# cacheParam

> FullCalendar v1 documentation, for an old release. Web version: https://legacy.fullcalendar.io/v1/cacheParam
>
> Latest version (v7): https://fullcalendar.io/docs/events-json-feed.md

A GET parameter of this name will be inserted into each JSON feed's URL to prevent caching.

<div class='removed-notice'>
This option was removed in version 1.5.
Use the <a href='https://legacy.fullcalendar.io/v1/events-json-feed.md#caching'>JSON event source</a> jQuery.ajax cache parameter
to enable/disable caching.
</div>

<div class='spec' markdown='1'>
String, *default*: `'_'`
</div>

The value will be the current millisecond time.