A practical guide to the challenges and controversies of the Periodic Background Sync API - common developer mistakes, why they matter, and actionable fixes to keep your PWA performant and respectful of users' devices.
Explore the surprising outcomes caused by JavaScript's automatic type conversions. Learn the core rules, step through bizarre examples (like [] == ![] or null >= 0), and pick up practical rules to avoid bugs.
Chasing every new framework will give you short-term buzz but long-term fragility. Prioritize JavaScript fundamentals, disciplined learning, and selective adoption to build a resilient, future-proof career.
A practical guide to JavaScript lookbehind assertions: what they are, when to use them, real-world examples, browser/Node compatibility notes, and fallbacks for older environments.
A practical, example-driven guide to the Periodic Background Sync API - how it works, when to use it, code samples, browser support, security considerations, and production-ready best practices for keeping your web app data fresh while respecting battery and privacy.
Learn how to use the PerformanceObserver API to capture real, user-centric performance metrics (LCP, FCP, CLS, FID/INP, long tasks), send them for analysis, set SLOs, and iterate on improvements with code examples, percentile calculations, and real-world optimizations.
Learn how to use the File System Access API to open, read, edit, save and manage files and directories from the browser. Includes hands‑on examples, permission handling, fallbacks and best practices.