JavaScript · Track

API

Follow the sections in order. Each topic starts with a short explanation before the exercises.

3 levels 14 topics 70 exercises

Learning order

Sections and topics

Open topics from top to bottom inside each level, or jump to the part you need.

Beginner

6 topics · 30 exercises

Your First Request Make your first HTTP request with fetch and read the JSON response. 5 tasks Query Parameters Filter, search, sort, and paginate API results using query parameters with URLSearchParams. 5 tasks Working with Categories Fetch and explore product categories, then use them to filter the product list. 5 tasks Pagination Iterate through multi-page API responses to collect all results. 5 tasks Headers and the Echo Endpoint Add custom HTTP headers to requests and use the echo endpoint to inspect what you send. 5 tasks Redirects Understand HTTP redirects and control how fetch handles them. 5 tasks

Intermediate

5 topics · 25 exercises

Token Authentication Register a user, obtain an auth token, and make authenticated API requests. 5 tasks JWT Authentication Use JSON Web Tokens for authentication, understand access/refresh token flow, and handle token refresh. 5 tasks Shopping Cart Add, update, and remove cart items using authenticated fetch requests. 5 tasks Orders Place orders from your cart and inspect your order history. 5 tasks User Profile Read and update a user profile with GET, PATCH, and PUT requests. 5 tasks

Advanced

3 topics · 15 exercises

API Client Class Wrap an API in a reusable class for clean, maintainable fetch-based code. 5 tasks Error Handling Handle HTTP errors and network failures robustly using response.ok and try/catch. 5 tasks Parallel Requests with Promise.all Use Promise.all to make concurrent API requests and speed up multi-call scripts. 5 tasks