The Retry Never Got Announced: Debugging a Stuck aria-busy in a Streaming Chat

说明与用途

在聊天界面中，aria‑busy 在重试后未被清除，导致屏幕阅读器未能朗读完整答案。清除 aria‑busy 后问题得到解决。

问题

A screen reader silently ignored a retried message in a streaming chat, while the visible text appeared and the error message was announced.

结果

The bug was caused by leaving aria-busy set to true on the retried message, which prevented the live region from announcing it. Clearing aria-busy on all code paths resolved the issue.

工作流

• 1. User submits a prompt and the client streams tokens into a message element with aria-busy="true".
• 2. The stream fails mid‑sentence and emits an error event; the message element remains busy.
• 3. User clicks Retry, triggering a new stream that completes successfully.
• 4. The client never clears aria-busy on the retried message, so the live region stays busy and the retried text is not announced.

证据

During the retry: nothing.

来源

The live region was present, correctly labelled, and working on the happy path.

来源

The buggy client, in eleven lines

来源