1997120 - www.digitalcitizen.life - The scroll position resets to the top of the page when resizing the browser window size

Status: NEW

(Web Compatibility :: Site Reports, defect, P3)

Description

[Raul Bucata]

Environment:
Operating system: Windows 10
Firefox version: Firefox 144.0

Steps to reproduce:

1. Navigate to:https://www.digitalcitizen.life/minimize-maximize-apps-windows/
2. Scroll a bit
3. Resize the browser window size and observe

Expected Behavior:
The scroll position is mainly kept

Actual Behavior:
The scroll position is reset to the top

Notes:

• Reproduces regardless of the status of ETP
• Reproduces in firefox-nightly, and firefox-release
• Does not reproduce in chrome

Created from https://github.com/webcompat/web-bugs/issues/185682

Comment 1

[Raul Bucata]

This happens because the page reloads when resizing the browser window, in both Chrome and Firefox, but Chrome kind of keeps the scroll position.

Comment 2

[Raul Bucata]

Attachment: Chr vs ff

Comment 3

[Sky Schubert [:skyschub]]

So the page is just... reloading itself on resize. I don't know why either. It's doing that in Chrome, too, but Chrome is keeping the scroll position.

Comment 4

[Alice0775 White]

Regression window:
https://hg-edge.mozilla.org/integration/autoland/pushloghtml?fromchange=1f622156e9eab1d2c58d5d77bb5908fcc83db253&tochange=dbb8e4a9609d4531edb8d42898d897cc9df10fc6

So, this seems to be not a regression, but block Bug 1570566.

Comment 5

[Alice0775 White]

• When manually reloading the page without resizing, the scroll position appears to be preserved.
• However, when reloading via resizing in STR, the scroll position is not preserved.

Comment 6

[Hiroyuki Ikezoe (:hiro)]

It's not easy to diagnose. While I was wondering how Chrome handles this case, the site started blocking my request. I get "Exceeded the maximum number of page requests per minute for humans.".

Comment 7

[Hiroyuki Ikezoe (:hiro)]

The reason why we don't restore the scroll position is we get null history state here in nsDocShell::GetLayoutHistoryState after reloading.

It doesn't look apz related.

Comment 8

[Hiroyuki Ikezoe (:hiro)]

When the window gets resized, the following function is called.

  function reloadPage() {
    window.location.reload(true); 
  }

With the boolean argument we set LOAD_FLAGS_BYPASS_CACHE|LOAD_FLAGS_BYPASS_PROXY. That's the reason why we've lost the scroll position.