Widget output function for use in Shiny.
sortable_output(input_id, width = "0px", height = "0px")output variable to use for the sortable object
Fixed width for widget (in css units). The default is
NULL, which results in intelligent automatic sizing based on the
widget's container.
Fixed height for widget (in css units). The default is
NULL, which results in intelligent automatic sizing based on the
widget's container.