Using hooks inside class components
React Hooks were designed specifically for function components and cannot be used directly inside class components. This is a fundamental constraint of React’s architecture. Here’s what you need to know:….
Tag: React development
Not using useCallback when passing event handlers to child components
The Importance of useCallback for Event Handlers in Child Components When passing event handlers to child components in React, failing to use useCallback can lead to performance issues. Here’s what….
Listening to window events without cleaning them up
A particularly insidious type of memory leak occurs when you add event listeners to the window object but fail to remove them when your React component unmounts. Here’s what you….
Forgetting to remove event listeners on unmount
A common memory leak issue in React occurs when event listeners aren’t properly removed when components unmount. Here’s how to handle this correctly: The Problem When you add event listeners….
Not handling right-click (contextmenu) events properly
Properly handling right-click events (contextmenu) in React requires understanding both the event system and browser behavior. Here’s a comprehensive guide to avoid common pitfalls: Basic Right-Click Handling Standard Context Menu….
Accessing event.target.value after an asynchronous call (SyntheticEvent is nullified)
In React, when handling events like onChange or onClick, the SyntheticEvent object is pooled for performance reasons—meaning it gets nullified after the event handler finishes. If you try to access….
Passing a function as a prop but forgetting to bind it in class components
Passing a function as a prop without binding it in class components in React can lead to issues where the this keyword doesn’t refer to the correct context, causing errors….
Forgetting default state values in functional components
Forgetting to set default state values in functional components can lead to unexpected behavior, runtime errors, or undefined values in your React app. This issue often occurs when using the….
Using state updates inside a loop without batching
Using state updates inside a loop without batching in React can lead to performance issues, unexpected UI behavior, and inefficient rendering. React’s setState is asynchronous and batches updates for performance…..
Calling setState() with a function but not using previous state
Calling setState() with a function but not using the previous state in React can lead to inconsistent or incorrect UI updates, especially when the new state depends on the current….