How to get Leaflet for R use 100% of Shiny dashboard height

Question

I am in the process of creating a Shiny dashboard application, where the dashboard body is supposed to show some maps. So far no problem to get the map expand over the entir

Answer 1

Building on the answer of @K. Rohde I've been using a custom css file containing

#map {
    height: calc(100vh - 130px) !important;
}

@media only screen and (min-width: 768px) {
    #map {
    height: calc(100vh - 80px) !important;
    }
}

Answer 2

I personally found, that setting the height relative to window-size is more satisfying. Height as percentage does not work, because the dashboardBody has undefined height. But relative to the whole document is okay.

100% of the dashoboardBody makes 100vh (ccs3-unit) minus header (minimum 50px) minus dashboardBody padding (2* 15px).

So, set the height to 100vh - 80px and you should be fine.

Since shiny does not support css3-units, this has to be included directly to the document, like in the code below.

library(shiny)
library(shinydashboard)
library(leaflet)

ui <- dashboardPage(
  dashboardHeader(),
  dashboardSidebar(),
  dashboardBody(
    tags$style(type = "text/css", "#map {height: calc(100vh - 80px) !important;}"),
    leafletOutput("map")
  )
)

server <- function(input, output) {
  output$map <- renderLeaflet({
    leaflet() %>% addTiles() %>% setView(42, 16, 4)
  })
}

runApp(shinyApp(ui, server), launch.browser = TRUE)

Have fun!

Answer 3

You can also do it if you want to combine your leaflet map with another kind of panel structures like a navBarPage, including the map in a tabPanel:

tags$style(type = "text/css", "html, body {width:100%;height:100%}"), tags$style(type = "text/css", "#map {height: calc(100vh - 80px) !important;}"), leafletOutput("map", width = "100%", height = "100%"),

Answer 4

Try adding the pixel size manually:

...
  dashboardBody(
    tabItems(
      tabItem(
        tabName = "m_water",
        box(
          title = "Baltic catchment areas",
          collapsible = TRUE,
          width = "100%",
          height = "1000px",
          leafletOutput("l_watershed",width="100%",height="1000px")
        )
      ),
      tabItem(
        tabName = "m_pop",
        # Map in Dashboard
        leafletOutput("l_population",width="100%",height="1000px")
      ),
      tabItem(
        tabName = "charts",
        h2("Second tab content")
      )
    )
  )
...

Answer 5

Th vh unit is not working for some old mobile browser. This css below should work for computer and mobile.

/* for computer */
div.outer {
     height: calc(100vh - 80px);
     padding: 0;
     margin: 0;
     min-height: 500px
}

@media all and (max-width:768px){
/* for mobile */
div.outer  {
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  padding: 0;
}
}

Answer 6

Another option is what jcheng5 and kent37 have described on GitHub

output$mymap = renderLeaflet({...make a map...})
leafletOutput('mymap', height=1000)

Works for me with a leaflet map in R flexdashboard