Parsing a CSV file froze the entire UI. Web Workers run heavy computation in a separate thread, keeping the UI responsive.
A comprehensive deep dive into client-side storage. From Cookies to IndexedDB and the Cache API. We explore security best practices for JWT storage (XSS vs CSRF), performance implications of synchronous APIs, and how to build offline-first applications using Service Workers.
Clicked a button, but the parent DIV triggered too? Events bubble up like water. Understand Propagation and Delegation.
Optimizing by gut feeling made my app slower. Learn to use Performance profiler to find real bottlenecks and fix what matters.
Text to Binary (HTTP/2), TCP to UDP (HTTP/3). From single-file queueing to parallel processing. Google's QUIC protocol story.
Web Workers are a powerful tool for bypassing JavaScript's single-threaded limitation. The core structure is letting the main thread focus on UI while offloading heavy computation to separate threads.
Key Takeaways:
The CSV parsing problem ultimately boiled down to a UX question: "What do we show users while they wait?" Web Workers were one answer, and in real projects, they visibly reduced user drop-off rates. Technology is just a tool, but when used properly, it can transform the quality of experience—a lesson I've learned once again.
