Advanced React JS Concepts: A Deep Dive
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React.js is a cornerstone of modern web development, and while its basics are relatively straightforward, mastering its advanced concepts can open up a world of possibilities. This blog explores advanced React concepts to help you build efficient and scalable applications.
1. Advanced Hooks
1.1 useReducer for State Management
const initialState = { count: 0 }
function reducer(state, action) {
switch (action.type) {
case 'increment':
return { count: state.count + 1 }
case 'decrement':
return { count: state.count - 1 }
default:
throw new Error()
}
}
function Counter() {
const [state, dispatch] = useReducer(reducer, initialState)
return (
<>
<p>Count: {state.count}</p>
<button onClick={() => dispatch({ type: 'increment' })}>+</button>
<button onClick={() => dispatch({ type: 'decrement' })}>-</button>
</>
)
}
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