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shinyglass

Glass themes for Shiny, built on bslib. Add translucent surfaces, live light/dark switching, and adjustable glass intensity to your app.

Documentation · Theming guide · Release notes

Install

CRAN 0.4.0:

install.packages("shinyglass")

Development builds (GitHub):

# install.packages("remotes")
remotes::install_github("ericrayanderson/shinyglass")

Quick start

library(shiny)
library(shinyglass)

ui <- glass_page(
  title = "Hello, glass",
  persist = TRUE,
  scene = "tahoe",
  sliderInput("n", "Bars", 5, 30, 15),
  plotOutput("plot")
)

server <- function(input, output, session) {
  observe_glass(input, session)
  output$plot <- renderPlot({
    pal <- glass_plot_colors(input = input)
    barplot(seq_len(input$n), col = pal$fill, border = NA, col.axis = pal$ink)
  }, bg = "transparent")
}

shinyApp(ui, server)

glass_page() includes Light / Dark / Auto, the intensity slider, and accent wells. Set persist = TRUE (the default here) to remember those choices.

The intensity slider mirrors iOS 27 Settings → Appearance → Liquid Glass (continuous Ultra Clear → Tinted). Browsers cannot read that OS slider, so the in-app control is the supported way to match the look.

Dense charts and tables can opt into a regular panel with glass_theme(plot_surface = "opaque") while nav and controls stay on glass. The default "clear" look still shows the wallpaper through plot hosts. Use glass_plot_surface_input() to toggle live (ggplot / plotly / gt / DT).

Named wallpaper scenes (tahoe, dusk, mesh, aurora, harbor, grove) and optional wallpaper= photos stay behind a blur + wash so text meets the contrast floor. For chromote, PDF, or screenshots, call glass_flatten() or open the app with ?glass_flatten=1.

Power users can read glass_css_tokens() and override --glass-* variables with glass_theme(tokens = list(blur = "28px")) without forking SCSS.

Live demos

Apps may take a moment to wake up.

Built for Bootstrap 5 and bslib. See compatibility for supported widgets and older layouts.

More: examples · experimental Python package · testing · deployment

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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