README.md
In basf/reactflush: Shiny Code Reactivity Visualizer

reactflush

Shiny is an R package from RStudio that makes it incredibly easy to build interactive web applications with R using a reactive programming model. The complexity of the reactive elements within a shiny application can quickly become complicated and difficult to keep an overview of the sources and endpoints of your elements. reactflush parses your code, analyses the sources and endpoints for each element and provides a visual overview of how all the reactive elements interact wiht one another.

This package aims to be a complementary tool for reactlog which provides a visual debugger for shiny reactivity. The key difference is that reactflush gives you an overview of your complete app based on your code instead of logging the reactive activity while using the app. This ensures a complete overview of all reactive elements in your app. This will help in identifying which elements are reactive bottlenecks or how changing one element will affect other reactive elements.

visualise the reactivity network of your shiny app
focus one reactivity network around one single element in your app
capable of identifying and processing source statements within your code
identify all common elements: input, reactive, reactiveValues, reactiveVal, eventReactive, callModule, observe, observeEvent, render*

nodes

# install.packages("devtools")
devtools::install_github("basf/reactflush")

# select directory of shiny app 
dir <- fs::path(system.file("examples", package="shiny"), "07_widgets")
# create reactflush overview
reactflush(dir)

nodes

# select directory of shiny app 
dir <- fs::path(system.file("examples", package="shiny"), "07_widgets")
# select element to focus on
element <- "output$view"
# create reactflush overview
reactflush(dir, focus = element)

nodes