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Functional Components in React

Introduction to React
What is React? Advantages of React JSX syntax Setting up the development environment
Components and Props
Components in React Functional Components Class Components Props PropTypes and defaultProps Component composition
State and Lifecycle Methods
State in React setState method Lifecycle Methods in Class Components Conditional Rendering based on the state
Handling Events
Event handling in React Binding Event Handlers Passing Arguments to Event Handlers Conditional Event Handling
Forms and User Input
Forms in React Controlled Components Uncontrolled Components Form Validation
Lists and Keys
Rendering Lists in React Keys Extracting Components with Keys
Components Lifecycle
Understanding Components Lifecycle Mounting, Updating and Unmounting Lifecycle Methods
Working with APIs
Making HTTP Requests with Axios Handling Responses with Promises Asyncawait syntax for making API calls
React Router
What is React Router? Installation Configuring Routes Navigating between pages using Link and NavLink components
Redux State Management
What is Redux Three principles of Redux Redux Store, Actions, and Reducers ReactRedux integration
Styling React Applications
Styling in React Inline styles CSS Modules Styled Components
Testing React Applications
Testing Fundamentals Testing React Components Integration Testing Using Jest and React Testing Library
Deployment and Optimization
Deployment options for React applications Performance Optimization Code Splitting React Lazy and Suspense
Next Steps
Advanced Topics Resources for continued learning Conclusion

Functional Components

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#description

Functional Components in React are a type of component that is created using a JavaScript function. They are the simplest and easy-to-understand way to create a React component, without the need for the class syntax.

Functional components are preferred over class components when we need to write less code, reuse code and handle simple states in a component. Unlike class-based components, functional components do not have their own internal state or lifecycle methods.

Here's an example of a functional component that displays a basic message:

 
                    
import React from 'react';

function Welcome(props) {
  return <h1>Hello {props.name}!</h1>;
}

export default Welcome;

As you can see, the function takes props as a parameter and returns the desired output, in this case, an h1 tag with a "Hello" message and the name of the user (passed through props).

In functional components, we use React hooks such as useState, useEffect and useContext to introduce some state functionality and manipulate state data.

Functional components are more elegant, concise and easy to read, making them a favorite among developers in the React community.

March 25, 2023

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