These docs are for an old release.
Info on upgrading to v7
dragScrollEls
Determines which elements in the DOM the dragScroll setting will auto-scroll.
NOT YET EXPOSED
a CSS selector
-or-
an array of CSS selectors and elements
default: [ window, '.fc-scroller' ]
When auto-scrolling is happening, it is too expensive to query the DOM for every element that might have scrollbars. Therefore, this setting determines what elements will be considered.