Bundled dev: Phase 1 feedbacks

[sapphi-red]

We're opening a discussion to gather feedback about this feature for the phase 1. See Bundled dev mode design doc and Road Map for more details.

[ocavue]

Hi. I get the Uncaught ReferenceError: __reExport is not defined error when I have experimental.bundledDev enabled.

The repo is open source, but it's not a minimal reproduction, though. Just in case the Vite team wants some quick feedback.

Here is the steps to reproduce:

$ git clone https://github.com/prosekit/meowdown --branch ocavue/vite-bundled

$ cd meowdown

$ pnpm install 

$ git log -n 1 --oneline
b7519b0 chore: enable vite bundledDev

$ npx envinfo --system --npmPackages '{vite,@vitejs/*,rollup,rolldown}' --binaries --browsers

  System:
    OS: macOS 15.7.7
    CPU: (8) arm64 Apple M2
    Memory: 136.67 MB / 24.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 24.15.0 - /opt/homebrew/opt/node@24/bin/node
    Yarn: 1.22.22 - /opt/homebrew/opt/node@24/bin/yarn
    npm: 11.12.1 - /opt/homebrew/opt/node@24/bin/npm
    pnpm: 11.8.0 - /opt/homebrew/opt/node@24/bin/pnpm
    bun: 1.3.6 - /opt/homebrew/bin/bun
    Deno: 2.6.10 - /opt/homebrew/bin/deno
  Browsers:
    Chrome: 149.0.7827.115
    Chrome Canary: 151.0.7904.0
    Firefox: 147.0.1
    Firefox Developer Edition: 148.0
    Safari: 26.5
    Safari Technology Preview: 26.0
  npmPackages:
    vite: ^8.1.0 => 8.1.0

$ pnpm run dev

  VITE v8.1.0  ready in 225 ms

  ➜  Local:   http://localhost:5173/

I got the following error in the browser console:

[greeeg]

Thanks Vite team for working on this!

When trying it out, I'm getting a MISSING_EXPORT error. My source code (Typescript) relies on imports from JavaScript files.

// myFile.ts
import {
  getCompanySupplierInvoicesQueryKey,
  getCountSummaryCompanySupplierInvoicesQueryKey,
} from 'queries/supplierInvoices'

// queries/supplierInvoices.js
export const getCompanySupplierInvoicesQueryKey = (parameters) => {
  return parameters ? ['getCompanySupplierInvoices', parameters] : ['getCompanySupplierInvoices']
}

// [MISSING_EXPORT] "getCompanySupplierInvoicesQueryKey" is not exported by "queries/supplierInvoices.js?rolldown-lazy=1".
//    ╭─[ myFile.ts:2:10 ]
//    │
//  2 │ import { getCompanySupplierInvoicesQueryKey } from "queries/supplierInvoices";
//    │          ─────────────────┬────────────────
//    │                           ╰────────────────── Missing export