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tryParseMarkdownToBlocks throws on a numbered or check list item that starts with <details>

Aperta
  • Qualcosa non va?
#3,189 2 commenti 0 reazioni 0 assegnatari Vedi su GitHub

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@jkugsiya ci sta già lavorando.

Dal 14/10/2026.

  • #3194 di @jkugsiya — aperta

Valutazione

Difficoltà
4/5
Tempo stimato
3-5 giorni
Idoneità per principianti
45/100
Tipo di issue
Bug
Chiarezza
Specificata chiaramente
Stato di attività
Attiva
Stack tecnologico
html, markdown, typescript
Ambito
frontend

Direzione di ricerca

Start by reproducing with editor.tryParseMarkdownToBlocks("1. <details>") and checking the HTML from markdownToHTML for the same input. The likely cause is the toggle list item's details parse rule matching inside numbered and check list items, which leaves a blockContainer with a blockGroup but no blockContent. Done when the table's throwing inputs return blocks without error, and Markdown from blocksToMarkdownLossy loads again.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

What’s broken?

editor.tryParseMarkdownToBlocks throws when a numbered or check list item starts with a <details> tag:

Error: blockContainer node does not contain a blockContent node in its children: blockContainer(blockGroup(blockContainer(paragraph)))

The editor can produce this Markdown itself. Type <details> as plain text in a numbered list item, and blocksToMarkdownLossy exports 1. <details>. Loading that export back throws, so a document saved as Markdown can no longer be opened.

Markdown Result
1. <details> throws
- [ ] <details> throws
1. <details> followed by indented <summary>s</summary>, body, </details> throws
- <details> ok (toggleListItem)
<details> ok (toggleListItem)
1. text <details> ok (numberedListItem)
1. <div> ok (numberedListItem)
1. <summary> ok (numberedListItem)

markdownToHTML("1. <details>") gives <ol><li><p><details></p></li></ol>. My guess is that the toggle list item's details parse rule matches inside a numbered or check list item and leaves the outer blockContainer with a blockGroup but no blockContent.

What did you expect to happen?

tryParseMarkdownToBlocks returns blocks for any Markdown, keeping what it cannot represent as text. At the least, Markdown that blocksToMarkdownLossy wrote should load again.

Steps to reproduce

Default schema, no extensions:

import { BlockNoteEditor } from "@blocknote/core";

const editor = BlockNoteEditor.create();

// 1. Parsing throws.
editor.tryParseMarkdownToBlocks("1. <details>");

// 2. The editor's own export does not load again.
editor.replaceBlocks(editor.document, [
  { type: "numberedListItem", content: "<details>" },
]);
const markdown = editor.blocksToMarkdownLossy(editor.document); // "1. <details>\n"
editor.tryParseMarkdownToBlocks(markdown); // throws

In an app: type 1. and then <details> in an editor, save the document with blocksToMarkdownLossy, and load it with tryParseMarkdownToBlocks.

BlockNote version

v0.55.0 (also v0.54.0)

Environment

Chromium 151 on macOS 15 with React 19 (v0.54.0), and Node 24 with jsdom 30 (v0.54.0 and v0.55.0). Same error in both.

Additional context

Possibly related to #1711, which reported the same error message for a different input and was closed as working.

Lingua principale
TypeScript
Stelle
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Fork
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Merge medio
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PR unite (30g)
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