System details
Browser Version: Chrome, Version 103.0.5060.114 (Official Build) (64-bit)
Output of sessionInfo():
R version 4.1.0 (2021-05-18)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 20.04.2 LTS
Matrix products: default
BLAS: /usr/lib/x86_64-linux-gnu/openblas-pthread/libblas.so.3
LAPACK: /usr/lib/x86_64-linux-gnu/openblas-pthread/liblapack.so.3
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 LC_MONETARY=en_US.UTF-8
[6] LC_MESSAGES=en_US.UTF-8 LC_PAPER=en_US.UTF-8 LC_NAME=C LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] shinyGizmo_0.2.2 shiny_1.7.1
loaded via a namespace (and not attached):
[1] Rcpp_1.0.7 knitr_1.36 magrittr_2.0.1 xtable_1.8-4 R6_2.5.1 rlang_1.0.2 fastmap_1.1.0 shinyWidgets_0.7.0
[9] tools_4.1.0 xfun_0.31 cli_3.3.0 jquerylib_0.1.4 htmltools_0.5.2 ellipsis_0.3.2 yaml_2.2.1 digest_0.6.28
[17] lifecycle_1.0.1 purrr_0.3.4 later_1.3.0 sass_0.4.0 promises_1.2.0.1 cachem_1.0.6 glue_1.6.2 evaluate_0.14
[25] mime_0.12 rmarkdown_2.14 compiler_4.1.0 bslib_0.3.1 jsonlite_1.7.2 httpuv_1.6.3
Example application or steps to reproduce the problem
library(shiny)
ui <- fluidPage(
tags$head(
tags$script("$(document).on('shiny:conditional', function(event) {console.log(event);})")
),
actionButton("val", "Value"),
textOutput("out")
)
server <- function(input, output, session) {
output$out <- renderText({
input$val
})
}
shinyApp(ui, server)Describe the problem in detail
Looking at the browser console we may realize the event is triggered multiple times.
This happens due to the usage of inputConditionals in multiple places (e.g. while running sendInput or dispatchMessage).
A possible solution could be to trigger the function only when the application flush cycle is finished.
System details
Browser Version: Chrome, Version 103.0.5060.114 (Official Build) (64-bit)
Output of
sessionInfo():Example application or steps to reproduce the problem
Describe the problem in detail
Looking at the browser console we may realize the event is triggered multiple times.
This happens due to the usage of
inputConditionalsin multiple places (e.g. while runningsendInputordispatchMessage).A possible solution could be to trigger the function only when the application flush cycle is finished.