Build

I highly recommend that you create a git repository for Chirpy hosted on GitHub (or whichever host you prefer), then clone the repo down onto your local machine. It's not a requirement, but a best practice. Use Git to save your work as you go.

The npm init command creates a package.json file to track the project's scripts and dependencies. The TypeScript compiler reads tsconfig.json to find the source files in src and compile them into JavaScript files in dist.

Set up a runnable TypeScript project.

1. Initialize a Node.js project in the project root:

npm init -y

2. Install TypeScript and the Node.js type definitions as development dependencies:

npm install -D typescript @types/node

3. Create a tsconfig.json file in the project root:

{
  "compilerOptions": {
    "target": "esnext",
    "module": "nodenext",
    "rootDir": "./src",
    "outDir": "./dist",
    "strict": true,
    "moduleResolution": "nodenext",
    "esModuleInterop": true,
    "skipLibCheck": true
  },
  "include": ["./src/**/*.ts"],
  "exclude": ["node_modules"]
}

4. Update package.json to use ES modules and add scripts to build, start, and develop the project:

{
...
  "type": "module",
  "scripts": {
    "build": "npx tsc",
    "start": "node dist/index.js",
    "dev": "npx tsc && node dist/index.js"
  },
...
}

5. Create a src directory, then create src/index.ts and have it print "Hello, World!".
6. Create a .gitignore file that ignores the node_modules/ and dist/ directories.
7. Run npm run dev and confirm that Hello, World! appears in your terminal.

Run and submit the CLI tests from the project root.