responsive.RdA responsive argument may be a single value or a named list. Possible names
includes default or xs, sm, md, lg, and xl. Specifying a single
unnamed value is equivalent to specifying default or xs. The possible
values will be described in the specific help page. Most responsive arguments
will default to NULL in which case no corresponding style is applied.
Responsive arguments allow you to apply styles to tag elements based on the
size of the viewport. This is important when developing applications for both
web and mobile. Specifying a single unnamed value the style will be applied
for all viewport sizes. Use the names above to apply a style for viewports of
that size and larger. For example, specifying list(default = x, md = y)
will apply x on extra small and small viewports, but for medium, large, and
extra large viewports y is applied.
Styles for larger viewports take precedence. See below for details about each breakpoint.
extra small
How: pass a single value, use name xs, or use name default.
When: the style is always applied, unless supplanted by a style for any other viewport size.
small
How: use name sm.
When: the style is applied when the viewport is at least 576px wide, think landscape phones.
medium
How: use name md.
When: the style is applied when the viewport is at least 768px wide, think tablets.
large
How: use name lg.
When: the style is applied when the viewport is at least 992px wide, think laptop or smaller desktops.
extra large
How: use name xl.
When: the style is applied when the viewport is at least 1200px wide, think large desktops.