Reactives: An Example

server <- function(input, output) {
    output$distPlot <- renderPlot({
        hist(rnorm(input$obs))
    })
}

In this example, input$obs is a reactive source, and output$distPlot is a reactive endpoint.

• Clicking or typing into input widgets will set some sort of value, or reactive source.

• A reactive endpoint is an object that appears in the app, like a plot, text, or values. Reactive endpoints re-execute when their reactive inputs change.