好吧，我猜100%的高度你的意思是“适合屏幕/窗口”？

jscode <- '
$(document).on("shiny:connected", function(e) {
var jsHeight = window.innerHeight;
Shiny.onInputChange("GetScreenHeight",jsHeight);
});
'

library(shiny)
library(leaflet)

r_colors <- rgb(t(col2rgb(colors()) / 255))
names(r_colors) <- colors()

ui <- fluidPage(
  p(),
  tags$script(jscode),
  uiOutput("leafl"),
  actionButton("recalc", "New points")
)

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

  points <- eventReactive(input$recalc, {
    cbind(rnorm(40) * 2 + 13, rnorm(40) + 48)
  }, ignoreNULL = FALSE)

  output$mymap <- renderLeaflet({
    leaflet() %>%
      addProviderTiles("Stamen.TonerLite",
                       options = providerTileOptions(noWrap = TRUE)
      ) %>%
      addMarkers(data = points())
  })

  output$leafl <- renderUI({
    if(!is.null(input$GetScreenHeight)){
      width  <- session$clientData$output_image1_width
      print(session$clientData)
      height <- session$clientData$output_image1_height
      leafletOutput("mymap", width = "100%", height = input$GetScreenHeight)
    }
  })
}

shinyApp(ui, server)

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