Rajan Rajan - 3 months ago 69
R Question

Footer alignment in shiny app dashboard

I am trying to insert footer in shiny app dashboard in bottom and centre of the page. But it is coming in the centre of the body. Also I am unable to place it in the bottom of the page

Here is my code:

library(shiny)
library(shinydashboard)
library(DT)
library(ggvis)
library(shiny)

ui <- dashboardPage(
dashboardHeader(title = "Dashboard"),
dashboardSidebar(sidebarMenu(
menuItem("Instructions", tabName = "genIns", icon = icon("info-circle")),
menuItem("Data", tabName = "data", icon = icon("table"))

)),
dashboardBody(
tabItems(
# First tab content
tabItem(tabName = "genIns",
fluidPage(
titlePanel("General Instruction will go here"))
),
# Second tab content
tabItem(tabName = "data",
sliderInput("bins",
"Number of bins:",
min = 1,
max = 50,
value = 30),
plotOutput("distPlot")
)

),
tags$footer("My footer", align = "center")
)
)


server.ui

shinyServer(function(input, output, session) {

output$distPlot <- renderPlot({
x <- faithful[, 2] # Old Faithful Geyser data
bins <- seq(min(x), max(x), length.out = input$bins + 1)

# draw the histogram with the specified number of bins
hist(x, breaks = bins, col = 'darkgray', border = 'white')
})
})

Answer

You can wrap dashbordPage into tagList and then place tags$footer as a second argument to tagList. You can also further modify the style of your footer with css.


Full example:

library(shiny)
library(shinydashboard)
library(DT)
library(ggvis)
library(shiny)

ui <- tagList(
  dashboardPage(
    dashboardHeader(title = "Dashboard"),
    dashboardSidebar(sidebarMenu(
      menuItem("Instructions", tabName = "genIns", icon = icon("info-circle")),
      menuItem("Data", tabName = "data", icon = icon("table"))

    )),
    dashboardBody(
      tabItems(
        # First tab content
        tabItem(tabName = "genIns",
                fluidPage(
                  titlePanel("General Instruction will go here"))
        ),
        # Second tab content
        tabItem(tabName = "data",
                sliderInput("bins",
                            "Number of bins:",
                            min = 1,
                            max = 50,
                            value = 30),
                plotOutput("distPlot")
        )

      )

    )

  ),#end dashboardPage
  tags$footer("My footer", align = "center", style = "
              position:absolute;
              bottom:0;
              width:100%;
              height:50px;   /* Height of the footer */
              color: white;
              padding: 10px;
              background-color: black;
              z-index: 1000;")

)#end tagList


server <- shinyServer(function(input, output, session) {

  output$distPlot <- renderPlot({
    x    <- faithful[, 2]  # Old Faithful Geyser data
    bins <- seq(min(x), max(x), length.out = input$bins + 1)

    # draw the histogram with the specified number of bins
    hist(x, breaks = bins, col = 'darkgray', border = 'white')
  })
})

shinyApp(ui, server)
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