TableHandles: TypeError reading 'id' on undefined #2847

What’s broken?

On table hover/mouse-move the editor intermittently throws:

• Chrome: Cannot read properties of undefined (reading 'id')
• Firefox: can't access property "id", this.state.block is undefined

Both from TableHandles.ts:301, function querySelector.

Repro notes

Happens on documents containing tables when the hovered table block is cleared while the handles are being positioned. Non-fatal, the editor keeps working, but it surfaces as an uncaught window.onerror.

What did you expect to happen?

No console error.

Steps to reproduce

I haven't found a reliable manual repro this shows up in our production error reporting, not from a known click path. So I'm reporting it as a latent unsafe access with a clear throw site rather than a sequence of steps.

Throw site — TableHandles.ts:301:

const hideHandles =
  this.state?.block.id !== tableBlock.id || ...

The optional chain guards this.state but not this.state.block, so this throws whenever this.state is set while this.state.block is undefined.

Likely how block becomes undefined (unconfirmed — I couldn't trigger it on demand): update() does

this.state.block = this.editor.getBlock(this.state.block.id)!;

and getBlock can return undefined (the ! hides it) when the table block was removed/replaced by a doc update. That leaves state defined with block undefined; the next mouseMove hits line 301.

Suggested fix

this.state?.block?.id !== tableBlock.id

BlockNote version

v0.51.4

Environment

Firefox 150.0, Chrome 148.0

Additional context

No response

Contribution

• I'd be interested in contributing a fix for this issue

Sponsor

• I'm a sponsor and would appreciate if you could look into this sooner than later 💖