ResponsiveMobile is a general mobile stylesheet to make the desktop skin responsive for devices with width less than 768px (the lowest site width breakpoint).
The code has no documentation
Global navigation and notification screen dropdowns may not be positioned properly
Some special pages may not work
Content may sometimes be too wide that it overflows from the page.
It is recommended to use the 2010 Source Editor because the default editors (VisualEditor/2017 Source Editor) is very buggy and unoptimized for mobile.
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