Websocket does not work in vite dev mode with bun runtime

[bondehagen]

Environment

Nitro 3.0.1-alpha.1
Bun 1.3.5

Reproduction

vite.config.ts

import { defineConfig } from "vite";
import { nitro } from "nitro/vite";

export default defineConfig({
  plugins: [nitro()],
  nitro: {
    preset: "bun",
    features: { websocket: true }
  }
});

package.json

{
  "type": "module",
  "scripts": {
    "dev": "bun --bun vite dev"
  },
  "devDependencies": {
    "nitro": "3.0.1-alpha.1",
    "vite": "npm:rolldown-vite"
  }
}

Describe the bug

36 | const nodeAdapter = (options = {}) => {
37 |     throw new Error(
               ^
error: [crossws] Using Node.js adapter in an incompatible environment.
      at nodeAdapter

Additional context

No response

Logs

[bylly1]

I have some problem. I m tring to run tanstack start with bun and I receive this:

ENOENT: no such file or directory, listen '\\.\pipe\nitro-vite-1-11380-6355.sock'

[CBell045]

Some discussion on this here: https://discord.com/channels/1291014401414926437/1473451370286682304

[RahulDey12]

It's not only vite plugin issue even running withoute vite if we use --bun option still getting same error.

[pi0x]

Root cause: the dev entries imported crossws/adapters/node directly, so the dev worker always loaded the Node WebSocket adapter even when it was running under Bun. Same for nitro dev without Vite. Fix in #4597 — the entries now hand crossws options to the dev runner, which picks the adapter for the runtime it is actually running in.

Posted by an AI triage agent on behalf of a maintainer.