`@blocknote/react` doesn't work with React 19 RC

[leonsilicon]

Describe the bug
@blocknote/react doesn't work with React 19 RC as it uses React internals

To Reproduce
https://stackblitz.com/edit/github-ekywvq?file=package.json

Misc

• Node version: 20.16.0
• Package manager: bun
• Browser: Arc
• I'm a sponsor and would appreciate if you could look into this sooner than later 💖

[YousefED]

Thanks @leonsilicon. I don't think this is because BlockNote uses internal APIs, but because we have a peerdependency:

 "peerDependencies": {
    "react": "^18",
    "react-dom": "^18"
  },

This will cause react 18 to be installed in node_modules/@blocknote/react/node_modules, causing two different react runtimes side by side.

I haven't tested upgrading this myself, but perhaps this pointer could work. I recommend checking and testing blocknote by checking out your own copy and upgrading the peer dependency and running the tests.

What are you building with BlockNote btw?

[leonsilicon]

Ah, sorry I initially saw the error stacktrace point to a file in the @blocknote/react node_modules folder (dist/blocknote-react.js) and assumed it was Blocknote-specific code; upon a second look it seems like that's actually React 18's JSX Runtime library code react-jsx-runtime.(development|production).js bundled into Blocknote's distribution build.

I'm not sure how one would make that bundled jsx-runtime code compatible with both React 18 and 19 but in the meantime will try bumping the peerDependencies and rebuilding to see if that fixes the issue!

[KingXP-Pythoner]

struggling with this currently and saw this. makes sense now. ill test out bumping the peerdeps

Thanks @leonsilicon. I don't think this is because BlockNote uses internal APIs, but because we have a peerdependency:

 "peerDependencies": {
    "react": "^18",
    "react-dom": "^18"
  },

This will cause react 18 to be installed in node_modules/@blocknote/react/node_modules, causing two different react runtimes side by side.

I haven't tested upgrading this myself, but perhaps this pointer could work. I recommend checking and testing blocknote by checking out your own copy and upgrading the peer dependency and running the tests.

What are you building with BlockNote btw?

[KingXP-Pythoner]

struggling with this currently and saw this. makes sense now. ill test out bumping the peerdeps

Thanks @leonsilicon. I don't think this is because BlockNote uses internal APIs, but because we have a peerdependency:

 "peerDependencies": {
    "react": "^18",
    "react-dom": "^18"
  },

This will cause react 18 to be installed in node_modules/@blocknote/react/node_modules, causing two different react runtimes side by side.
I haven't tested upgrading this myself, but perhaps this pointer could work. I recommend checking and testing blocknote by checking out your own copy and upgrading the peer dependency and running the tests.
What are you building with BlockNote btw?

update: I was unable to do a rebuild as I kept running into errors. i'm a noob when it comes to low-level library stuff. will just have to wait till blocknote supports react 19 when it comes out :)

[irakli2206]

Still facing the same issue, peerDependencies don't help at all.

[KingXP-Pythoner]

Still facing the same issue, peerDependencies don't help at all.

Good news is there's a PR already for this 😁

[oconnorjohnson]

A new PR? I don't see one open -- I'm still facing the same issue in the screenshot, after updating BlockNote and my app to Next.js 15

[KingXP-Pythoner]

A new PR? I don't see one open -- I'm still facing the same issue in the screenshot, after updating BlockNote and my app to Next.js 15

PR #1173

[ryleyrandall22]

@YousefED Thank you for working on this so quickly!