.env.local May 2026

const databaseUrl = process.env.DATABASE_URL; app.use(`/${databaseUrl}`);

PORT=3000 NODE_ENV=development Next, create a .env.local file for environment-specific variables: .env.local

# .env.local.development DATABASE_URL=postgresql://user:password@localhost:5432/dev_database const databaseUrl = process

Let's consider an example use case with Node.js and Express. Suppose you have a project that requires different database connections for development, staging, and production. You can define shared variables in a .env file: const databaseUrl = process.env.DATABASE_URL