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Define show conditions for survey questions

Source: R/server.R
sd_show_if.Rd

This function is used to define conditions under which certain questions in the survey should be shown. It takes one or more formulas where the left-hand side is the condition and the right-hand side is the target question ID. If called with no arguments, it will return NULL and set no conditions.

Usage

sd_show_if(...)

Arguments

...

One or more formulas defining show conditions. The left-hand side of each formula should be a condition based on input values, and the right-hand side should be the ID of the question to show if the condition is met.

Value

A list of parsed conditions, where each element contains the condition and the target question ID. Returns NULL if no conditions are provided.

See also

sd_skip_if()

Examples

if (interactive()) {
  library(surveydown)

  # Get path to example survey file
  survey_path <- system.file("examples", "sd_show_if.qmd",
                             package = "surveydown")

  # Copy to a temporary directory
  temp_dir <- tempdir()
  file.copy(survey_path, file.path(temp_dir, "survey.qmd"))
  orig_dir <- getwd()
  setwd(temp_dir)

  # Define a minimal server
  server <- function(input, output, session) {

    sd_show_if(
      # If "Other" is chosen, show the conditional question
      input$fav_fruit == "other" ~ "fav_fruit_other"
    )

    sd_server()
  }

  # Run the app
  shiny::shinyApp(ui = sd_ui(), server = server)

  # Clean up
  setwd(orig_dir)
}