How do I run Next.js, Vite, or other JS dev servers on my VM?

Configure allowedDevOrigins (Next.js) or server.allowedHosts (Vite) so the dev server accepts requests from your exe.dev hostname.

The exe.dev [HTTPS proxy](../proxy) makes requests to `https://my-vm.exe.xyz/` work
to talk to your VM. To allow Vite and Next.js to work, you need to add your
VM hostname to the framework's origin allow-list.

## Next.js

Next.js ≥ 15.2 uses `allowedDevOrigins`:

```js
// next.config.js
module.exports = {
  allowedDevOrigins: [
    'my-vm.exe.xyz',
    'my-vm.exe.xyz:8000', // and any other ports in 3000–9999 you use
  ],
};
```

```bash
npx next dev -H 0.0.0.0 -p 8000
```

See [allowedDevOrigins](https://nextjs.org/docs/app/api-reference/config/next-config-js/allowedDevOrigins).

## Vite

Vite ≥ 5.0 uses `server.allowedHosts`:

```js
// vite.config.js
import { defineConfig } from 'vite';

export default defineConfig({
  server: {
    host: '0.0.0.0',
    port: 5173,
    allowedHosts: ['my-vm.exe.xyz'],
  },
});
```

See [server.allowedHosts](https://vitejs.dev/config/server-options.html#server-allowedhosts).