AlexWebLab

Explore a wide range of web development topics, from JavaScript to React and beyond, and uncover valuable insights to enhance your skills.

Latest 2 articles:

Optimistic UI Rollback: How to Update Instantly and Handle Failures Gracefully

Security & Architecture

Optimistic UI dramatically improves perceived performance by applying state changes before the server confirms them. But this requires a robust rollback strategy for when the server rejects the change — and getting rollbacks right is where most implementations fall short.

Cumulative Layout Shift: Why Your Page Jumps and How to Stop It

Performance

Cumulative Layout Shift measures visual instability — the total amount of unexpected layout movement that occurs during a page's lifetime. A high CLS score means elements shift under the user's cursor right as they try to click. It is one of the most impactful Core Web Vitals for perceived quality.