enable hot reload for vite react project instead of page reload

Question

I am new to vite and I just started a new react application. My project had hmr (hot module replacement) enabled and it was ok. I just added some changes but when I start it now the hmr is disabled and when adding new change the browser is reloading (not updating fast) and in the terminal it logs: 12:37:54 PM [vite] page reload src/App.tsx I created a new test application and it has hmr enabled and when I add any change it logs: 12:35:23 PM [vite] hmr update /src/App.tsx (x2) Can any you tell me how to enable hmr instead of page reload?

Here is my vite.config.ts for project that logs page reload

import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [react()]
})

and also tsconfig.json for project that logs page reload

{
  "compilerOptions": {
    "target": "ESNext",
    "useDefineForClassFields": true,
    "lib": ["DOM", "DOM.Iterable", "ESNext"],
    "allowJs": false,
    "skipLibCheck": false,
    "esModuleInterop": false,
    "allowSyntheticDefaultImports": true,
    "strict": false,
    "forceConsistentCasingInFileNames": true,
    "module": "ESNext",
    "moduleResolution": "Node",
    "resolveJsonModule": true,
    "isolatedModules": true,
    "noEmit": true,
    "jsx": "react-jsx"
  },
  "include": ["./src"]
}

Answer 1

After following the searching; I found this link. The problem is if any of exports are named exports like export const foo = 12 this will break hmr. so after changing to export default function FooBar(){} hmr is working.

Answer 2

I encountered this issue as well, what fixed it for me was removing the sub directory for each file inside pages directory.

My previous folder structure:

??? src
?   ??? Components
?   ??? Pages
?   ?   ??? Home
?   ?   ?   ??? Home.styled.jsx
?   ?   ?   ??? Index.jsx
?   ?   ??? About
?   ?   ?   ??? About.styled.jsx
?   ?   ?   ??? Index.jsx

Fix

It worked when I changed my folder structure to this, and updated my App.jsx to the files directly:

So from this (./pages/Home/) to (./pages/Home.jsx)

??? src
?   ??? Components
?   ??? pages
?   ?   ??? Home.jsx
?   ?   ??? About.jsx

Answer 3

I was having this issue also and after reading the docs more carefully I realized that I only needed to add this to any of the js/ts files which vite is aware of (referenced in the index.html file) and it started working:

import.meta.hot