bs_global_theme: Global theming

In bslib: Custom 'Bootstrap' 'Sass' Themes for 'shiny' and 'rmarkdown'

Global theming

Description

bs_global_theme() creates and sets the global Bootstrap Sass theme. This theme is typically found by bs_theme_dependencies() in the app or document where the global theme is being used. You can obtain the current global theme with bs_global_get() or directly set the global theme with bs_global_set().

Usage

bs_global_theme(
  version = version_default(),
  preset = NULL,
  bg = NULL,
  fg = NULL,
  primary = NULL,
  secondary = NULL,
  success = NULL,
  info = NULL,
  warning = NULL,
  danger = NULL,
  base_font = NULL,
  code_font = NULL,
  heading_font = NULL,
  ...,
  bootswatch = NULL
)

bs_global_set(theme = bs_theme())

bs_global_get()

bs_global_clear()

bs_global_add_variables(
  ...,
  .where = "defaults",
  .default_flag = identical(.where, "defaults")
)

bs_global_add_rules(...)

bs_global_bundle(...)

bs_global_theme_update(
  ...,
  preset = NULL,
  bg = NULL,
  fg = NULL,
  primary = NULL,
  secondary = NULL,
  success = NULL,
  info = NULL,
  warning = NULL,
  danger = NULL,
  base_font = NULL,
  code_font = NULL,
  heading_font = NULL,
  bootswatch = NULL
)

Arguments

version	The major version of Bootstrap to use (see versions() for possible values). Defaults to the currently recommended version for new projects (currently Bootstrap 5).
preset	The name of a theme preset, either a built-in theme provided by bslib or a Bootswatch theme (see builtin_themes() and bootswatch_themes() for possible values). This argument takes precedence over the bootswatch argument and only one preset or bootswatch can be provided. When no bootswatch theme is specified, and version is 5 or higher, preset defaults to "shiny". To remove the "shiny" preset, provide a value of "bootstrap" (this value will also work in bs_theme_update() to remove a preset or bootswatch theme).
bg	A color string for the background.
fg	A color string for the foreground.
primary	A color to be used for hyperlinks, to indicate primary/default actions, and to show active selection state in some Bootstrap components. Generally a bold, saturated color that contrasts with the theme's base colors.
secondary	A color for components and messages that don't need to stand out. (Not supported in Bootstrap 3.)
success	A color for messages that indicate an operation has succeeded. Typically green.
info	A color for messages that are informative but not critical. Typically a shade of blue-green.
warning	A color for warning messages. Typically yellow.
danger	A color for errors. Typically red.
base_font	The default typeface.
code_font	The typeface to be used for code. Be sure this is monospace!
heading_font	The typeface to be used for heading elements.
...	arguments passed along to bs_add_variables().
bootswatch	The name of a bootswatch theme (see bootswatch_themes() for possible values). When provided to bs_theme_update(), any previous Bootswatch theme is first removed before the new one is applied (use bootswatch = "bootstrap" to effectively remove the Bootswatch theme).
theme	A bs_theme() object.
.where	Whether to place the variable definitions before other Sass "defaults", after other Sass "declarations", or after other Sass "rules".
.default_flag	Whether or not to add a !default flag (if missing) to variable expressions. It's recommended to keep this as TRUE when .where = "defaults".

Value

Functions that modify the global theme (e.g., bs_global_set()) invisibly return the previously set theme. bs_global_get() returns the current global theme.

See Also

Other Bootstrap theme functions: bs_add_variables(), bs_current_theme(), bs_dependency(), bs_remove(), bs_theme(), bs_theme_dependencies(), bs_theme_preview()

Examples

# Remember the global state now (so we can restore later)
theme <- bs_global_get()

# Use Bootstrap 3 (globally) with some theme customization
bs_global_theme(3, bg = "#444", fg = "#e4e4e4", primary = "#e39777")
if (rlang::is_interactive()) {
  bs_theme_preview(with_themer = FALSE)
}

# If no global theme is active, bs_global_get() returns NULL
bs_global_clear()
bs_global_get()

# Restore the original state
bs_global_set(theme)

bslib documentation built on April 3, 2025, 10:15 p.m.