FullCalendar event background color

1. 在 event 指定 backgroundColor

backgroundColor: '#ED1317'

php - change the background color of the events in FullCalendar - Stack Overflow


2. 使用 CSS 修改

$(this).css('border-color', 'red');

eventClick - Documentation | FullCalendar

fullcalendar rerender new calendar

function rerender_calendar(id, url)
{
    // clear all event
    $('#' + id).fullCalendar('removeEvents');

    // render new event
    $('#' + id).fullCalendar('addEventSource', url);
}

References :
javascript - rerendering events in fullCalendar after Ajax database update - Stack Overflow
removeEvents - Documentation | FullCalendar