code: function checkPageViewsCriteria() {
  
      // don't bother if another box is currently open
      if( isAnyBoxVisible() ) {
          return;
      }
  
      boxes.forEach(function(box) {
          if( ! box.mayAutoShow() ) {
              return;
          }
  
          if( box.config.trigger.method === 'pageviews' && pageViews >= box.config.trigger.value ) {
              box.trigger();
          }
      });
  }
docs: check "pageviews" criteria for each box