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 should servers as 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*
graph LR; n1(source); style n1 color: white, fill:none, fill-opacity:0.4, stroke:none, stroke-width:2px; n2(endpoint); style n2 fill:none, fill-opacity:0.4, stroke:none, stroke-width:2px; n3(source); style n3 color: white, fill:none, fill-opacity:0.4, stroke:none, stroke-width:2px; n4(endpoint); style n4 fill:none, fill-opacity:0.4, stroke:none, stroke-width:2px; n5(source); style n5 color: white, fill:none, fill-opacity:0.4, stroke:none, stroke-width:2px; n6(endpoint); style n6 fill:none, fill-opacity:0.4, stroke:none, stroke-width:2px; n1-->|connected|n2; linkStyle 0 stroke:black, stroke-width:1px, fill:none, stroke-dasharray:none; n3-->|isolated|n4; linkStyle 1 stroke:#999999, stroke-width:1px, fill:none, stroke-dasharray:10; n6-->|side effect|n5; linkStyle 2 stroke:black, stroke-width:1px, fill:none, stroke-dasharray:2; # install.packages("devtools") devtools::install_github("svdwoude/reactflush")# select directory of shiny app dir <- fs::path(system.file("examples", package="shiny"), "07_widgets") # create reactflush overview reactflush(dir)
# 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)
