Examples

Basic Examples

Hello World

console.log('Hello, World!');

Fetching Data

interface User {
  id: number;
  name: string;
  email: string;
}

async function fetchUsers(): Promise<User[]> {
  const response = await fetch('https://api.example.com/users');
  return response.json();
}

// Usage
const users = await fetchUsers();
console.log(users);

Step-by-Step Tutorial

Create a new file
Terminal window
```
touch src/hello.js
```

Add your code

export function greet(name) {
  return `Hello, ${name}!`;
}

Import and use it

import { greet } from './hello.js';

console.log(greet('World'));

Common Patterns

Error Handling

try {
  const data = await fetchData();
  process.exit(0);
} catch (error) {
  if (error instanceof NetworkError) {
    console.error('Network failed:', error.message);
  } else {
    throw error;
  }
}

Event Handling

element.addEventListener('click', (event) => {
  event.preventDefault();
  console.log('Clicked!');
});

Async/Await Pattern

async function processItems(items: string[]) {
  const results = await Promise.all(
    items.map(async (item) => {
      const processed = await process(item);
      return processed;
    })
  );

  return results;
}