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https://github.com/rstudio/shiny

Easy interactive web applications with R
https://github.com/rstudio/shiny

r reactive rstudio shiny web-app web-development

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Easy interactive web applications with R

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# shiny 



[![CRAN](https://www.r-pkg.org/badges/version/shiny)](https://CRAN.R-project.org/package=shiny)

[![R build status](https://github.com/rstudio/shiny/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/rstudio/shiny/actions)

[![RStudio community](https://img.shields.io/badge/community-shiny-blue?style=social&logo=rstudio&logoColor=75AADB)](https://community.rstudio.com/new-topic?category=shiny&tags=shiny)



Easily build rich and productive interactive web apps in R — no HTML/CSS/JavaScript required.



## Features



* An intuitive and extensible [reactive programming](https://en.wikipedia.org/wiki/Reactive_programming) model which makes it easy to transform existing R code into a "live app" where outputs automatically react to new user input.

  * Compared to event-based programming, reactivity allows Shiny to do the minimum amount of work when input(s) change, and allows humans to more easily reason about complex [MVC logic](https://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller).

* A prebuilt set of highly sophisticated, customizable, and easy-to-use widgets (e.g., plots, tables, sliders, dropdowns, date pickers, and more).

* An attractive default look based on [Bootstrap](https://getbootstrap.com/) which can also be easily customized with the [bslib](https://github.com/rstudio/bslib) package or avoided entirely with more direct R bindings to HTML/CSS/JavaScript.

* Seamless integration with [R Markdown](https://shiny.rstudio.com/articles/interactive-docs.html), making it easy to embed numerous applications natively within a larger dynamic document.

* Tools for improving and monitoring performance, including native support for [async programming](https://posit.co/blog/shiny-1-1-0/), [caching](https://talks.cpsievert.me/20201117), [load testing](https://rstudio.github.io/shinyloadtest/), and more.

* [Modules](https://shiny.rstudio.com/articles/modules.html): a framework for reducing code duplication and complexity.

* An ability to [bookmark application state](https://shiny.rstudio.com/articles/bookmarking-state.html) and/or [generate code to reproduce output(s)](https://github.com/rstudio/shinymeta).

* A rich ecosystem of extension packages for more [custom widgets](http://www.htmlwidgets.org/), [input validation](https://github.com/rstudio/shinyvalidate), [unit testing](https://github.com/rstudio/shinytest), and more.



## Installation



To install the stable version from CRAN:



```r

install.packages("shiny")

```



## Getting Started



Once installed, load the library and run an example:



```r

library(shiny)

# Launches an app, with the app's source code included

runExample("06_tabsets")

# Lists more prepackaged examples

runExample()

```



For more examples and inspiration, check out the [Shiny User Gallery](https://shiny.rstudio.com/gallery/).



For help with learning fundamental Shiny programming concepts, check out the [Mastering Shiny](https://mastering-shiny.org/) book and the [Shiny Tutorial](https://shiny.rstudio.com/tutorial/). The former is currently more up-to-date with modern Shiny features, whereas the latter takes a deeper, more visual, dive into fundamental concepts.



## Join the conversation



If you want to chat about Shiny, meet other developers, or help us decide what to work on next, [join us on Discord](https://discord.com/invite/yMGCamUMnS).



## Getting Help



To ask a question about Shiny, please use the [RStudio Community website](https://community.rstudio.com/new-topic?category=shiny&tags=shiny).



For bug reports, please use the [issue tracker](https://github.com/rstudio/shiny/issues) and also keep in mind that by [writing a good bug report](https://github.com/rstudio/shiny/wiki/Writing-Good-Bug-Reports), you're more likely to get help with your problem.



## Contributing



We welcome contributions to the **shiny** package. Please see our [CONTRIBUTING.md](https://github.com/rstudio/shiny/blob/main/.github/CONTRIBUTING.md) file for detailed guidelines of how to contribute.



## License



The shiny package as a whole is licensed under the GPLv3. See the [LICENSE](LICENSE) file for more details.



## R version support



Shiny is supported on the latest release version of R, as well as the previous four minor release versions of R. For example, if the latest release R version is 4.1, then that version is supported, as well as 4.0, 3.6, 3.5, and 3.4.