React Hooks Deep Dive: Part 2 - useContext and useReducer

Welcome to Part 2 of our React Hooks series! Today we’ll explore useContext and useReducer for more advanced state management scenarios.

useContext Hook

The useContext hook allows you to consume context values without prop drilling:

TypeScript

import { createContext, useContext }

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useReducer Hook

useReducer is like useState but for complex state logic:

TypeScript

import { useReducer } from 'react';
 
function reducer(state, action) {
  switch (action.type) {
    case 'increment':
      return { count: state.count + 1 };
    case 'decrement':
      return { count: state.count - 1 };
    default:
      return state;
  }
}
 
function Counter() {
  const [state, dispatch] = useReducer(reducer, { count: 0 });
 
  return (
    <div>
      <p>Count: {state.count}</p>
      <button onClick={() => dispatch({ type: 'increment' })}>+</button>
      <button onClick={() => dispatch({ type: 'decrement' })}>-</button>
    </div>
  );
}

Benefits

Predictable state updates
Easier to test
Better for complex state logic

React Hooks Deep Dive: Part 2 - useContext and useReducer

useContext Hook

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When to Use

useReducer Hook

Benefits

Next Steps

React Hooks Deep Dive: Part 1 - useState and useEffect

React Hooks Deep Dive: Part 2 - useContext and useReducer