Add a logo to a leaflet map in a shiny app

Question

I would like to add a logo to a leaflet map in a shiny app.

The addLogo function of the leafem package allows this, when I generate a map outside the shiny environment the function works perfectly, however, when applying the function in shiny it does not work.

I do not know what I can be obviating or if there is another way to do it.

├── app.R
└── www
    └── Logo.png

library(leaflet)
library(shiny)
library(leafem)


ui <- fluidPage(
  
  leafletOutput("map")
  
)

server <- function(input, output, session) {
  
  output$map <- renderLeaflet({    
    
    leaflet() %>%
      addTiles() %>%
      setView(lng = -79.442471,
              lat = 43.6857,
              zoom = 12) %>%
      addLogo("Logo.png",
              src= "local")    
    
    
  })
  
  
}

shinyApp(ui, server)

Answer 1

Use src= "remote" in addLogo. Even though the Shiny app and image is in your local computer, you need to use it as remote. Using local will point to ../graphs/Logo.png instead of only Logo.png (that is the default for files under the www directory).

library(leaflet)
library(shiny)
library(leafem)


ui <- fluidPage(
  
  leafletOutput("map")
  
)

server <- function(input, output, session) {
  
  output$map <- renderLeaflet({    
    
    leaflet() %>%
      addTiles() %>%
      setView(lng = -79.442471,
              lat = 43.6857,
              zoom = 12) %>%
      addLogo("Logo.png",
              src= "remote")    
  })
  
  
}

shinyApp(ui, server)