Asynchronous JavaScript

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#1 What is Asynchronous JavaScript?

Understand what asynchronous code means, how JavaScript's single-threaded event loop works, and why async patterns are essential for modern web development.

#2 AJAX Requests

Learn how to make asynchronous HTTP requests using XMLHttpRequest (AJAX) — the original technique for fetching data from a server without reloading the page.

#3 Callback Functions

Understand callback functions — how they work, how to use them for async operations, and the problem of callback hell.

#4 Promises

Master JavaScript Promises — create, chain, and handle errors with .then(), .catch(), and .finally() to write clean asynchronous code.

#5 Generators

Learn about JavaScript generator functions — pausable functions that use function* and yield for elegant control flow and async patterns.