Y-ProseMirror always set the caret at the end of the document after initialize the editor

[ocavue]

Checklist

• [x] Are you reporting a bug? Use github issues for bug reports and feature requests. For general questions, please use https://discuss.yjs.dev/
• [x] Try to report your issue in the correct repository. Yjs consists of many modules. When in doubt, report it to https://github.com/yjs/yjs/issues/

Describe the bug

I want to initialize the editor with a particular selection position (e.g. at the start of the document), but y-prosemirror always changes the initial selection to the end of the document.

ProseMirror allows me to set the initial selection by providing an initial editor state with a selection. The code is shown below:

  const prosemirrorView = new EditorView(editor, {
    state: EditorState.create({
      doc,
      selection, // <-- here is my initial selection
      schema,
      plugins: [...]
    })
  })

Even if the initial selection is not implicitly passed, the default selection is at the start of the document.

When I use ySyncPlugin, _forceRerender will replace the content of the whole document, which make the selection at the end of the document.

To Reproduce

I prepare a simple example based on the demo/ example in this repo. You can find the code here.

$ git clone https://github.com/ocavue/y-prosemirror -b ocavue/init_selection
$ cd y-prosemirror
$ npm install 
$ npm run start 

Go to http://127.0.0.1:8081/demo/prosemirror.html. The editor should be focused and the caret is at the end of the document.

If ENABLE_YJS in demo/prosemirror.js is set as false, then the y-prosemirror in the heading will be selected after a reload.

Notice that in this example, to set the initial selection, I have to pass the initial document with two different ways in the same time:

• pass the doc to EditorState.
• pass the yDoc to ySyncPlugin.

Expected behavior

I can set the initial selection when using y-prosemirror.

Screenshots

https://user-images.githubusercontent.com/24715727/191005843-46a93d9c-9e5e-4ffc-85cc-4f46a60a0294.mp4

Environment Information

• Browser: Chrome version 105
• Yjs version and the versions of the y-* modules you are using
  • y-prosemirror@1.1.3
  • yjs@13.5.38

Additional context

I created a PR https://github.com/yjs/y-prosemirror/pull/127 to resolve this issue.

[HondryTravis]

same question

[totorofly]

I also encountered a similar situation, but in my case, I wanted the cursor to automatically focus on the beginning of the document. However, every time, I noticed the cursor appearing at the end, and then I had to wait for some time after creating the editorView, using setTimeout, before executing the operation to move the cursor to the starting position. Was this issue resolved later?

[dmonad]

A fix is now available in y-prosemirror@1.2.6