Add an observer to display notifications
Recall that an observer is used for side effects, like displaying a plot, table, or text in the browser. By default an observer triggers an action, whenever one of its underlying dependencies change.
In this exercise, you will use an observer to display a notification in the browser, using observe() and showNotification(). As we are triggering an action using an observer, we do NOT need to use a render***() function or assign the results to an output.
Diese Übung ist Teil des Kurses
Building Web Applications with Shiny in R
Anleitung zur Übung
- Add an observer in the server to display a notification
'You have entered the name xxxx', wherexxxxis the name from the input.
Interaktive Übung
Versuche dich an dieser Übung, indem du diesen Beispielcode vervollständigst.
ui <- fluidPage(
textInput('name', 'Enter your name')
)
server <- function(input, output, session) {
# CODE BELOW: Add an observer to display a notification
# 'You have entered the name xxxx' where xxxx is the name
}
shinyApp(ui = ui, server = server)