Column alignment in DT datatable

Question

In my shiny app I am using datatable function from DT library to construct a table and want to align columns on center. I can use formatStyle('column', textAlign = 'center') but it affects only column body and not the header.

Answer 1

You have to set columnDefs in the argument option of the function datatable.

Look the example below

 library(DT)
 datatable(head(iris), rownames = FALSE, options = list(
 columnDefs = list(list(className = 'dt-center', targets = 0:4))
))

OBS. You have to set the target. In the example all the 5 columns are aligned to "center" (targets = 0:4). Finally, note that column numbers start from 0, not from 1. That's a Javascript feature I suspect. But I am not an expert of JS.. Anyway this worked for me :)