Jquery 当一个很长的活动增加标题时，满历js每周都会出现.这是一种让标题只出现一次的方法吗

document.addEventListener('DOMContentLoaded', function() {
  var calendarEl = document.getElementById('calendar');
  var ignoreFirstList = [];
  var calendar = new FullCalendar.Calendar(calendarEl, {
    initialView: 'dayGridMonth',
    events: [
          {
              title: 'Testing 1 the quick brown fox jumps over the lazy dog.',
              start: '2024-01-02',
              end: '2024-02-03',
              color: 'green'
          }
      ],
      eventContent: function (arg) {
          var obj = arg.event._def

          if (!ignoreFirstList.includes(obj)) {
              ignoreFirstList.push(obj)
              return true
          }

          // create empty span (but with height > 0)
          var span = document.createElement("span")
          span.textContent = obj.title[0] || "W"
          span.style.opacity = 0
          span.style.userSelect = "none"

          var arrayOfDomNodes = [span]
          return { domNodes: arrayOfDomNodes }
      },
  });
  calendar.render();
});

<script src="https://cdn.jsdelivr.net/npm/@fullcalendar/core@6.1.10/index.global.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@fullcalendar/daygrid@6.1.10/index.global.min.js"></script>
<div id='calendar'></div>