From the course: Master React 19 and Next.js 16 with Hands-On Projects and Real-World Applications

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React reducer review: Common mistakes and best practices

React reducer review: Common mistakes and best practices

From the course: Master React 19 and Next.js 16 with Hands-On Projects and Real-World Applications

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React reducer review: Common mistakes and best practices

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Welcome back! In this session, we're reviewing everything you learned in the React Reducer chapter. Reducers are powerful because they let you organize state logic in one place, especially when your component starts handling many different actions. Let's go step by step and review the rules, best practices, and common mistakes you want to avoid. We will use our TasksReducer example. We begin by setting up UseReducer. Instead of managing state with multiple UseState hooks, a reducer gives you a single, centralized place for all state updates. Here, Tasks holds the current state, and Dispatch is used to send actions that trigger updates. Keep this concept in mind as the foundation of all reducer logic. Next, we define the reducer itself. The reducer is a pure function. It receives the current state and an action and returns the new state without side effects. Notice the switch statement. It makes it easy to handle multiple action types. Always return a new state instead of mutating the…

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