custom block Copying and pasting will result in an error

[q2177329q]

Describe the bug
987.94bd8b52946dbc4b.js:9 Uncaught TypeError: Cannot read properties of null (reading 'firstChild')
at Y.addAll (987.94bd8b52946dbc4b.js:9:94126)
at Y.addElementByRule (987.94bd8b52946dbc4b.js:9:94028)
at Y.addElement (987.94bd8b52946dbc4b.js:9:92610)
at Y.addDOM (987.94bd8b52946dbc4b.js:9:91128)
at Y.addAll (987.94bd8b52946dbc4b.js:9:94220)
at _.parseSlice (987.94bd8b52946dbc4b.js:9:87860)
at eW (849baa33.2286729f2173c959.js:1:38904)
at tr (849baa33.2286729f2173c959.js:1:51532)
at tK.pasteHTML (849baa33.2286729f2173c959.js:1:90793)
at C.paste (4018.8ec8146930b55b85.js:1:149304)

To Reproduce
https://www.blocknotejs.org/docs/custom-schemas/custom-blocks#custom-block-types. the sample has the same issue, here is a video. and The procedure is Select some text -> copy(command + C on Mac) -> paste(command + V on mac). you will see the error log

CleanShot.2024-10-14.at.17.12.20.mp4

Misc

• Node version: v18.17.0
• Package manager: npm
• Browser: chrome v 126
• I'm a sponsor and would appreciate if you could look into this sooner than later 💖

[Elon-Mask12]

facing the same issue. tried setting parsekey, but its getting ignored.

[YousefED]

Thanks!

First diagnosis:

The ParseRule can't find the DOM element. This can be fixed by changing:

renderHTML({ HTMLAttributes }) {
      // renderHTML is used for copy/pasting content from the editor back into
      // the editor, so we need to make sure the `blockContent` element is
      // structured correctly as this is what's used for parsing blocks. We
      // just render a placeholder div inside as the `blockContent` element
      // already has all the information needed for proper parsing.
      const div = document.createElement("div");
      div.setAttribute("data-editable", "true");

and adding div.setAttribute("data-tmp-placeholder", "true");

Let's:

a) diagnose why this goes wrong now (seems like a regression)
b) add unit tests
c) create a proper fix (not sure if the above is a proper fix or not without step (a))

[q2177329q]

When can I use the new version. Is it possible to release a beta version first? I'm already using this feature in my production environment