tsc

/* This quickstart demonstrates how to set up and use the actual TypeScript compiler (tsc) by installing the officially supported 'typescript' npm package. */ // 1. Initialize a new Node.js project // npm init -y // 2. Install the official TypeScript compiler as a development dependency // npm install --save-dev typescript // 3. Initialize a tsconfig.json file for your project (optional, but recommended) // npx tsc --init // 4. Create a TypeScript file (e.g., src/index.ts) // (You would typically create this file manually or through your IDE) // src/index.ts interface User { id: number; name: string; email?: string; } function greetUser(user: User): string { return `Hello, ${user.name} (ID: ${user.id})!`; } const newUser: User = { id: 1, name: 'Alice', email: 'alice@example.com', }; console.log(greetUser(newUser)); // 5. Compile your TypeScript code to JavaScript // npx tsc // This will create a 'dist' folder (or your configured outDir) with index.js // You can then run the compiled JavaScript: // node dist/index.js // Output in console: Hello, Alice (ID: 1)!