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rshinyreactable

reactable R shiny conditional color columns on updateData

I have a shiny app which uses reactable to display the status of a task. The information is color-coded for a status column, the data is updated using updateReactable().

Initially the color-background is correct (eg red for open, green for done), but when I call updateReactable, the background color does not change.

An easy solution would be to always re-render the table, but I want to preserve user input (eg sort, filter, page-selection etc), therefore I use updateReactable.

An MWE looks like this:

library(shiny)
library(reactable)

ui <- fluidPage(
  reactableOutput("table"),
  actionButton("go", "Go")
)

d <- data.frame(x = sample(letters, 10, replace = TRUE), status = "Open")
d[1, "status"] <- "Done"

cols_bg <- c("Open" = "red", "Done" = "green")
cols_font <- c("Open" = "black", "Done" = "white")

server <- function(input, output, session) {
  # render this only once, update values later
  output$table <- renderReactable({
    reactable(d,
              columns = list(
                status = colDef(name = "Status", 
                                style = function(value) {
                                  list(background = cols_bg[[value]],
                                       fontWeight = 600, color = cols_font[[value]])
                                })
              )
    )
  })
  
  # on button-click replace some values with Done and update table
  observeEvent(input$go, {
    ids <- sample(nrow(d), 0.7*nrow(d))
    d$status[ids] <- "Done"
    updateReactable("table", d)
  })
}

shinyApp(ui, server)

After the click it looks something like this:

enter image description here

Note that all Done fields should be green.

Solution

  • As per this article for dynamic conditional styling we'll need to provide a JS function:

    library(shiny)
library(reactable)

ui <- fluidPage(reactableOutput("table"),
                actionButton("go", "Go"))

d <- data.frame(x = sample(letters, 10, replace = TRUE), status = "Open")
d[1, "status"] <- "Done"

server <- function(input, output, session) {
  output$table <- renderReactable({
    reactable(d,
              columns = list(status = colDef(
                style =  JS(
                  "function(rowInfo) {
                                if (rowInfo.values['status'] == 'Open') {
                                  return { backgroundColor: 'red', color: 'black', fontWeight: 600}
                                } else if (rowInfo.values['status'] == 'Done') {
                                  return { backgroundColor: 'green', color: 'white', fontWeight: 600 }
                                } else {
                                  return { backgroundColor: 'grey', color: 'black', fontWeight: 600 }
                                }
                              }"
                )
              )))
  })
  
  # on button-click replace some values with Done and update table
  observeEvent(input$go, {
    ids <- sample(nrow(d), 0.7 * nrow(d))
    d$status[ids] <- "Done"
    updateReactable("table", d)
  })
}

shinyApp(ui, server)

    result