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Solid.js 'multiple instances' warnings appear in React apps with Vite 8 #411
Description
TanStack Devtools version
@tanstack/react-devtools v0.10.1, @tanstack/devtools-vite v0.6.0
Framework/Library version
React 19.2.4, TanStack Start 1.167.16, Vite 8.0.3
Describe the bug and the steps to reproduce it
When using TanStack Devtools in a React TanStack Start app with Vite 8, the following warnings appear in the terminal and browser when starting the dev server
❯ bun run dev
$ vite dev --port 3000
VITE v8.0.3 ready in 1039 ms
➜ Local: http://localhost:3000/
➜ Network: use --host to expose
➜ press h + enter to show help
[vite] connected.
9:48:32 AM [vite] (client) [console.warn] You appear to have multiple instances of Solid. This can lead to unexpected behavior.
9:48:32 AM [vite] (client) [console.warn] You appear to have multiple instances of Solid. This can lead to unexpected behavior.
9:48:32 AM [vite] (client) [console.warn] computations created outside a `createRoot` or `render` will never be disposed
9:48:32 AM [vite] (client) [console.warn] computations created outside a `createRoot` or `render` will never be disposed
9:48:32 AM [vite] (client) [console.warn] cleanups created outside a `createRoot` or `render` will never be run
9:48:32 AM [vite] (client) [console.warn] computations created outside a `createRoot` or `render` will never be disposed
9:48:32 AM [vite] (client) [console.warn] computations created outside a `createRoot` or `render` will never be disposed
9:48:32 AM [vite] (client) [console.warn] cleanups created outside a `createRoot` or `render` will never be run
9:48:32 AM [vite] (client) [console.warn] computations created outside a `createRoot` or `render` will never be disposed
9:48:32 AM [vite] (client) [console.warn] cleanups created outside a `createRoot` or `render` will never be run
9:48:32 AM [vite] (client) [console.warn] cleanups created outside a `createRoot` or `render` will never be run
9:48:32 AM [vite] (client) [console.warn] computations created outside a `createRoot` or `render` will never be disposed
These warnings do not appear with Vite 7 using the exact same dependencies and configuration.
Steps to reproduce:
- Clone the repro repo and install dependencies:
git clone https://github.com/abed-daloopa/tanstack-devtools-solid-warnings cd tanstack-devtools-solid-warnings bun install - Run the dev server:
bun run dev
- Open http://localhost:3000 — warnings appear in the browser console and terminal.
To verify Vite 8 is the cause, downgrade to Vite 7:
- "vite": "^8.0.3"
+ "vite": "^7.3.1"Or add resolve.dedupe: ["solid-js"] to vite config
Reinstall and run ➡︎ warnings disappear.
Root cause: Vite 8 resolves Solid.js as multiple instances at runtime, even when only one copy exists in node_modules. Vite correctly deduplicates it.
Note: Adding resolve.dedupe: ["solid-js"] to the Vite config fixes the issue.
Your Minimal, Reproducible Example - (Sandbox Highly Recommended)
https://github.com/abed-daloopa/tanstack-devtools-solid-warnings
Screenshots or Videos (Optional)
No response
Do you intend to try to help solve this bug with your own PR?
Maybe
Terms & Code of Conduct
- I agree to follow this project's Code of Conduct
- I understand that if my bug cannot be reliable reproduced in a debuggable environment, it will probably not be fixed and this issue may even be closed.
Activity
rbrito02 commentedon Apr 2, 2026
@tanstack/devtools-vitealready has a config() hook atsrc/plugin.ts(@tanstack/devtools:config) that currently does nothing during serve mode (just returns). A minimal fix would be to return resolve.dedupe from it so Vite 8 collapses all solid-js imports into a single instance:If looks good will make PR for it
rbrito02 commentedon Apr 2, 2026
have been having some issue today though after updating deps on project
abed-daloopa commentedon Apr 2, 2026
Another issue with Vite 8 (not sure what the cause exactly)
I have to add
devtools({ consolePiping: { enabled: false } })to the vite config or I will get spammed by an infinte number of messages whenever an error happensrbrito02 commentedon Apr 2, 2026
I've had this spam reported if serving
bun run devfrom a terminal within ide (e.g. cursor, vscode). But doesn't seem to occur in terminal apps (e.g. terminal, iterm2, ghostty). However, error spam is strong enough to freeze dev environment.rbrito02 commentedon Apr 2, 2026
Seems to be caused by the following flow:
consolePipinggrabs it and POSTS to/_tsd/console-pipecould use a guard to prevent repeated calls.
@abed-daloopa when enabling dedupe for solidJS did you still have the infinite errors?
abed-daloopa commentedon Apr 2, 2026
This issue is unrelated to the Solid.Js multiple instances problem.
Even when adding
dedupe: ["solid-js"]If any other error happens, I get spammed if i don't set
{ consolePiping: { enabled: false } }Note: I am running
bun run devinside Cursor's integrated terminal