https://bugzilla.wikimedia.org/show_bug.cgi?id=64719
Bug ID: 64719
Summary: Drop use of nth-child selector in ui.less
Product: MobileFrontend
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: stable
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected]
Web browser: ---
Mobile Platform: ---
One of the important things to understand about how browsers read your CSS
selectors, is that they read them from right to left.
This means the first thing that is read in the rule .header > *:nth-child(3) is
:nth-child(3)
Looking closely at the performance issues documented in bug 64709 - a big cause
of the lag is this selector. Removing it from ui.less improves performance to
the same standard as the desktop site.
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