[c]@scottjehl, Filament Group, Inc. MIT/GPL
Sometimes, complex responsive layouts are hindered by source order. This pattern allows you to control where an element should be in the DOM by setting one of its potential parent containers (paired in the source with matching data-set attributes) to display: block at a particular breakpoint.
You might find this useful when embedding ads that need to be early in the source on a small-screen device, but later in the source in a desktop scenario. Or perhaps you'd use it to serve mobile-first navigation at the end of the page, while ensuring it's up top at wider viewports. Either way, this pattern can alleviate the need for server-side reliance when negotiating source-order discrepancies across layouts.
Sample appendAround Element