Using useRef to store values but expecting re-renders
A common misconception in React is expecting components to re-render when values stored in useRef change. This misunderstanding can lead to bugs where UI doesn’t update as expected. The Core….
Tag: useState
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:….
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….
Modifying state directly instead of using setState()
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….
Accessing state immediately after setState() before it updates
A common React pitfall is trying to access an updated state value immediately after calling setState or the state setter from useState. This doesn’t work because state updates are asynchronous….
Using useState but forgetting to initialize it with a default value
Forgetting to Initialize useState with a Default Value A common React mistake is declaring state with useState but forgetting to provide an initial value, which can lead to undefined errors….
Using hooks inside class components
A fundamental limitation of React is that hooks cannot be used inside class components. This is a deliberate design choice by the React team, as hooks were created specifically for….
Trying to set a state variable outside the component function
Trying to Set State Outside a React Component A common React mistake is attempting to modify state variables outside their component function. This violates React’s fundamental principles and will not….
Using useRef to store values but expecting re-renders
Understanding useRef and Component Re-renders A common misconception in React is expecting a component to re-render when a useRef value changes. This doesn’t happen because refs are designed specifically to….
Infinite loop in useEffect due to incorrect dependencies
An infinite loop in useEffect due to incorrect dependencies occurs when the dependencies in the dependency array of useEffect cause the effect to re-run indefinitely. This happens because the state….