Including proportion_bar into formatter

[TBaill]

Hi there,

I am using formatter function into the formattable package and it works great.
But I'd like to use proportion_bar into formatter for a same variable but it doesn't work.

Here is my code :

formattable(eval, list( 
  area(col = c(Trimestre1, Trimestre2, Trimestre3, Trimestre4)) ~ proportion_bar(c("lightblue"), 0.2),
  Moyenne = proportion_bar(c("lightblue"),0.2),
  Moyenne = formatter("span",
                  style = x ~ style(color = ifelse(rank(-x) <= 3, "green", "gray")),
                  x ~ sprintf("%.2f (rang: %3.f)", x, round(rank(-x),1))
                         )
                      )
                  )

The result :

But I would like to apply the proportion_bar to my last variable Moyenne to see the proportion AND to have sprintf("%.2f (rang: %3.f)" as the value for my column.

Any ideas ?

Thanks a lot !