How to display a busy indicator in a shiny app?

Question

Note : I have read almost all the discussions on this object in shiny googlegroups and here in SO.

I need an indicator that shows the shiny server is busy. I have tr

Answer 1

I found using fadeIn() as opposed to show() helps mitigate this blinking occurence:

setInterval(function(){
                     if ($('html').attr('class')=='shiny-busy') {
                          setTimeoutConst = setTimeout(function(){
                                $('#loading-page').fadeIn(500);
                             }, delay);
                      } else {
                          clearTimeout(setTimeoutConst );
                          $('#loading-page').hide();
                      }
              },10)