Calendar::changeView

Immediately switches to a different view.

viewName must be the name of one of the available views (a string).

calendar.changeView('timeGridDay');

If you'd like to navigate to a new date while simultaneously switching to a new view, you can specify a date parameter:

calendar.changeView('timeGridDay', '2017-06-01');

If you are using Custom View, you can change the visibleRange in the same way:

calendar.changeView('timeGrid', {
  start: '2017-06-01',
  end: '2017-06-05'
});

This date/visibleRange parameter was added in version 3.3.0.