# Event::setExtendedProp

> FullCalendar v6 documentation, for an old release. Web version: https://legacy.fullcalendar.io/v6/Event-setExtendedProp
>
> Latest version (v7): https://fullcalendar.io/docs/Event-setExtendedProp.md

Modifies a single property in an [Event Object's](https://legacy.fullcalendar.io/v6/event-object.md) `extendedProps` hash.

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event.setExtendedProp( *name*, *value* )
</div>