# progressiveEventRendering

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

When to render multiple asynchronous [event sources](https://legacy.fullcalendar.io/v6/event-source-object.md) in an individual or batched manner.

<div class='spec' markdown='1'>
Boolean. `true` or `false` (the default)
</div>

`true` renders each event source as it is received. Will result in more renders.

`false` waits until all event sources have been received and renders them all at once. Results in less renders.