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 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 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 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 the previous state in React can lead to inconsistent or incorrect UI updates, especially when the new state depends on the current….
Proper Object State Updates in React When updating state objects in React, it’s crucial to create new object references rather than mutating existing ones. Here’s how to handle object state….
Mutating props inside a child component in React is a common mistake that can lead to unpredictable behavior, bugs, and issues with React’s unidirectional data flow. Props are meant to….
Avoiding Infinite Loops from State Updates in Render A critical React mistake is calling state update functions (like setState or state setters from useState) inside the render() method or function….
Proper State Management in React Components A critical React anti-pattern is modifying state directly rather than using the proper state update methods. Here’s how to handle state correctly in both….
Understanding super(props) and State Initialization in Class Components A common React anti-pattern is trying to access this.state before calling super(props) in a class component constructor. Here’s what you need to….
