Scroller render doesn't account for the height of leading or trailing slots

[danatcofo]

Not sure how this is doing it under the covers but heres a video showing what I'm talking about.

Inside the #before slot we have elements that get toggle to be sticky or relative. The sticky version works fine visually where the elements disappear and are reused smoothly. The relative version treats the area as if it where sticky... i.e preserving the #before slot sizing internally.

Is there something I can do to force or tell the scoller to use the area in the #before slot as well such that it doesn't have the blank area?

[danatcofo]

I can reproduce this actually on the demo here https://akryum.github.io/vue-virtual-scroller/#/dynamic by setting the hight of the leading notice element to 500px in the developer tools.

So it appears that the logic doesn't account for leading height of the #before slot

[danatcofo]

Looks like a work-around for this bug is to set the :buffer="" to the height of the #before slot contents.

[semiaddict]

Seems like a duplicate of #510