Display cell value in tooltip after hovering over a cell in DT::datatable

Question

How do I utilize javascript to display the cell value in a tooltip after hovering over a particular cell in a DT::datatable? I decided to hide the long text after a certain

Answer 1

Here is a solution with the newly available plugin ellipsis.

library(DT) # version 0.5

dat <- data.frame(
  A = c("fnufnufroufrcnoonfrncacfnouafc", "fanunfrpn frnpncfrurnucfrnupfenc"),
  B = c("DZDOPCDNAL DKODKPODPOKKPODZKPO", "AZERTYUIOPQSDFGHJKLMWXCVBN")
)

datatable(
  dat, 
  plugins = "ellipsis",
  options = list(
    columnDefs = list(list(
      targets = c(1,2),
      render = JS("$.fn.dataTable.render.ellipsis( 17, false )")
    ))
  )
)

Documentation of the plugin: https://datatables.net/plug-ins/dataRender/ellipsis