anchor.diff:  
               div.col-sm-6.col-md-2
                   div.thumbnail
  -                    img(data-src='holder.js/128x128/gray/text:Upload image')
  +                    img(id='selected-image',data-src='holder.js/128x128/gray/text:Upload image')
                       div.caption                            
                           button.btn.btn-primary(onclick="$('#file-selector').click();") Choose image 
   
  
positive.code:             });
          }
  
      div.container
          h1 Image analysis example
  
  
negative.code:         |   $('#processingError').hide(0);
          |   $('#resultsPanel').hide(0);
          |   document.getElementById('file-selector').addEventListener('change', function(e) { 
          |       
          |       extractDominantColorsFromFile($('#file-selector').val());
          |   });
          | });
  