问我正在使用Vue.js编写完整日历:尝试在其上添加功能，但不起作用

EN

// like 'Mon', for month view
{ weekday: 'short' }

// like 'Mon 9/7', for week views
{ weekday: 'short', month: 'numeric', day: 'numeric', omitCommas: true }

// like 'Monday', for day views
{ weekday: 'long' }

var calendar = new Calendar(calendarEl, {
  views: {
    dayGrid: {
      weekday: 'long'
    }
  }
});

return {
      calendarOptions: {
        views: {
           dayGrid: {
              weekday: 'long'
           }
        },
        plugins: [dayGridPlugin, interactionPlugin, listPlugin, timeGridPlugin],
        initialView: 'dayGridMonth',
        headerToolbar: {
          left: 'today prev,next',
          center: 'title',
          right: 'dayGridMonth,timeGridWeek,timeGridDay,listWeek'
        },
        events: this.eventDates,
        eventDisplay: 'block',
        displayEventTime: false,
        allDaySlot: false
}

>  data() {
>     return {
>       calendarOptions: {
>         plugins: [dayGridPlugin, interactionPlugin, listPlugin, timeGridPlugin],
>         initialView: 'dayGridMonth',
>         headerToolbar: {
>           left: 'today prev,next',
>           center: 'title',
>           right: 'dayGridMonth,timeGridWeek,timeGridDay,listWeek'
>         },
>         events: this.eventDates,
>         eventDisplay: 'block',
>         displayEventTime: false,
>         allDaySlot: false,
>         initialDate: this.startingDate,
>         dayMaxEvents: 2,
>         dayHeaderFormat: {
>           weekday: 'long', month: 'numeric', day: 'numeric', omitCommas: true
>         },
>         expandRows: true,
>         slotEventOverlap: false,
>         buttonText: {
>           today: 'Today',
>           month: 'Month',
>           week: 'Week',
>           day: 'Day'
>         }
>       }
>     };   
}