Control The Size Of Popupimage From Leaflet In R Shiny

I am having difficulties to control the size of the image resulting from popupImage (mapview package). Below is a reproducible shiny example where I have a single marker with a pop

Solution 1:

The div-wrapper where the popup is, has a width of 301px as default apparently. You can change it with some css.

library(shiny)
library(leaflet)
library(dplyr)
library(mapview)

img = "https://cdn.sstatic.net/Sites/stackoverflow/img/error-lolcat-problemz.jpg"

csscode = HTML("
.leaflet-popup-content {
  width: 500px !important;
}")

ui <- fluidPage(
  titlePanel("example"),
  tags$head(tags$style(csscode)),
  sidebarLayout(
    sidebarPanel(width=2),# closes sidebar panel

    mainPanel(
      tags$style(type = "text/css", "#map {height: calc(85vh) !important;}"),
      leafletOutput(outputId = "map") 
    ))) 

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

  output$map <- renderLeaflet({
    leaflet() %>% setView(lng= -96.83875, lat = 29.58518, zoom = 9)%>%
      addProviderTiles("Stamen.Toner") %>%
      addMarkers(lng= -96.83875, lat = 29.58518,popup=popupImage(img,embed=TRUE,width=500))
  })}  

# Run app ----
shinyApp(ui, server)