code: public function onOutput(Event $event)
      {
          $this->channelName = $this->debug->getCfg('channel');
          $this->data = $this->debug->getData();
          $errorStats = $this->debug->internal->errorStats();
          $errorStr = '';
          if ($errorStats['inConsole']) {
              $errorStr = 'Errors: ';
              foreach ($errorStats['counts'] as $category => $vals) {
                  $errorStr .= $vals['inConsole'].' '.$category.', ';
              }
              $errorStr = \substr($errorStr, 0, -2);
          }
          $str = '';
          $str .= '<script type="text/javascript">'."\n";
          $str .= $this->processLogEntryWEvent('groupCollapsed', array(
              'PHP',
              (isset($_SERVER['REQUEST_METHOD']) && isset($_SERVER['REQUEST_URI'])
                  ? $_SERVER['REQUEST_METHOD'].' '.$_SERVER['REQUEST_URI']
                  : ''),
              $errorStr,
          ));
          $str .= $this->processAlerts();
          $str .= $this->processSummary();
          $str .= $this->processLog();
          $str .= $this->processLogEntryWEvent('groupEnd');
          $str .= '</script>'."\n";
          $this->data = array();
          $event['return'] .= $str;
      }
docs: output the log as javascript
  which outputs the log to the console
  
  @param Event $event event object
  
  @return string|void