Sticky rows in DT table

app.R

library(shiny)

ui <- fluidPage(
  checkboxInput('yellow.only', 'Yellow Only'),
  uiOutput('fruit.selection'),
  DT::dataTableOutput("dt.fruit.selection")
)

server <- function(input, output) {
  
  fruit.options <- reactive({
    all.fruits <- c(grape='Grape', banana='Banana', papaya='Papaya', raspberry='Raspberry')
    yellow.fruits <- c(FALSE, TRUE, TRUE, FALSE)
    all.fruits[yellow.fruits | !input$yellow.only]
  })
  
  fruit.options.df <- reactive({
    data.frame(fruits=fruit.options(), some.other.col=nchar(fruit.options()))
  })
 
  output$fruit.selection <- renderUI({ selectInput('fruit', 'Fruit', choices=fruit.options(), selected=input$fruit, multiple=TRUE, selectize=FALSE, size=length(fruit.options())) })

  output$dt.fruit.selection <- DT::renderDataTable({
    if (!exists('fruit.options.cache') || identical(fruit.options.cache, fruit.options.df())) {
        rows.selected <- isolate(input$dt.fruit.selection_rows_selected)
    } else {
      rows.selected <- which(fruit.options.df()$fruit %in% fruit.options.cache$fruits[isolate(input$dt.fruit.selection_rows_selected)])
    }

    fruit.options.cache <<- fruit.options.df()
    DT::datatable(fruit.options.cache, rownames=FALSE, selection=list(mode="multiple", selected=rows.selected))
  })
}

# Run the application 
shinyApp(ui = ui, server = server)