Infinite scroll in *both* directions (i.e. down and up)

Hey all,

I had to implement a time picker for work that was modeled off of an existing UWP/WPF component. The picker could scroll infinitely (or at least appeared to) in either direction, allowing the user to scroll to find the time they wanted in either direction.

I forked an existing codesandbox example to prove that react-window could do the job - which it did. But one thing I couldn’t achieve was the ability to scroll infinitely in the upward direction. I’m guessing that the list index is bounded to zero and cannot be negative, so I worked around it by setting the starting point far into the “future” thereby setting the index to a high number. See the line:

const numberOfDaysToScrollTo = 1000;

Just wondering if there is another way to solve this, or whether its a feature that you’d consider adding - it may have been proposed before.

But anyway, thanks for the awesome library.

[AliNazariii]

Hi @bvaughn So there isn’t any solution for bidirectional infinite scrolling with virtualized lists? or any trick you suggest?

[bvaughn]

There’s no way to scroll past an offset of 0, unfortunately. So the only way you could implement something like that would be to use a hack similar to what you describe.

Bidirectional infinite scrolling doesn’t sound like a common enough use case (in my opinion) to be something I’d want to invest a ton of effort into to be honest.