How can I load all events on calendar using Ajax?

Question

I want to load all events on FullCalendar using AJAX when I clicked next-previous-button in agenda-views.

I guess, when will click on

Answer 1

There is a built in option avaliable

var calendar = new FullCalendar.Calendar(calendarEl, {
    events: '/myfeed.php'
})

more details https://fullcalendar.io/docs/events-json-feed