# CHAPTER 1 SUMMARY

## Key Concepts Introduced
1. **API** - Application Programming Interface, digital waiter metaphor - Used in chapters: ALL
2. **HTTP Protocol** - The language of web APIs - Used in chapters: ALL
3. **HTTP Verbs** - GET, POST, PUT, DELETE - Used in chapters: 3, 4, 7, 8
4. **Status Codes** - 200 (success), 404 (not found), 500 (server error) - Used in chapters: 5, 10, 12
5. **fetch()** - Browser's built-in API calling method - Used in chapters: 2 (for comparison)
6. **JSON** - JavaScript Object Notation, data format - Used in chapters: ALL
7. **API Request/Response** - Order/meal metaphor - Used in chapters: 2, 3, 4

## Code Patterns Established
```javascript
// Pattern 1: Basic fetch
fetch('https://api.example.com/endpoint')
  .then(response => response.json())
  .then(data => console.log(data))

// Pattern 2: Async/await fetch
const response = await fetch('https://api.example.com/endpoint')
const data = await response.json()

// Pattern 3: Error awareness (introduced, not handled)
// Sets up Chapter 5's focus on error handling
```

## API Endpoints Used
- icanhazdadjoke.com - Returns random dad jokes
- jsonplaceholder.typicode.com/users - Fake REST API for testing
- wttr.in/{city}?format=%C+%t - Simple weather API
- randomuser.me/api - Random user generator
- api.coindesk.com/v1/bpi/currentprice.json - Bitcoin price
- api.quotable.io/random - Random quotes
- httpstat.us/{code} - HTTP status code testing

## Metaphors Established
- **Restaurant Metaphor**: API = Waiter, Kitchen = Server, Menu = Documentation
- This metaphor will be referenced throughout the book

## Building Blocks for Next Chapter
- Learned: What APIs are, how to call them with fetch()
- Pain points shown: Verbose syntax, no error handling, no type safety
- Next: TypedFetch will solve all these problems

## Weather Buddy App Status
- Created: Basic HTML page with weather button
- Functionality: Shows weather for Seattle
- Next evolution: Will convert to use TypedFetch in Chapter 2