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

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维护者通常 1 天内回复

@nperez0111 已经在做这个了。

开始于 2026年10月23日。

  • #3247 来自 @nperez0111 —— 未关闭

评估

难度
3/5
预计耗时
1-2 天
新手友好度
35/100
Issue 类型
缺陷
描述清晰度
描述清楚
活跃度
停滞
技术栈
react, typescript
领域
frontend, full-stack

调研方向

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.

由索引模型根据 Issue 内容生成。

描述

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 💖
主要语言
TypeScript
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环境准备

从这里开始

  1. 先读完整个 Issue，再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库，在一个分支上完成修改。
  4. 提交 Pull Request，并在描述里引用这个 Issue 编号。

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