Return pos if descObj.parent is null

[egwoo]

In the example at https://tiptap.dev/api/nodes/task-item if you try to click the checkbox to toggle the todo item, you get a console error message:

Uncaught RangeError: Index 1 out of range for <taskList(taskItem(paragraph("A list item")), taskItem(paragraph("And another one")))>
    at F.child (vendor.248662a3.js:5:26763)
    at F.findIndex (vendor.248662a3.js:5:27448)
    at Me.nodeAt (vendor.248662a3.js:5:40931)
    at index.8f971c3d.js:1:2515
    at tabindex.0101c1e1.js:3:1741
    at Object.command (tabindex.0101c1e1.js:3:24344)
    at HTMLInputElement.<anonymous> (index.8f971c3d.js:1:2476)

Looking into this, it looks like descObj exists, but descObj.parent is null, so the function returns nothing. When I changed the return value to pos, it started working again.

[marijnh]

It looks like that could only happen when you call getPos after your node view is no longer part of the document. At that point, there is no meaningful document position for it so it seems that returning pos (the original position at which the node view was created) is just going to cover up a deeper problem, and probably not actually do the right thing.