Data Management & APIs

Every app you build is really a pipeline that moves data: it arrives as JSON from an API, gets fetched, checked, reshaped, and finally shown on screen. This tutorial walks that whole pipeline end to end using real, runnable code against free public APIs like JSONPlaceholder and Open-Meteo — no toy examples.

You'll start with the three shapes all data takes (objects, arrays, and JSON), then fetch live data with async/await while handling loading and error states. From there you'll tackle the things production APIs throw at you — API keys kept safely server-side, pagination, 429 rate limits, and caching — before storing, filtering, sorting, and rendering the result.

Each chapter pairs a worked example with a short prompt-writing exercise, so you leave able to describe exactly what you want and get reliable code back, plus the understanding to verify it.