Node.js & Express
Blocking vs Non-Blocking Code in Node.js: Why It Makes or Breaks Your Server
Learn how blocking code kills Node.js server performance and how non-blocking async I/O fixes it. Real file and DB examples with benchmarks.
Tagged “Async”
8 articles
Node.js & Express
Async Code in Node.js: Callbacks and Promises Explained with Real Examples
Learn why async code exists in Node.js, how callbacks work, why they fail at scale, and how Promises solve it with real, runnable examples.
JavaScript
Synchronous 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.
JavaScript
Async/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.
JavaScript
Error 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.
JavaScript
Callbacks 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.
Node.js & Express
Why Does setImmediate Sometimes Run Before setTimeout(fn, 0)?
Why setImmediate sometimes runs before setTimeout(fn, 0) in Node.js and sometimes after: the event loop phases and timer precision behind it.
JavaScript
The Chai Stall Promise System: How Hitesh Bhaiya Manages Orders
JavaScript Promises aren't complicated once you stop thinking of them abstractly.