experimental.bundledDev fails in TanStack Start with Vite Plus
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Description
Which project does this relate to?
Start
Describe the bug
When enabling Vite 8's new full bundle mode via experimental.bundledDev: true inside a TanStack Start architecture, the development server fails if run with vite-plus
Complete minimal reproducer
https://github.com/nestarz/tanstack-start-mre-bundled-dev-vite-plus
Steps to Reproduce the Bug
Run pnpm dev
See error
Expected behavior
Should run without any error and js/css works
Screenshots or Videos
No response
Platform
Router / Start Version: 1.168.13
OS: macOS
Browser: all
Bundler: vite
Bundler: 8.0.0
Additional context
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the linked minimal reproducer and run pnpm dev to confirm the failure. Read the context in issue #7436 and trace how experimental.bundledDev: true is handled in the TanStack Start and Vite Plus setup. Done means the development server runs without errors and JavaScript and CSS work as expected.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript, vite
- Domain
- build-system
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 52/100