[css-scroll-anchoring] Does gaining an abspos descendant suppress anchoring?

[smfr]

The spec says:

Any change to the computed value of the position property on any element within the scrollable element (or document), such that the element becomes or stops being absolutely positioned.

This is pretty ambiguous; it doesn't say what happens if an abspos child is added (appendChild()) or appears via a change in the display property.

Firefox treats this as a suppression trigger, Chrome does not. Test at https://codepen.io/smfr/pen/zxKxBWe

cc @emilio

I would think that gaining positioned descendants is common enough that having this suppress anchoring on the document would be annoying.