Vite middleware broken in v2

[QuentinDutot]

Environment

Operating System: MacOS
H3 Version: [email protected]
Package Manager: [email protected]

Reproduction

bun run index.ts

import { serve } from 'bun'
import { createH3, fromNodeHandler, toWebHandler } from 'h3-nightly'
import { createServer } from 'vite'

const app = createH3({
  onError: console.error,
})

app.get('/', () => 'Hello World')

const vite = await createServer({
  server: { middlewareMode: true },
  appType: 'custom',
})

app.use(fromNodeHandler(vite.middlewares))

serve({ fetch: toWebHandler(app) })

Describe the bug

The server now returns an error 500 on any route.

1311 |   if (typeof handler !== "function") {
1312 |     throw new TypeError(`Invalid handler. It should be a function: ${handler}`);
1313 |   }
1314 |   return (event) => {
1315 |     if (!event.node) {
1316 |       throw new Error(
                       ^
error: [h3] Executing Node.js middleware is not supported in this server!

Additional context

No response

Logs

No response

[s3xysteak]

import { serve } from 'bun'

As I known, Vite is created based on Node.js.

[QuentinDutot]

Yes, the Vite middleware is still a node connect instance

The fromNodeHandler function transforms the Node syntax (req, res) => {} into an h3 handler.
This handler should be able to run on any runtime and not just Node as stated in the docs

Runtime Agnostic
Your code will work on any JavaScript runtime including Node.js, Bun, Deno and Workers.