@youknowriad should know the reason why it wasn't part of the public API. I'm not quite sure why it is part of block-editor package in the first place rather than components :)

This component was not exposed previously in editor. @aduth might answer better here. For me the question now is:

• Is this worth exposing (which also means maintaining)?
• Is this a generic component? Should it go in components ?
• Is this the best way to expose this behavior? Could this be a hook and share in the compose package instead?

I'd also be curious if you considered event.stopPropagation() for your use-case, as it can be a simpler alternative for most usage. I don't recall specifically why this was not sufficient for use in the editor, though may have also been related to the fact that we didn't necessarily want to prevent default event behavior.

This is a pretty complex component, and one which I could expect to become a pain to maintain, particularly if React follows-through with some of their proposed events refactoring (#4751, #13525).

• Is this a generic component? Should it go in components ?

It would be fair to say so, I think, yes.

I guess as far as making a decision here, it could be helpful to have a clearer explanation of what this component provides which is not sufficiently possible with alternatives, and whether as described it's abstracted in a way which would be adaptable to future revisions in React events behavior.

I'd also be curious if you considered event.stopPropagation() for your use-case, as it can be a simpler alternative for most usage.

In our use case, we needed to filter the default BlockMover component in order to support dragging inner blocks freely within their parent (using absolute positioning and such). For that, we had to copy over the whole component and basically change a few lines here and there.

In BlockListBlock, the block mover is also wrapped in IgnoreNestedEvents, so we just wanted to copy the behavior there.

We use it like this:

<IgnoreNestedEvents childHandledEvents={ [ 'onDragStart', 'onMouseDown' ] }>
  { /* ... */ }
</IgnoreNestedEvents>

It should be noted that this component was removed from the codebase as of #19397 (mentioned also at #19397 (comment)).