Tooltip error

HTML

<link rel="stylesheet" href="https://fullcalendar.io/js/fullcalendar-3.0.0/fullcalendar.css">
<script data-require="[email protected]" data-semver="3.1.0" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.0/jquery.js"></script>
<script data-require="[email protected]" data-semver="2.14.1" src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.14.1/moment.js"></script>
<script data-require="[email protected]" data-semver="3.0.0" src="https://cdnjs.cloudflare.com/ajax/libs/fullcalendar/3.0.0/fullcalendar.js"></script>
<script>
  var events = [
				{
					title: 'All Day Event',
					start: '2016-12-01'
				},
				{
					title: 'Long Event',
					start: '2016-12-07',
					end: '2016-12-10'
				},
				{
					id: 999,
					title: 'Repeating Event',
					start: '2016-12-09T16:00:00'
				},
				{
					id: 999,
					title: 'Repeating Event',
					start: '2016-12-16T16:00:00'
				},
				{
					title: 'Conference',
					start: '2016-12-11',
					end: '2016-12-13'
				},
				{
					title: 'Meeting',
					start: '2016-12-12T10:30:00',
					end: '2016-12-12T12:30:00'
				},
				{
					title: 'Lunch',
					start: '2016-12-12T12:00:00'
				},
				{
					title: 'Meeting',
					start: '2016-12-12T14:30:00'
				},
				{
					title: 'Happy Hour',
					start: '2016-12-12T17:30:00'
				},
				{
					title: 'Dinner',
					start: '2016-12-12T20:00:00'
				},
				{
					title: 'Birthday Party',
					start: '2016-12-13T07:00:00'
				},
				{
					title: 'Click for Google',
					url: 'http://google.com/',
					start: '2016-12-28'
				}
			];
  </script>
  

	<div id='calendar'></div>

JavaScript

$(document).ready(function() {
		$('#calendar').fullCalendar({
			header: {
				left: '',
				center: 'title',
				right: ''
			},
      minTime: '07:00:00',
      maxTime: '18:30:00',
			businessHours: true,
      allDaySlot: false,
      defaultView: 'month',
			defaultDate: '2016-12-12',
			navLinks: true, // can click day/week names to navigate views
			editable: true,
			eventLimit: true, // allow "more" link when too many events
			viewRender: activateToolTip,
      events: events
		});
    
    function activateToolTip(view) {
        if (view.name == 'agendaWeek') {
            var tip = $('<span id="tip"></span>');
            $timeSlot = $('#calendar').find('.fc-body');
        
            $timeSlot.on('mouseenter', '.fc-slats tr td', function(e) {
                var time = $(e.target.parentNode).attr('data-time');
                if (time) { // "07:45:00"
                    time = time.split(':').slice(0, -1).join(':'); // "07:45"
                    tip.html(time).appendTo('body').show();
                }
            });
            $timeSlot.on('mouseleave', '.fc-slats tr td', function() {
                tip.hide().remove();
            });
            $timeSlot.on('mousemove', '.fc-slats tr td', function(e) {
                tip.css({
                    'top': (e.pageY - 35) + 'px',
                    'left': (e.pageX + 10) + 'px',
                    'position': 'absolute',
                    'z-index': '2',
                    'font-size': '.9em',
                    'font-weight': 'bold',
                    'padding': '5px 10px',
                    'border-radius': '3px',
                    'box-shadow': '0 1px 2px grey',
                    'background': 'whitesmoke',
                });
            });
         }
    }
    
});