92 items
useState Hook Basics
Code QuizContext Performance Pitfalls & Re-renders
Slides / VideouseEffect for Side Effects
QuizContext Provider Re-render Pitfalls
QuizContext API for Shared State
QuizuseContext Hook Consumption
QuizuseState vs useReducer
QuizuseReducer for Complex Logic
QuizMemoizing Derived Values
QuizuseState Hook Fundamentals
QuizAvoiding Unnecessary Re-renders
QuizImmutable State Updates
QuizFunctional Updates with Previous State
QuizLifting State Up
QuizState Updates Are Asynchronous
QuizRedux Toolkit Slices
QuizPersisting State with AsyncStorage
QuizState vs Props Distinction
QuizuseRef for Mutable State
QuizPreserving and Resetting State
QuizControlled TextInput State
QuizGlobal State Libraries Overview
QuizManaging Derived State
QuizRedux Core Concepts
QuizCreating and Providing Context
Slides / VideouseContext Hook Basics
Slides / VideoContext API for Global State
Slides / VideoThe Prop Drilling Problem
Slides / VideoLifting State Up to Share Between Components
Slides / VideouseReducer for Complex State Logic
Slides / VideouseState Hook for Local Component State
Slides / VideoCustom Hooks for Reusable Stateful Logic
Slides / VideouseEffect for Syncing State with Side Effects
Slides / VideoPersisting State with AsyncStorage
Slides / VideoAsync State & Data Fetching Patterns
Slides / VideoChoosing Local, Context, or External Store
Slides / VideoZustand as a Lightweight State Library
Slides / VideouseSelector & useDispatch Hooks
Slides / VideoActions, Reducers, and Dispatch
Slides / VideoBatching of State Updates
Code QuizDerived State from Props
Code QuizLifting State Up
Code QuizLazy Initial State
Code QuizUpdating Array State
Code QuizContext API for Global State
Code QuizDispatching Actions
Code QuizPassing Setters as Callbacks
Code QuizUpdating Object State
Code QuizMultiple vs Single State Object
Code QuizuseContext Hook Consumption
Code QuizuseMemo for Derived Values
Code QuizPassing State Down via Props
Code QuizuseReducer for Complex State
Code QuizStale Closure in Updates
Code QuizuseCallback for Stable Handlers
Code QuizContext Provider Value Setup
Code QuizFunctional State Updates
Code QuizuseEffect for State Sync
Code QuizuseRef for Non-Rendering State
Code QuizRedux Toolkit for Simplified Setup
Slides / VideoRedux Fundamentals & Store Concept
Slides / VideoFunctional Updates with Previous State
Slides / VideoCreating and Consuming Context
FlashcardPersisting State with AsyncStorage
FlashcardRedux Persist Rehydration
FlashcardState vs Props
FlashcardProvider Placement and Composition
FlashcardContext API for Global State
FlashcarduseReducer for Complex State
FlashcarduseSelector and useDispatch
FlashcardDerived State and Selectors
FlashcardAvoiding Stale Closures
FlashcardSharing State Across Screens
FlashcardServer State with React Query
FlashcardChoosing State Scope
FlashcardAsync Updates with useEffect
FlashcardMobX Observable State
FlashcardCustom Hooks for Stateful Logic
FlashcardZustand Lightweight State
FlashcardRedux Core Concepts
FlashcardBatching of State Updates
FlashcardRecoil and Jotai Atoms
FlashcardFunctional Updates
FlashcardImmutability When Updating State
FlashcardRedux Toolkit Setup
FlashcardContext Performance Pitfalls
FlashcardProp Drilling Problem
FlashcarduseRef for Mutable State
FlashcardLifting State Up
FlashcardImmutability in State Updates
Slides / VideoState vs Props Distinction
Slides / VideouseRef for Non-Rendering State
Slides / VideouseEffect for State Sync
A missing dependency stops the effect from re-syncing.
function Profile({ userId }) {
const [name, setName] = useState('');
useEffect(() => {
fetchUser(userId).then(u => setName(u.name));
}, []);
return <Text>{name}</Text>;
}What is the bug in this code?