Closed
Bug 489667
Opened 16 years ago
Closed 15 years ago
document.onmousedown grabs scrollbar mouse clicks
Categories
(Core :: DOM: UI Events & Focus Handling, defect)
Tracking
()
RESOLVED
FIXED
People
(Reporter: matt, Unassigned)
References
()
Details
Attachments
(1 file)
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173 bytes,
text/html
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Details |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2a1pre) Gecko/20090421 Minefield/3.6a1pre ID:20090421030958
If a top-level document has an onmousedown event handler, the handler will get called when the document's scroll bars are clicked, with an event.target.tagName of "HTML". In the example URL, this prevents simple clicks from working on the scrollbars, though dragging the scroll thumb still works.
This bug has broken the scroll bar in the Zimbra web client in Firefox 3.6. Here's a small test case to help repro:
<html>
<HEAD>
<TITLE>Bug</TITLE>
</HEAD>
<SCRIPT TYPE="text/javascript">
document.onmousedown = function() { return false };
</SCRIPT>
<BODY>
<div style="height:1000px">Firefox. </div>
<div style="height:1000px">Firefox. </div>
<div style="height:1000px">Firefox. </div>
</BODY>
</HTML>
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Comment 2•15 years ago
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Regression range would be very useful.
(Though, IMO the behavior that preventing default handling on mousedown disables
click events on scrollbar makes sense. Unfortunately if that is not what web
expects, the old behavior may be needed.)
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Comment 3•15 years ago
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One could also argue that you shouldn't be able to prevent default behavior for clicks on native controls like scrollbars (or selects, etc). Either way, the behavior has changed.
The fix for affected elements in Zimbra was to make sure mousedown/mouseup return true and do not call preventDefault().
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Comment 4•15 years ago
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I'm also seeing this problem on OS X, new in FF 3.6.
FWIW, the difference here is that with FF 3.5, returning false from a mousedown event would still allow the native controls to continue. The event code would still be triggered on the underlying DOM element, which seems a bit odd to me.
In FF 3.6, returning false from a mousedown (and perhaps click?) event will fail the native controls.
See bug 511075 comment 27 (dup?)
Hi,
this issue also exists for roundcube webmail's users.
cf. http://trac.roundcube.net/ticket/1486472
And this is a very annoying one because... hey! because I read my emails with roundcube. :)
Bug 511075 should fix this
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Comment 8•15 years ago
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Just confirmed that Firefox 3.6.4 beta no longer has the scrollbar issue in Zimbra 5.0.21.
This bug can probably be marked a duplicate of 511075
Fixed with bug 511075.
Status: NEW → RESOLVED
Closed: 15 years ago
Resolution: --- → FIXED
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Assignee | |
Updated•6 years ago
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Component: Event Handling → User events and focus handling
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Description
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