Getting Started with React Class Components - A Tutorial

Published on : May 14,2023
Getting Started with React Class Components - A Tutorial

Here's an article on creating React class components:

React class components are a powerful tool for building complex web applications. They allow developers to create components with state and lifecycle methods that can be used to manage the behavior of the component. In this article, we'll explore how to create and use React class components.

 

Step 1: Create a new React project

To get started, let's create a new React project using create-react-app. Open your terminal and run the following command:

npx create-react-app opencodesolution-class-components

This will create a new React project in a directory called opencodesolution-class-components. Navigate into the new directory by running:

cd opencodesolution-class-components

 

Step 2: Create a new React class component

Next, let's create a new React class component called Counter. Open the src/App.js file and replace its contents with the following code:

import React, { Component } from 'react';

class Counter extends Component {
  constructor(props) {
    super(props);
    this.state = { count: 0 };
    this.handleClick = this.handleClick.bind(this);
  }

  handleClick() {
    this.setState((prevState) => ({
      count: prevState.count + 1,
    }));
  }

  render() {
    return (
      <div>
        <p>Count: {this.state.count}</p>
        <button onClick={this.handleClick}>Click me</button>
      </div>
    );
  }
}

export default Counter;

In this code, we've created a new React class component called Counter that has a count state and a handleClick method that updates the state when a button is clicked.

 

Step 3: Use the Counter component

Finally, let's use the Counter component inside the App component. Open the src/index.js file and replace its contents with the following code:

import React from 'react';
import ReactDOM from 'react-dom';
import Counter from './App';

function App() {
  return (
    <div>
      <Counter />
    </div>
  );
}

ReactDOM.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>,
  document.getElementById('root')
);

This code creates a new App component that renders the Counter component.

 

Step 4: Run the React application

To run the React application, open your terminal and run the following command:

npm start

This will start a development server and open the application in your default browser. You should see a Count heading and a Click me button. Clicking the button will increment the count displayed on the page.

Congratulations, you have successfully created and used a React class component! With this technique, you can create complex components with state and lifecycle methods that can be used to manage the behavior of your web application.

Categories : React

Tags : react class components tutorial state lifecycle methods opencodesolution

Praful Sangani
Praful Sangani
I'm a passionate full-stack developer with expertise in PHP, Laravel, Angular, React Js, Vue, Node, Javascript, JQuery, Codeigniter, and Bootstrap. I enjoy sharing my knowledge by writing tutorials and providing tips to others in the industry. I prioritize consistency and hard work, and I always aim to improve my skills to keep up with the latest advancements. As the owner of Open Code Solution, I'm committed to providing high-quality services to help clients achieve their business goals.
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