Async JavaScript
How JavaScript handles work that takes time: the synchronous model first, then callbacks, Promises, async/await and error handling.
5 parts · about 20 minutes of reading
- Part 1Synchronous vs Asynchronous JavaScript: How the Language Actually Executes Code
How JavaScript runs one thing at a time, and how asynchronous code hands off slow work like API calls and timers without freezing the page.
Apr 22, 2026 · 5 min read - Part 2Callbacks in JavaScript: Why They Exist
Why callbacks exist in JavaScript, how they work with async code like timers and file reads, and where nesting them starts to hurt.
Mar 20, 2026 · 5 min read - Part 3The Chai Stall Promise System: How Hitesh Bhaiya Manages Orders
JavaScript Promises aren't complicated once you stop thinking of them abstractly.
Mar 1, 2026 · 4 min read - Part 4Async/Await in JavaScript: Writing Cleaner Asynchronous Code
Async/await is syntax over Promises that makes async code read top to bottom. How it works, error handling with try/catch, and parallel calls with Promise.all.
Apr 22, 2026 · 3 min read - Part 5Error Handling in JavaScript: Try, Catch, Finally
Learn how structured error handling in JavaScript turns crashes into recoverable moments with real code, clear patterns, and zero fluff.
Apr 8, 2026 · 3 min read