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Data Fetching

Master the Fetch API, Promises, async/await, and JSON. Learn to request data from servers, handle errors, and display live data in the browser.

Prerequisites:🔌DOM Connector

Why Data Fetching Matters

Understand why websites need to fetch data from servers — and how the web evolved from static pages to dynamic, real-time experiences.

JSON — The Language of Data

Learn JSON, the universal format that APIs use to send and receive structured data between browsers and servers.

Promises — Waiting for Things

Understand how JavaScript handles operations that take time using Promises — the foundation of all data fetching.

Async/Await — Cleaner Promises

Learn async/await — modern syntax that makes asynchronous code read like normal, step-by-step instructions.

Your First Fetch

Make your first real HTTP request using the Fetch API and receive live data from a public API.

Understanding Responses

Learn to read HTTP status codes, check response success, and inspect headers — essential skills for robust data fetching.

Error Handling

Learn to handle both network failures and HTTP errors gracefully so your app stays reliable.

Displaying Fetched Data in the DOM

Learn the complete pattern: fetch data from an API, parse it, and render it into the page using DOM manipulation.

POST Requests and Sending Data

Learn to send data to servers using POST requests — the same mechanism behind form submissions, creating accounts, and posting content.

Loading States and UX

Learn to manage loading, success, and error states so your users always know what's happening.

Capstone: Pokemon Explorer

Combine everything you've learned to build a Pokemon Explorer that fetches data from the PokeAPI and displays it with loading states and error handling.

Codelab: Weather Dashboard

Build a Weather Dashboard from scratch — a complete project using the free Open-Meteo API, practiced in a real code editor and browser.