title: Import excel, progress bar during my logic
body: <p>I'm using maatwebsite/excel: ~2.1.0, to import and excel to my aplication.
  I save the file in my server, after that I </p>
  
  <pre><code>Excel::filter('chunk')
      -&gt;selectSheetsByIndex(0)
      -&gt;load($target_file)
      -&gt;chunk(100, function($rows) {               
          foreach($rows as $row ){
              //al my logic
          }
      }
  </code></pre>
  
  <p>I would like to print a progress bar in the browser during this logic. 
  I'm don't want to use ajax().</p>