Javascript – Need help making an event do something on click and other event do nothing on click

<FullCalendar
                    allDaySlot={true}
                    eventClick={(info) => this.openReservationInfoModal(info.event)}
                    events={[...milestones.map(milestone => ({
                        id: milestone.id,
                        title: milestone.description,
                        start: milestone.expectedDate,
                        allDay: true
                    })), ...this.state.reservations]}

what this code do is show in the calendar the milestones and the room reservations but my problem is that in the calendar when I click the reserved room it shows who reserved the room and the reason why it was reserved, only because of this code: eventClick={(info) => this.openReservationInfoModal(info.event)} and thats what its suposed to do ; but when I click the milestone on the calendar it shows the same thing it shows when I click the reserved room, What I want is to change the code so that when I click the milestone on the calendar it shows nothing as if it was eventClick={null} but when I click the reserved room it still shows who reserved the room and the reason why it was reserved, basically I want to separate the reservations eventClick from the milestones eventClick.

I asked chatgpt and it did this:

<FullCalendar
  allDaySlot={true}
  eventClick={(info) => this.handleEventClick(info.event)}
  events={[...milestones.map(milestone => ({
    id: milestone.id,
    title: milestone.description,
    start: milestone.expectedDate,
    allDay: true,
    type: 'milestone' // Add a type property to differentiate milestones
  })), ...this.state.reservations]}
/>

// Event click handler
handleEventClick(event) {
  if (event.extendedProps && event.extendedProps.type === 'milestone') {
    // Handle click for milestones (do nothing or show a different modal)
    // For example, you can add a specific action or leave it empty
    console.log('Milestone clicked');
  } else {
    // Handle click for reservations
    this.openReservationInfoModal(event);
  }
}

// Method to open reservation info modal
openReservationInfoModal(reservation) {
  // Add your logic to show reservation information
  console.log('Reservation clicked', reservation);
  // Display the modal with reservation information
}

but it still didnt work