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:

The Stale Closure Problem in React Hooks

Rendering & Frameworks

Stale closures are one of the most common and confusing sources of bugs in React hooks. They occur when a function captures a variable at the time it was created and does not see later updates — resulting in logic that operates on outdated state or props.

Memoization Pitfalls in React: When useMemo and useCallback Make Things Worse

Rendering & Frameworks

Memoization in React is a performance optimization, not a default behavior. But many codebases use useMemo and useCallback everywhere — creating overhead, obscuring intent, and sometimes preventing the optimizations they were meant to enable. Knowing when memoization helps and when it hurts is more important than knowing the API.