How to update a reactiveValues entry at startup

[sbo]

I want to set the value of a reactiveValues at startup of the application, but I get the following error:

Error : Can't access reactive value 'log_info' outside of reactive consumer.
Do you need to wrap inside reactive() or observer()?

The problem is that I have nothing to observe or to reactive() to. It just starts up and I want to push some data into a reactiveValues at startup.

[ginberg]

It's no problem to initialize a reactiveValues object at startup. To access a value you need a reactive context, unless you use isolate. See below and also the help of reactiveValues (?reactiveValues)

library(shiny)

ui <- fluidPage(
  textOutput("myvalue")
)

server <- function(input, output) {
  values <- reactiveValues(a = 1)
  
  output$myvalue <- renderText({
    paste("My value is: ", values$a)
  })
  
  cat(paste("My value is: ", isolate(values$a)))
}
shinyApp(ui, server)

[sbo]

I don't have any output$myvalue to pull the operation. I just want it to happen it regardless. In other environments it's called a lifetime event.

[ginberg]

I only added the output$myvalue to show the initialized value. The initialization itself is done in the first line of the server