| flex_content | R Documentation | 
The flex_content() function adjusts how a tag element's child elements
align as a group on the cross axis (see flex_justify() for more info about
the main and cross axis of a flex element). Note, this alignment has no
effect on a single row of child elements.
flex_content(x, ...)
| x | A tag element or .style pronoun. | 
| ... | A character string specifying the cross axis alignment. One of, 
 | 
An object of the same type as x.
Other flex utilities: 
flex_align(),
flex_direction(),
flex_display(),
flex_justify(),
flex_wrap(),
item_align(),
item_fill(),
item_grow(),
item_order()
library(htmltools)
div(
  .style %>%
    flex_display() %>%
    flex_content("center") %>%
    flex_wrap(TRUE),
  div("Flex item"),
  div("Flex item"),
  div("Flex item"),
  div("Flex item"),
  div("Flex item")
)
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