Change8
Error1 reports

Fix WebSocketError

in Bun

Solution

WebSocketError in Bun often arises from attempting to use WebSocket APIs in environments where they are not fully supported, like the Bun bundler or certain testing contexts, as Bun’s native WebSocket implementation might be incomplete. To resolve this, either use a polyfill like 'ws' from npm and ensure your code uses that implementation, or mock the necessary WebSocket functions during testing or bundling processes to avoid direct reliance on Bun's potentially incomplete native version.

Related Issues

Real GitHub issues where developers encountered this error:

Timeline

First reported:Dec 4, 2025
Last reported:Dec 4, 2025

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