[css-position] Is the "nearest scrollport" in DOM hierarchy or in containing block hierarchy?

[wangxianzhu]

https://drafts.csswg.org/css-overflow-3/#nearest-scrollport says:
For convenience, a box’s nearest scrollport is the scrollport of its nearest scroll container ancestor.

It doesn't say the "ancestor" is in DOM hierarchy or in containing block hierarchy.

For the following case:

<div id="outer-scroller" style="overflow: scroll; position: relative">
  <div id="inner-scroller" style="overflow: scroll">
    <div style="position: absolute">
      <div style="position: sticky">

Is the nearest scrollport of the stickily positioned element "inner-scroller" or "outer-scroller"?

"outer-scroller" looks to make more sense to me, but I think the spec needs clarification.

[Loirooriol]

This is basically #3185

[wangxianzhu]

Closing because this is a duplicate of #3185.

[thecalamiity]

@wangxianzhu Well you forgot to actually close 😅

[wangxianzhu]

Thanks for the heads-up!

[tabatkins]

You still didn't close it, but I got you.