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A failed upload from a file drop or paste leaves a stuck "Loading..." block

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  • 何か問題がありますか？
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@nperez0111 がすでに取り組んでいます。

2026年10月23日 から。

  • #3247 @nperez0111 による — オープン

評価

難易度
3/5
見積もり時間
1〜2日
初心者へのやさしさ
35/100
issue の種類
バグ
明瞭さ
明確に書かれている
活発さ
停滞
技術スタック
react, typescript
領域
frontend, full-stack

調査の方向性

The report identifies handleFileInsertion, editor.uploadFile, and editor.updateBlock, but gives no file path or test name. Start by locating handleFileInsertion and tracing the drop and paste upload flow. Reproduce with uploadFile resolving to an empty string and with a rejected promise; done means a failed upload no longer leaves a Loading block and rejections are handled. An open linked pull request (#3247) already addresses this issue.

索引モデルが issue の本文から書いたものです。

説明

needs-triage
What’s broken?

When uploadFile fails for a file that was dropped or pasted into the editor, the inserted file block keeps showing "Loading..." forever. The user has to delete it by hand.

handleFileInsertion inserts a file block, awaits editor.uploadFile(file, blockId) and then always calls editor.updateBlock(blockId, { props: { url } }).

  • If uploadFile resolves with "" to report a failure, the props don't change, so the block doesn't render again. Its vanilla render replaced the "Add file" button with .bn-file-loading-preview in onUploadStart, and nothing restores it when the upload ends.
  • If uploadFile rejects, the rejection isn't caught. updateBlock never runs, the promise rejection is unhandled, and the block stays on "Loading..." as well.

The file panel's upload tab doesn't show this, because it sets name together with url. The block renders again and offers "Add file".

What did you expect to happen?

A failed upload doesn't leave a stuck placeholder. The block is either removed or goes back to its "Add file" state, and a rejected uploadFile is caught. A documented way for uploadFile to report a failure would help too.

Steps to reproduce
  1. Create an editor whose uploadFile fails: 
    const editor = useCreateBlockNote({
  uploadFile: () => Promise.resolve(""),
});
  2. Drag any file from your computer into the editor, or paste one.
  3. A file block showing "Loading..." stays in the document.

With uploadFile: () => Promise.reject(new Error("rejected")) the block stays as well, and the console shows an unhandled promise rejection.

BlockNote version

@blocknote/core, @blocknote/react, @blocknote/mantine 0.55.0

Environment

No response

Additional context

We work around it by listening to onUploadEnd and, in a timeout after BlockNote's updateBlock, removing the block if it still renders .bn-file-loading-preview.

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 💖
主要言語
TypeScript
スター
10.3k
フォーク
780
平均マージ
3日 6時間
マージ済み PR（30日）
48

環境構築

はじめの一歩

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  2. 着手することを issue にコメントします — 二人が同じ作業をするのを防げます。
  3. リポジトリをフォークし、ブランチを切って変更します。
  4. issue 番号を参照したプルリクエストを送ります。

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