title: R Action Button and eventReactive not working
body: <p>This is a simple problem, but I am not why exactly my simple button press is not displaying text.   </p>
  
  <p>I have an <code>actionButton</code> with id "go". When a user presses a button, I just simply want to display "Button Pressed" in my <code>textOutput</code> box. Also I want to display a message in my <code>R</code> Console window.   </p>
  
  <pre><code>library(shiny)
  ui &lt;- fluidPage(
      actionButton("go", "Go"),
      verbatimTextOutput("text", placeholder = TRUE)
  )
  
  server &lt;- function(input, output) {
    displayText &lt;- eventReactive(input$go, {
      output$text &lt;- renderText("Button Pressed")
    })
  }
  
  shinyApp(ui, server)
  </code></pre>
  
  <p>Right now, my GO button is displayed and right underneath I see the <code>TextOutput</code> box which has nothing in it (as expected). However, when I press the button, nothing happens. I am trying to display "Button Pressed".</p>