This function is used to define conditions under which certain questions or pages 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 or page ID.
If called with no arguments, it will return NULL and set no conditions.
Value
A list of parsed conditions, where each element contains the condition and the target question or page ID.
Returns NULL if no conditions are provided.
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$fav_fruit == "other" ~ "fav_fruit_other",
# If condition is met, show specific page
input$category == "advanced" ~ "advanced_page"
)
sd_server()
}
# Run the app
shiny::shinyApp(ui = sd_ui(), server = server)
# Clean up
setwd(orig_dir)
}