在 R Shiny 的图标上添加 hover 消息

Question

I would like to add a hover message which will appear when I move my mouse above the "i" information icon.

info icon

I added the icon with:

numericInput("fixed_ratio", 
             label = tags$div(HTML('Fixed ratio <i class="fas fa-info-circle" 
                                       style = "color:#0072B2;"></i>')), 
             value = 1)

Within the "HTML", I tried to add "title" to work as the hover message, but it didn't work out.

Is there any way to add the message? Thanks!!

Answer 1

This works for me:

library(shiny)

ui <- fluidPage(
  numericInput(
    "fixed_ratio", 
    label = tags$span(
      "Fixed ratio", 
      tags$i(
        class = "glyphicon glyphicon-info-sign", 
        style = "color:#0072B2;",
        title = "message"
      )
    ), 
    value = 1
  )  
)

shinyApp(ui, function(input, output){})