https://bugzilla.wikimedia.org/show_bug.cgi?id=69729
Bug ID: 69729
Summary: [collapsibleTabs] Resizing of "View history" tab can
cause endless animation loop
Product: MediaWiki skins
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: Vector
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected]
Web browser: ---
Mobile Platform: ---
If the "View history" tab changes size such that becomes too large where it
before was not, an endless animation loop of collapse-expand-collapse-etc can
be triggered. A resize could be caused by an ordinary zoom (frequently resizing
the pixel width of the element by a few pixels), by a change in browser text
size preferences (likely to significantly change the width), or by a user
script modifying the text content of the element.
This appears to be caused by expandCondition in Vector.js using a cached
version of the element's width (collapsibleTabs.data's expandedWidth passed as
the eleWidth argument), while collapseCondition is checking .width() each time.
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