jQuery fullCalendar displayed undefined on title
问题 i'm using jQuery fullcalendar on a ReactJs component. i have a <div id="calendar"></div> on the render method and on componentDidUpdate , i updated the calendar with the following codes: $('#calendar').fullCalendar({ header: { left: 'prev,next today', center: 'title', right: 'month,agendaWeek,agendaDay' }, events: _this.state.events, defaultView:'month', displayEventTime: false, editable: false, droppable: false, durationEditable: false }); and it shows "undefined" character on title. where