title: Usage of eventMouseEnter in V4 of fullcalendar
body: <p>I am using V4 of fullcalnedar and I want to display a popup window when the mouse tip hover an event displayed in the calendar and I am using the following code lines. console.log() line appears correctly. But popup doesn't occur. Any idea about this issue?</p>
  
  <pre><code>eventMouseEnter: function (info) {
      console.log("-------hover--------");
      tooltip = '&lt;div class="tooltiptopicevent" style="width:auto;height:auto;background:#feb811;position:absolute;z-index:10001;padding:10px 10px 10px 10px ;  line-height: 200%;"&gt;' + 'title: ' + ': ' + info.event.title + '&lt;/br&gt;' + 'start: ' + ': ' + info.event.start + '&lt;/div&gt;';
      console.log("-------"+tooltip);
  
      $("body").append(tooltip);
      $(this).mouseover(function (e) {
          $(this).css('z-index', 10000);
          $('.tooltiptopicevent').fadeIn('500');
          $('.tooltiptopicevent').fadeTo('10', 1.9);
      }).mousemove(function (e) {
          $('.tooltiptopicevent').css('top', e.pageY + 10);
          $('.tooltiptopicevent').css('left', e.pageX + 20);
      });
  },
  eventMouseLeave: function (data, event, view) {
      $(this).css('z-index', 8);
  
      $('.tooltiptopicevent').remove();
  }
  </code></pre>
  
  <p><strong>UPDATED</strong></p>
  
  <p>With the above code snippet I can have the pop - up. But its not very clearly observed. The screen gets blinked very speedily so that its really hard to see the screen. Do you have any idea?</p>
  
  <p><strong>UPDATED</strong></p>
  
  <pre><code>&lt;script&gt;
  $scope.displayCalendar = function()
  {
   var calendarEl = document.getElementById('calendar');
  
    var calendar = new FullCalendar.Calendar(calendarEl, {
      plugins: [ 'dayGrid' ],
      defaultView: 'dayGridMonth',
      defaultDate: '2019-06-12',
      eventRender: function(info) {
        var tooltip = new Tooltip(info.el, {
          title: info.event.extendedProps.description,
          placement: 'top',
          trigger: 'hover',
          container: 'body'
        });
      }
  events: [
        {
          title: 'All Day Event',
          description: 'description for All Day Event',
          start: '2019-06-01'
        },
        {
          title: 'Long Event',
          description: 'description for Long Event',
          start: '2019-06-07',
          end: '2019-06-10'
        }
         ]
  });
  calendar.render();
  
  }
  </code></pre>
  
  <p></p>