How to move the cursor to the first position of a node?

[Pier]

@marijn in this post you seem to suggest that the content should be used to get a node and find its absolute position in the doc:

Best way to find a position of a node

It sounds like you’re treating the node’s object identity as a reliable way to identify it, which is not a good idea (the same node object may occur multiple times in a document, or it may be replaced with another object that has the same content by a step). Nodes are ‘value types’ — their content is what matters, their object identity shouldn’t be used. So, given that, you are probably asking the wrong question. If you want to track a node, get its initial position and map that position throug…

So I tried traversing the document nodes from the view:

for (const child of view.docView.children) {
  if (child.node.content === someStateNode.content) return child.posAtStart;
}

Obviously this doesn’t work.

Is there some util function in ProseMirror to compare content of nodes?

If comparing the content is not the right approach, then what would be?

Edit:

Since this content thing seemed pretty inefficient and hackish I found I can actually get the absolute document position of a cursor with $someCursor.parentOffset.

So now the trick is to actually create a cursor that falls on the node in question. In my case I could simply use findCutBefore($cursor) which would put the cursor at the end of the previous node and then substract the nodeSize from that.

Here is the full solution:

let $beforeCursor = findCutBefore($cursor);
const pos = $beforeCursor.parentOffset - $beforeCursor.nodeBefore.nodeSize;
dispatch(state.tr.setSelection(TextSelection.create(state.doc, pos)));

This does the trick, at least in my use case.