There seems to be a major bug with auto scrolling that starts when one is writing "over the edge" of the currently visible browser viewport.
Steps to reproduce:
- Visit a permalink of a topic (problem might be exclusive to topics as I can't reproduce it right now on a whole board)
- Click "Reply" or the reply box at the bottom
- Now start entering blank lines (just keep repeatedly pushing the enter key)
- At some point the lower edge of the input field reaches the bottom of the currently visible browser viewport
- Keep entering newlines (or maybe also some text from time to time to be able to better observe the problem)
Expected behaviour:
- Flow should keep the active line (therefore the last line if you followed the steps above) in sight, therefore at the bottom of the page.
Actual behaviour:
- At some point (soon after reaching the original end of the page) the automatic scrolling goes totally crazy.
- It starts with the text jumping around by some pixels every time one is entering a character
- Soon after the whole page is jumping around by multiple lines whenever entering a character
- the active line is only quickly in the visible browser viewport when entering the character; quickly after the viewport is jumping back up the page and the active line is hidden.
The above occurs for me on Windows 7 using Firefox 27.0.1
Version: unspecified
Severity: major
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=61938
https://bugzilla.wikimedia.org/show_bug.cgi?id=58657