Bug 🐞: min + max props breaks layout.

[karltaylor]

Do you want to request a feature or report a bug?

Bug

What's the current behavior?

Passing min and max props breaks the position of events.

https://codesandbox.io/s/14jq64y553

What's the expected behavior?

Events to be in the correct position.

[dmitrykrylov]

I created a pull request to fix this issue

[janb87]

You have to deduct one minute (eg 17:59 if you want 18:00).

This piece of code is causing it (but I think it is by design, 0:00 -> 23:59).
https://github.com/intljusticemission/react-big-calendar/blob/master/src/utils/TimeSlots.js#L14
1 minute is added to totalMin var. A little bit further the numGroups is calculated and the number is rounded to the top (Math.ceil). This will cause numGroups to be incorrect (1 too much).