countdown makes it easy to drop in a simple countdown timer in slides and HTML documents written in Quarto or R Markdown.

library(countdown)
countdown(minutes = 0, seconds = 15)

Check out countdown in its native environment in the countdown presentation.

Installation

quarto add gadenbuie/countdown/quarto

This will install the extension under the _extensions subdirectory. If you’re using version control, you will want to check in this directory.

To use the extension, use the {{< countdown >}} shortcode. For example, a countdown clock can be created by writing anywhere:

{{< countdown "5:30" >}}

You can install countdown from CRAN

install.packages("countdown")

or you can install the development version of countdown from gadenbuie.r-universe.dev

options(repos = c(
  gadenbuie = 'https://gadenbuie.r-universe.dev',
  getOption("repos")
))
install.packages('countdown')

or from GitHub

# install.packages("remotes")
remotes::install_github("gadenbuie/countdown", subdir = "r")

Learn more in the R countdown README.