I've followed a documentation and uploaded a project here.
There are no errors, but events are not displayed. Here's some code:
<BigCalendar
events={events}
startAccessor='startDate'
endAccessor='endDate'
defaultDate={new Date(2017, 11, 1)}
views={allViews}
defaultView='day'
titleAccessor='tttttttt'
components={{
event: Event,
agenda: {
event: EventAgenda
}
}}
/>
Cannot understand what is the problem. According to this answer I added some style, but the result is the same. A page with the documentation of React Big Calendar is here.
Make sure your event dates match up to the accessors.
When you define a 'startAccessor' and 'endAccessor' it will look at those for the event dates. In the sample data for events big-calendar supplies 'end' and 'start' for the dates.
The default states for start/end Accessors is 'start' and 'end' so if you change to 'startDate' and 'endDate' your event dates need to match that.