5 months ago
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Comment 11•4 months ago
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This bug also happens on https://www.36kr.com/p/2508107664900356.
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Comment 12•4 months ago
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It's still happening from years then, I can do it any time. Looks a glitch involving the top panel to me, in fact the size of the blank one is the same as the top panel. The blank panel appears whenever I show the top one or hide it. Most of the time makes the pages to hang quite a bit.
https://drive.google.com/file/d/1PPOnfuanwQNg3eAdZR40VRPWnuQtmQZ-/view?usp=sharing
Also, it's possible that no one with a powerful computer can never reproduce it because it might happen only on weaker ones. In fact mine is a Asus K52N, with the only differences (compared with the factory model) that I have Zorin OS Core 17.1 and increased the RAM to 5,9 GB, by what I know nothing else was changed.
Description
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