useEffect does not re-fire on hot reload with React 19 - Githubissues

vitejs / vite-plugin-react-swc

Speed up your Vite dev server with SWC

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useEffect does not re-fire on hot reload with React 19 #214

Open gkiely opened 2 weeks ago

gkiely commented 2 weeks ago

Description: In prior versions of react, saving a file will trigger the components useEffect hooks to run. This does not work for react 19.

Repo: https://github.com/gkiely/swc-issue

Steps to reproduce:

npm i
npm run dev
open repo and press save in App.tsx
console.log will not fire after pressing save
npm i react@latest react-dom@latest
npm run dev
press save in App.tsx
console.log will fire

Video reproduction: https://www.loom.com/share/b493602e3f7244d2948c5bb871531881?sid=c9bdec15-5b87-4375-a659-6c63804cb032