updateGlassTabBadge: Update the badge count on a glass tab

In glasstabs: Animated Glass-Style Tabs and Select Inputs for 'Shiny'

Update the badge count on a glass tab

Description

Adds or updates a small numeric badge on a tab button - useful for surfacing counts such as unread items, pending rows, or notification totals. Set count to 0 or NA to hide the badge.

Usage

updateGlassTabBadge(session, id, value, count)

Arguments

session	Shiny session object.
id	Module id matching the id passed to glassTabsUI().
value	Value of the tab to update.
count	Integer count to display. Values above 99 are shown as "99+". 0 or NA hides the badge.

Value

Called for its side effect; returns NULL invisibly.

See Also

Other glass tabs: appendGlassTab(), disableGlassTab(), glassTabCondition(), glassTabPanel(), glassTabsOutput(), glassTabsServer(), glassTabsUI(), renderGlassTabs(), showGlassTab(), updateGlassTabsUI()

Examples

if (interactive()) {
  library(shiny)
  ui <- fluidPage(
    useGlassTabs(),
    glassTabsUI(
      "tabs",
      glassTabPanel("inbox",  "Inbox",  p("Messages here"), selected = TRUE),
      glassTabPanel("sent",   "Sent",   p("Sent items")),
      glassTabPanel("drafts", "Drafts", p("Draft items"))
    ),
    actionButton("refresh", "Refresh counts")
  )
  server <- function(input, output, session) {
    observeEvent(input$refresh, {
      updateGlassTabBadge(session, "tabs", "inbox",  count = sample(1:20, 1))
      updateGlassTabBadge(session, "tabs", "drafts", count = sample(0:5, 1))
    })
  }
  shinyApp(ui, server)
}

glasstabs documentation built on Sept. 11, 2026, 5:08 p.m.