4 minbeginner
Debounce vs Throttle — One Sentence to Remember Forever
Two patterns for taming fast events: debounce waits for silence, throttle limits how often. With examples, code, and interview answers.
Bite-sized JavaScript, React & Next.js tips.
Short posts with code and diagrams. Readable in minutes.
5 minbeginner
?? vs || — The Default-Value Trap That Breaks Real Apps
`||` treats 0 and '' as missing. `??` only treats null/undefined as missing. Know the difference before it bites you in an interview or in prod.
3 min
JavaScript Generators & Iterators — Lazy Sequences Explained
Generators let you produce values on demand instead of all at once. Learn how iterators and generator functions work, and when to reach for them.
1 minintermediate
queueMicrotask Explained: The Smallest Async Queue in JavaScript
What queueMicrotask does, how it differs from Promise.then, and how microtasks really work under the hood.
3 minintermediate
Why async/await Doesn’t Make JavaScript Code Parallel
Async/await feels like parallel code, but it isn’t. Here’s why JavaScript is still single-threaded and how async really works.
2 minintermediate
How Promise.all Works in a Single-Threaded JavaScript World
If JavaScript is single-threaded, how can Promise.all handle multiple requests at the same time? A deep dive into the event loop and async I/O.
3 minintermediate
Promise APIs Compared: all vs race vs any vs allSettled
A practical and conceptual comparison of Promise.all, Promise.race, Promise.any, and Promise.allSettled.
3 minintermediate
Web Workers Explained for Frontend Developers
How Web Workers work, why they matter, and when to use them to achieve real parallelism in frontend apps.