Vite Example

import { defineEnv, z } from 'nviron';

export const env = defineEnv(
  {
    // API Configuration
    API_URL: z.string().url(),
    API_TIMEOUT: z.coerce.number().default(5000),
    
    // App Configuration
    APP_NAME: z.string().default('My App'),
    APP_VERSION: z.string().regex(/^\d+\.\d+\.\d+$/),
    
    // Feature Flags
    ENABLE_ANALYTICS: z.coerce.boolean().default(false),
    ENABLE_DEBUG: z.coerce.boolean().default(false),
    
    // External Services
    SENTRY_DSN: z.string().url().optional(),
    ANALYTICS_ID: z.string().optional(),
    
    // Environment
    MODE: z.enum(['development', 'production', 'staging']),
  },
  {
    source: import.meta.env,
    prefix: 'VITE_',
  }
);

import React from 'react';
import ReactDOM from 'react-dom/client';
import App from './App';
import { env } from './env';

// Log environment info in development
if (env.MODE === 'development') {
  console.log('🚀 App Name:', env.APP_NAME);
  console.log('📦 Version:', env.APP_VERSION);
  console.log('🔗 API URL:', env.API_URL);
}

ReactDOM.createRoot(document.getElementById('root')!).render(
  <React.StrictMode>
    <App />
  </React.StrictMode>
);

# API Configuration
VITE_API_URL=https://api.example.com
VITE_API_TIMEOUT=5000

# App Configuration
VITE_APP_NAME=My Awesome App
VITE_APP_VERSION=1.0.0

# Feature Flags
VITE_ENABLE_ANALYTICS=false
VITE_ENABLE_DEBUG=true

# External Services
VITE_SENTRY_DSN=https://abc@sentry.io/123
VITE_ANALYTICS_ID=G-XXXXXXXXXX

# Environment
VITE_MODE=development