These docs are for an old release.
Info on upgrading to v6
themeSystem
Renders the calendar with a given theme system.
String, default: 'standard'
'standard'- Renders a minimal look & feel, the look in most of the demos. Does not require any CSS files beyond the FullCalendar base files.
'bootstrap5'- Prepares the calendar for a Bootstrap 5 theme. Further instructions »
'bootstrap'- Prepares the calendar for a Bootstrap 4 theme. Further instructions »