Hey developers, in this tutorial you will learn everything about all the React hooks, what they are, how to use them, when to use them, and which hook should be used in which type of project. Along with this, we will explain what are the advantages of React hooks, what are the rules of hooks, and best practices.
In React, we use a component-based structure. A component is like a building block of code that can be used independently and repeatedly. There are two main types of components: class components and functional components.
Before React 16.8, we mainly used class components for managing state and other advanced features. But now React Hooks has arrived, which has completely changed the game. Now, with Hooks, we can easily handle state and other React features within functional components.
So let's start learning about React Hooks.
Table of contents:
- What are React Hooks?
- Basic Hooks
- Additional Hooks
- Custom Hooks
- Which hook should be used when and in which type of project?
- What are the advantages of using the Hook?
- Rules of React Hooks
- Best Practices for React Hooks
What are React Hooks?
A React Hook is a special function that allows you to use state and other React features in functional components. It means that you can manage state, handle side effects, and use context within your components quite easily and clearly. It is easier to reuse logic with React Hooks since they avoid complex class components.
To understand with a simple example, using class components to manage things like the current input value or a list of tasks requires us to write more and complex code. However, React provides hooks to achieve this in an easy and optimized way. Hooks are very useful because they let us handle state, side effects (like fetching data), and other React functionalities without needing class components, making our development process much simpler.
When you use React Hooks, don't overthink it. Just remember, hooks are special functions in React that allow you to "hook into" React state and side effects from functional components.
Basic Hooks
In React, we often find some basic hooks that are really important. However, apart from these, there are other hooks that we may need for certain tasks. Here are the most used hooks in React:
- useState
- useEffect
- useContext
1. useState
The useState hook manages the state, providing both the current state and a function to update it. It's like keeping an eye on how things change in our app.
const [state, setState] = useState(initialState);
Use Cases: When you need to track and update the state within a component, such as managing form inputs or toggling a UI element.
Example:
import React, { useState } from 'react';
function App() {
const [count, setCount] = useState(0);
return (
<div>
<p>You clicked {count} times</p>
<button onClick={() => setCount(count + 1)}>
Click me
</button>
</div>
);
}
export default App;
2. useEffect
The useEffect hook manages side effects such as API calls, timers, subscriptions, and more. This hook triggers once your component is mounted. This helps prevent side effects from affecting our initial rendering of the component.
useEffect(() => {
// Effect logic
}, [dependencies]);
Use Cases: When you need to perform actions after rendering a component, such as fetching data or updating the UI based on state changes.
Example:
import React, { useState, useEffect } from 'react';
function App() {
const [postData, setPostData] = useState(null);
useEffect(() => {
// Fetch some dummy text from JSONPlaceholder API
fetch('https://jsonplaceholder.typicode.com/posts/1')
.then(response => response.json())
.then(data => setPostData(data.id))
.catch(error => console.error(error));
}, []);
return (
<div>
<p> UserId: {postData}</p>
</div >
);
}
export default App;
3. useContext
The useContext hook enables access to context values, allowing components to share global information. This helps to easily access the states and props of components at a different level.
const value = useContext(MyContext);
Use Cases: When you want to keep your states persistent across your app and access them at any level in the component without prop drilling.
Example:
import { createContext, useContext } from 'react';
// Create a context
const ThemeContext = createContext('light');
function App() {
const theme = useContext(ThemeContext);
return (
<div>
<p>Current Theme: {theme}</p>
</div>
);
}
export default App;
Additional Hooks
Initially in React, we play around basic hooks to perform basic tasks, but as we go a long way, we encounter more complex tasks. This is where React additional hooks step in. Using these hooks we can easily achieve more complex functionality.
Here are a few additional Hooks:
- useReducer
- useCallback
- useMemo
- useRef
- useImperativeHandle
- useLayoutEffect
- useDebugValue
1. useReducer
The useReducer hook handles complex state logic using reducers. It's similar and alternative to useState but for managing even complicated state situations.
const [state, dispatch] = useReducer(reducer, initialState, init);
Use Cases: When you have complex state logic or multiple state transitions, such as managing form state or complex user interactions.
Example:
import { useReducer } from 'react';
// Initial State
const initialState = { count: 0 };
// Reducer function
const 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, initialState);
return (
<div>
<p>Count: {state.count}</p>
<button onClick={() => dispatch({ type: 'INCREMENT' })}>Increment</button>
<button onClick={() => dispatch({ type: 'DECREMENT' })}>Decrement</button>
</div>
);
}
export default Counter;
In this example, useReducer is used to manage complex state logic for a counter component.
2. useCallback
The useCallback hook is used to memoize callback functions, preventing unnecessary re-renders. It returns a memoized version of the callback function that only changes if one of the dependencies has changed
const memoizedCallback = useCallback(() => {
// Function logic
}, [dependencies]);
Use Cases: When you pass callbacks to child components and want to avoid unnecessary renders.
Example:
import { useState, useCallback, useEffect } from 'react';
const items = [
{ id: 1, name: 'Item 1', category: 'A' },
{ id: 2, name: 'Item 2', category: 'B' },
{ id: 3, name: 'Item 3', category: 'A' },
];
function App() {
const [selectedCategory, setSelectedCategory] = useState('');
const [filteredItems, setFilteredItems] = useState(items);
const handleCategoryChange = (event) => {
setSelectedCategory(event.target.value);
};
const filterItems = useCallback(() => {
const filtered = selectedCategory ? items.filter((item) => item.category === selectedCategory) : items;
setFilteredItems(filtered);
}, [selectedCategory]);
useEffect(() => {
filterItems();
}, [filterItems]);
return (
<div>
<select onChange={handleCategoryChange} value={selectedCategory}>
<option value="">All</option>
<option value="A">Category A</option>
<option value="B">Category B</option>
</select>
<ul>
{filteredItems.map((item) => (
<li key={item.id}>{item.name}</li>
))}
</ul>
</div>
);
}
export default App;
The useCallback hook memoizes the filterItems function, so it only changes if selectedCategory changes. So, the app is more efficient, as there are fewer unnecessary re-renders and recalculations. By memoizing filterItems, the useEffect hook only runs when filterItems changes, which happens only when selectedCategory changes.
3. useMemo
The useMemo hook is used to memoize values to avoid unnecessary recalculations on every render.
const memoizedValue = useMemo(() => expensiveComputation(inputs), [inputs]);
Use Cases: You can use the useMemo hook when you have a costly calculation or data fetching operation that depends on some inputs, and you want to avoid re-running that operation unnecessarily.
Example:
import { useState, useMemo, useEffect } from 'react';
function App() {
const [count, setCount] = useState(0);
const [data, setData] = useState(null);
const [loading, setLoading] = useState(false); // Track loading state
// Function to fetch data asynchronously
const fetchData = async () => {
console.log('Fetching data...'); // Logging message indicating the start of the data fetching operation
setLoading(true); // Set loading state to true
await new Promise((resolve) => setTimeout(resolve, 1000)); // Simulate delay
const result = 'Fetched Data';
setLoading(false); // Set loading state to false after fetching data
return result;
};
// Memoize the fetched data based on the count state
const memoizedData = useMemo(() => fetchData(), [count]);
// Effect to update the data state when the memoizedData promise resolves
useEffect(() => {
memoizedData.then((resolvedData) => setData(resolvedData)); // Update data with resolved value
}, [memoizedData]); // Re-run effect only when memoizedData changes (when data is resolved)
// Function to handle button click and increment count state
const handleClick = () => {
setCount(count + 1);
};
return (
<div>
<h1>Count: {count}</h1>
<button onClick={handleClick}>Increment</button>
{loading ? (
<p>Loading...</p>
) : (
<p>Data: {data}</p>
)}
</div>
);
}
export default App;
In this example, the useMemo hook is used to optimize performance by memoizing the result of the fetchData function. The fetchData function runs only when the count state changes otherwise it'll return the cached result from the previous render.
4. useRef
The useRef hook creates a mutable reference that persists across renders. It returns a ref object with a property called current, which can be used to hold a value between renders without causing re-renders. This ref object is mutable and is mainly used to access a child component imperatively, allowing you to interact with the component directly.
const myRef = useRef(initialValue);
Use Cases: The useRef hook is useful in several scenarios: You can attach a ref to a DOM element using the ref attribute and access it directly with ref.current for imperative DOM manipulation or third-party libraries. You can store values in ref.current that change without causing re-renders, which is helpful for keeping track of previous state values, timers, or animation frames. Additionally, you can manage focus on form elements by assigning the ref to the element and using ref.current.focus() to focus it imperatively.
Example:
import { useRef, useState, useEffect } from 'react';
function App() {
const [count, setCount] = useState(0); // State to trigger re-renders
const inputRef = useRef(null); // Ref to access the input element
const mutableCountRef = useRef(0); // Ref to store a mutable value that doesn't trigger re-renders
const timerRef = useRef(null); // Ref to store a timer ID
// Function to handle button click and increment count
const handleClick = () => {
mutableCountRef.current += 1; // Update the mutable count value
setCount(mutableCountRef.current); // Update the state to reflect the change on UI
};
// Function to handle input focus
const focusInput = () => {
inputRef.current.focus(); // Focus the input element imperatively
};
// Function to start a timer
const startTimer = () => {
if (timerRef.current) return; // Prevent multiple timers
timerRef.current = setInterval(() => {
mutableCountRef.current += 1;
setCount(mutableCountRef.current);
console.log('Timer tick:', mutableCountRef.current);
}, 500);
};
// Function to stop the timer
const stopTimer = () => {
clearInterval(timerRef.current);
timerRef.current = null;
};
// Automatically focus the input element when the component mounts
useEffect(() => {
focusInput();
return () => stopTimer(); // Clean up timer on unmount
}, []);
return (
<div>
<h1>Count: {count}</h1>
<button onClick={handleClick}>Increment</button>
<input ref={inputRef} type="text" placeholder="Focus on me!" />
<button onClick={focusInput}>Focus Input</button>
<button onClick={startTimer}>Start Timer</button>
<button onClick={stopTimer}>Stop Timer</button>
</div>
);
}
export default App;
5. useImperativeHandle
The useImperativeHandle hook lets you tweak the value exposed by a ref. It's like tailoring what a parent can do with a child component. You often pair it with forwardRef to fine-tune the methods or properties a parent can use on a child. It's like giving the parent a special set of keys to access specific parts of the child component, making communication between them more precise and efficient.
useImperativeHandle(ref, createHandle, [dependencies])
Use Cases: useImperativeHandle hook lets you customize what methods or properties a parent component can access on a child component. This allows us to create a controlled interface to interact with the functionality of the child component.
For example, you can use it to expose imperative methods for form validation, submission, or other actions from a child form component to its parent.
Example:
import { useRef, useImperativeHandle, forwardRef } from 'react';
// Child component
const ChildComponent = forwardRef((props, ref) => {
// Ref for the input element
const inputRef = useRef();
// Function to focus the input element imperatively
const focusInput = () => {
inputRef.current.focus();
};
// Expose the focusInput method to the parent component
useImperativeHandle(ref, () => ({
focus: focusInput
}));
return <input ref={inputRef} />;
});
// Parent component
const ParentComponent = () => {
// Ref to hold child component's imperative methods
const childRef = useRef();
// Function to focus the input element in the child component
const handleFocus = () => {
childRef.current.focus();
};
return (
<div>
<button onClick={handleFocus}>Focus Child Input</button>
<ChildComponent ref={childRef} />
</div>
);
};
export default ParentComponent;
6. useLayoutEffect
The useLayoutEffect hook is similar to useEffect, but it fires synchronously after all DOM mutations. This makes it suitable for operations demanding precise measurement or adjustment of the DOM layout.
Important: Remember, it might slow down your app a bit. So, unless you need it, stick with useEffect.
useLayoutEffect(() => {
// Synchronous side effect logic
}, [dependencies]);
Use Cases: Use useLayoutEffect when you need to make immediate changes to the DOM that affect its layout, like measuring elements or updating layout-dependent logic. It ensures layout changes are correct before appearing on screen. For example, you can use it to measure the dimensions of a resizable div element.
Example:
import { useRef, useState, useLayoutEffect } from 'react';
// Child component
const ChildComponent = ({ onResize }) => {
// Ref for the div element
const divRef = useRef();
// Function to measure the dimensions of the div element
const measureDimensions = () => {
const { width, height } = divRef.current.getBoundingClientRect();
onResize({ width, height });
};
// Invoke the measureDimensions function on mount and resize
useLayoutEffect(() => {
measureDimensions();
const handleResize = () => {
measureDimensions();
};
window.addEventListener('resize', handleResize);
return () => {
window.removeEventListener('resize', handleResize);
};
}, []); // Run only on mount and unmount
return <div ref={divRef}>Resizable Div</div>;
};
// Parent component
const ParentComponent = () => {
// State to store dimensions received from the child component
const [dimensions, setDimensions] = useState({ width: 0, height: 0 });
// Function to handle resize events from the child component
const handleResize = (dimensions) => {
setDimensions(dimensions);
};
return (
<div>
<ChildComponent onResize={handleResize} />
<p>Width: {dimensions.width}px</p>
<p>Height: {dimensions.height}px</p>
</div>
);
};
export default ParentComponent;
7. useDebugValue
The useDebugValue hook is like giving your custom hook a name tag in React DevTools. It adds a label so you can easily recognize what the hook is doing when you're working on your React project.
Imagine you're exploring a maze, and each hook is a different path. With useDebugValue, you can leave little signposts along the way, like "This way for state tracking" or "Watch out for infinite loops!" These signposts, or debug values, make it easier to navigate through your code maze.
So, when you're using React DevTools to inspect your app, useDebugValue gives you these handy hints to understand what each custom hook is doing. It's like having a friendly guide to show you around the hidden corners of your code!
Important: Remember, useDebugValue is purely for development purposes and does not affect the actual behavior of your application.
useDebugValue(value, [formatter])
Use Cases: You can use useDebugValue when you want to provide additional context or information about a custom hook for debugging purposes. Debugging can be made easier by labeling hooks with descriptive messages displaying dynamic values.
Example:
import { useState, useDebugValue } from 'react';
function useFriendStatus(initialStatus = 'Offline') {
const [status, setStatus] = useState(initialStatus);
const changeStatus = (newStatus) => setStatus(newStatus);
// Display a descriptive label and current status in DevTools
useDebugValue(() => ({
status, // Display the current status
changeStatus, // Expose the changeStatus function for inspection
}), 'Friend Status'); // Label the custom hook
return { status, changeStatus };
}
function App() {
const { status, changeStatus } = useFriendStatus();
return (
<div>
<h1>Friend Status: {status}</h1>
<button onClick={() => changeStatus('Online')}>Go Online</button>
<button onClick={() => changeStatus('Busy')}>Set Busy</button>
</div>
);
}
export default App;
Custom Hooks
React provides an option to create our own custom hook for performing certain task. Custom hooks allow us to do repetitive tasks just once and reuse them wherever needed. This makes things simpler and cleaner for anyone reading your code. So, When a piece of code is reused multiple times, think about making a custom hook to save time and effort.
Example:
Imagine you're creating an e-commerce website where users can put items in their carts. Instead of dealing with the cart's inner workings in each component, you make a custom hook named useShoppingCart. This hook takes care of managing the cart's state, offers functions to add and remove items, and lets you see the cart's details for debugging. Then, in your App component, you just employ this custom hook to manage the shopping cart.
import React, { useState, useDebugValue } from 'react';
function useShoppingCart() {
const [cart, setCart] = useState([]);
const addItem = (item, quantity = 1) => {
const existingIndex = cart.findIndex((cartItem) => cartItem.item === item);
if (existingIndex !== -1) {
const updatedCart = [...cart];
updatedCart[existingIndex].quantity += quantity;
setCart(updatedCart);
} else {
setCart([...cart, { item, quantity }]);
}
};
const removeItem = (item) => {
setCart(cart.filter((cartItem) => cartItem.item !== item));
};
// Display cart details and functions in DevTools
useDebugValue(() => ({
cart, // Display the current cart items and quantities
addItem, // Expose the addItem function for inspection
removeItem, // Expose the removeItem function for inspection
}), 'Shopping Cart'); // Label the custom hook
return { cart, addItem, removeItem };
}
function App() {
const { cart, addItem, removeItem } = useShoppingCart();
return (
<div>
<h1>Shopping Cart</h1>
{cart.map((item) => (
<div key={item.item}>
{item.item} (Quantity: {item.quantity})
<button onClick={() => removeItem(item.item)}>Remove</button>
</div>
))}
<button onClick={() => addItem('Product A')}>Add Product A</button>
</div>
);
}
export default App;
In short, a custom hook in React is a way to reuse stateful logic across multiple components. Whenever you need logic to be used in multiple places, such as fetching data or managing forms, you should use custom hooks.
Which hook should be used when and in which type of project?
Many developers have this question in their mind "Which hook should be used when and in which type of project?" Keeping this in mind, we have covered below which hook should be used when and in which type of project.
useState:
You can use the useState hook to manage the local state, as well as to manage form inputs, show or hide modals, or keep track of counters.
With the useState hook, you can make a to-do list app that tracks each task's status (completed or not) and keeps a list of all your tasks.
useEffect:
Use useEffect to perform side effects, such as fetching data, setting up subscriptions, or manually changing the DOM. It runs after every render by default but you can customize it to run less frequently.
With the help of useEffect hook, you can create a weather app that gets weather data from an API and updates the UI when the location input changes.
useContext:
You can use useContext hook to manage a global state or shared data without having to pass props through the component tree manually. For themes, authentication states, or user settings, this is useful.
You can create a theme switcher for a blog website where the theme (light or dark) can be toggled and accessed by any component in the app with the help of useContext hook.
useReducer:
When handling more complex state logic, or when the state depends on its previous values, the useReducer hook is very useful. While it is similar to the useState hook, but the useReducer hook leverages reducer functions, making it easier to manage intricate state changes.
For example, with the useReducer hook, you can create a shopping cart application that manages the cart's state. This includes adding or deleting items from the cart, and updating the quantities of items, all in a straightforward and efficient manner.
useCallback:
The useCallback hook is useful for memoizing functions to prevent unnecessary re-renders, especially when passing callbacks to child components.
You can use useCallback hook, for building performance-sensitive apps, like data visualization dashboards, that need to minimize re-renders for excellent performance.
useMemo:
You can use useMemo hook for big complicated calculations so they are not recalculated on every render. With this hook, your app will run more efficiently because unnecessary work will be avoided.
The useMemo hook allows you to implement a big data table that performs complex filtering and sorting operations, ensuring that these operations are recalculated only when needed.
useRef:
The useRef hook offers a versatile solution for accessing and manipulating DOM elements directly, storing variable values that remain unaffected by re-renders, or maintaining values across renders.
You can utilize the useRef hook to craft a form with custom validation requirements. This becomes handy when you need to dynamically set focus on an input field or monitor the previous value of an input, providing a seamless user experience.
useImperativeHandle:
The useImperativeHandle hook can be used to customize the instance value that is displayed when using ref in a parent component. If you are creating a library of reusable components, this will be useful.
With the help of this useImperativeHandle hook, you can create a custom modal component library where parent components need to control the open/closed state imperatively.
useLayoutEffect:
You can use useLayoutEffect hook to read the layout from the DOM and re-render synchronously. This hook is similar to the useEffect hook but fires synchronously after all DOM mutations. But remember as I told you earlier it might slow down your app a bit. So, unless you need it, stick with useEffect.
With the help of useLayoutEffect hook, you can develop a complex animation component where you need to measure and modify the DOM before the browser repaints.
useDebugValue:
With the useDebugValue hook, custom hook labels can be displayed in React DevTools, making debugging custom hook logic easier.
Using useDebugValue, you are able to create custom hooks that supply helpful debug information in React DevTools, making it easier to troubleshoot and understand them.
Custom hook:
Creating custom hooks is a smart approach to extract and reuse stateful logic among different components. This helps keep your code DRY (Don't Repeat Yourself).
For example, let's say you're building a "Task Manager" application. Developing a custom hook specifically for managing form inputs would greatly simplify your workflow. This hook could efficiently handle tasks like input changes, validation checks, and resetting the form, ensuring a consistent user experience throughout your application.
Important: We’ve given you examples of how to use each hook in specific projects, but that doesn't mean you’re limited to just those projects. You can use any hook in various projects.
What are the advantages of using the Hook?
This is what your app may look like with or without using hooks. **Trying to be funny 😄**.
Simplified Logic Reuse: Hooks offers a simplified approach to reusing logic by allowing you to extract and reuse state management logic from components, all without having to use nested components or higher-order components.
Improved Readability: With hooks, you can organize related code in one place, which makes it easier to grasp and maintain your code. In this way, codebases can be read and managed more easily.
Avoidance of Class Boilerplate: With Hooks, you can use state and other React features in functional components without the need for classes. This reduces the amount of boilerplate code typically associated with class components.
Enhanced Functional Components: Hooks give functional components the ability to manage local state, side effects, context, and more. This means they're just as strong as class components, but they're easier to write and understand.
Reduced Prop drilling: Instead of passing props down multiple component levels, Hooks makes it simpler to send data down the component tree. This can make your code cleaner and avoid the need for too much prop drilling.
To understand the benefits of React Hooks, I will create a counter tracking app in which we can add, remove, and reset the number. We'll create the same app in two ways: first, without using hooks (class component), and then using Hooks (functional components). This comparison will help you to understand its benefits perfectly.
Example: Without using hooks (class component)
import { Component } from 'react';
class CounterApp extends Component {
constructor(props) {
super(props);
this.state = { count: 0 };
}
incrementCounter = () => {
this.setState(prevState => ({ count: prevState.count + 1 }));
}
decrementCounter = () => {
this.setState(prevState => ({ count: prevState.count - 1 }));
}
resetCounter = () => {
this.setState({ count: 0 });
}
render() {
const { count } = this.state;
return (
<div>
<h1>Counter: {count}</h1>
<button onClick={this.incrementCounter}>Increment</button>
<button onClick={this.decrementCounter}>Decrement</button>
<button onClick={this.resetCounter}>Reset</button>
</div>
);
}
}
export default CounterApp;
Example: Using Hooks (functional components)
import { useState } from 'react';
const CounterApp = () => {
const [count, setCount] = useState(0);
const incrementCounter = () => { setCount(count + 1); }
const decrementCounter = () => { setCount(count - 1); }
const resetCounter = () => { setCount(0); }
return (
<div>
<h1>Counter: {count}</h1>
<button onClick={incrementCounter}>Increment</button>
<button onClick={decrementCounter}>Decrement</button>
<button onClick={resetCounter}>Reset</button>
</div>
);
}
export default CounterApp;
As you can see, we saved some lines of code when we did the same project using React hooks, and the entire code is readable and easier to manage. React hooks have great readability, it's really helpful for us when we are working on larger projects.
Rules of React Hooks
Use Hooks Only Inside React Function Components: React hooks can only be used inside a local scope of a functional component. You can not call them inside any callback or regular function.
Call Hooks Only at the Top Level of a Component: Make sure to always place hooks at the top level of your functional component. Avoid putting hooks inside loops, if statements, or other functions. React relies on knowing the order of hooks to properly render your component.
Maintain the Same Order of Hook Calls on Every Render: The order in which you call Hooks matters. Ensure that Hooks are called in the same sequence on every render. Changing the order can lead to unexpected behavior, as React relies on the order to match Hook calls with their states.
Name of the Hook must start with 'use': When you're creating a custom hooks, the function name must starts with "use" to follow the naming rule and to have an access to a native hooks-like functionality in React.
Best Practices for React Hooks
Use Hooks only at the top level of functional components as we told earlier. Avoid using them inside nested functions, loops, or conditions. Hooks are not allowed in class components.
Enhancing Efficiency: Utilize useMemo() and useCallback() to optimize performance by caching expensive computations and callback functions, reducing unnecessary re-renders.
Managing Side Effects: Employ useEffect() for executing side effects like DOM manipulation, data fetching, and subscriptions. For pre-layout updates, use useLayoutEffect().
Optimizing Re-renders: Use useMemo() and useCallback() to prevent unnecessary re-renders caused by costly computations or functions, enhancing performance.
Code Reusability: Extract reusable logic into custom Hooks to promote code reusability and maintainability, encapsulating complex logic for sharing across multiple components.
Dependency Management: In useEffect, include all dependencies in the dependency array to ensure the effect runs when any of its dependencies change, preventing infinite loops and managing dependencies correctly.
Conclusion
React hook is a simple function that helps us to do complex work easily. We've covered all hooks like useState, useEffect, useContext, useReducer, useCallback, useMemo, useRef, useImperativeHandle, useLayoutEffect, and useDebugValue with examples. We also learned which hook should be used when this is very important. Remember, practice makes us experts in any task. Start practicing these hooks now to become a pro.
When using React hooks, keep these tips in mind:
- Follow hook rules: Call hooks only at the top level and within React functional components. Do not use them inside loops, conditions, or nested functions.
- Understand dependencies: Include all needed variables in the dependency array for hooks like useEffect, useCallback, and useMemo.
- Manage state and side effects: Use useState for local state and useEffect for side effects, remembering to clean up to prevent memory leaks.
If you've understood this article completely, you will not have any questions about React Hooks. But if you do, or if you have queries about web development, you can ask them in the question box given below. You will get the answer as soon as possible.