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Fix blank page from broken React Fast Refresh runtime #8

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Merged
arena-ai-coding-agent merged 1 commit into from
Aug 12, 2026
Merged

Fix blank page from broken React Fast Refresh runtime #8

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58 changes: 34 additions & 24 deletions frontend/vite.config.js
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Original file line number Diff line number Diff line change
@@ -1,34 +1,44 @@
import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';
import tailwindcss from '@tailwindcss/vite';
import path from 'path';
import { fileURLToPath } from 'url';

const __dirname = path.dirname(fileURLToPath(import.meta.url));
/**
* plugin-react 6 / Vite 8 no longer export RefreshRuntime.getRefreshReg.
* Cached or older transforms still call it and crash the app with a blank page:
* TypeError: RefreshRuntime.getRefreshReg is not a function
*/
function reactRefreshCompat() {
return {
name: 'react-refresh-getRefreshReg-compat',
enforce: 'pre',
transform(code, id) {
const isRefreshRuntime =
id === '/@react-refresh' ||
id.endsWith('/@react-refresh') ||
id.includes('refresh-runtime.js');

const fromNodeModules = (...segments) => path.resolve(__dirname, 'node_modules', ...segments);
if (!isRefreshRuntime || code.includes('export function getRefreshReg')) {
return null;
}

return {
code: `${code}

export function getRefreshReg(filename) {
return (type, id) => {
register(type, filename + ' ' + id);
};
}
`,
map: null
};
}
};
}

export default defineConfig({
plugins: [
react({
babel: {
plugins: []
},
fastRefresh: false
}),
tailwindcss()
],
plugins: [react(), reactRefreshCompat(), tailwindcss()],
resolve: {
alias: [
// Keep every React entrypoint on the same physical package. This prevents
// Vite's dependency optimizer from serving mixed React instances after it
// discovers new deps during development, which causes "Invalid hook call".
{ find: /^react$/, replacement: fromNodeModules('react', 'index.js') },
{ find: /^react\/jsx-runtime$/, replacement: fromNodeModules('react', 'jsx-runtime.js') },
{ find: /^react\/jsx-dev-runtime$/, replacement: fromNodeModules('react', 'jsx-dev-runtime.js') },
{ find: /^react-dom$/, replacement: fromNodeModules('react-dom', 'index.js') },
{ find: /^react-dom\/client$/, replacement: fromNodeModules('react-dom', 'client.js') }
],
dedupe: [
'react',
'react/jsx-runtime',
Expand All @@ -40,7 +50,6 @@ export default defineConfig({
]
},
optimizeDeps: {
entries: ['index.html', 'src/**/*.{js,jsx,ts,tsx}'],
include: [
'axios',
'i18next',
Expand All @@ -60,6 +69,7 @@ export default defineConfig({
server: {
port: 5173,
host: true,
allowedHosts: true,
proxy: {
'/api': {
target: 'http://localhost:5000',
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