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:

Finite State Modeling: The Architecture Pattern That Eliminates Impossible States

April 15, 2026Security & Architecture

Most UI bugs are not logic errors — they are state management errors. By modeling UI states explicitly using finite state machines, you can make entire classes of bugs impossible to represent in your code before they ever reach production.

The Hidden Cost of MutationObserver: What Fires It and What Happens Next

April 14, 2026Browser Internals

MutationObserver is the standard API for watching DOM changes, but it is easy to create observers that fire far more often than expected and trigger expensive processing on every mutation. Understanding when and why it fires is essential for using it without tanking performance.

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