How does reactJs differ from other JavaScript libraries/frameworks?

Unlike some JavaScript libraries or frameworks that aim for a comprehensive solution (like React or Angular), reactJs focuses on providing accessible components for building UIs. It emphasizes accessibility, simplicity, and performance, making it a great choice for projects where those aspects are critical.

Is reactJs suitable for all types of web applications?

While reactJs can be used in various web applications, its strengths lie particularly in projects where accessibility is a priority. It's a great choice for building web apps that need to comply with accessibility standards or for projects targeting a diverse audience with varying needs.

Does reactJs have good community support and documentation?

Yes, reactJs has a growing community of developers and enthusiasts. The project is actively maintained, and resources are available online, including documentation, tutorials, and community forums, to help developers get started and troubleshoot any issues they encounter.

Is reactJs suitable for beginners in web development?

Yes, reactJs can be a good choice for beginners in web development, especially those who want to focus on building accessible user interfaces. Its API is straightforward and intuitive, making it relatively easy for newcomers to grasp. Additionally, the emphasis on accessibility can help beginners learn best practices.

What is React JS Development? Everything You Know

So, you want to know everything about ReactJs? You are on the right track. Grab your snacks, drinks, and, most importantly, your intelligent mind to focus on each topic we explain. In this blog, we discuss how to use ReactJS for website development, how to use ReactJS for mobile application development, and how ReactJS developers use this technology to develop highly interactive user interfaces. React js is Still very popular but slightly behind Node.js at 40.6%. Its component-based structure and large community make it a favourite for complex Single-Page Applications (SPAs).

So, let's start by discussing the first question that comes to your mind.

React — Framework or Library?

The React library is written in JavaScript. It’s used to build fast and responsive user interfaces for websites and mobile applications. It is an open-source, component-based front-end library that only manages the application's view layer.

React is called "the V in the MVC architecture", as it controls the application's look and feel. It is a client-side JavaScript library that runs in the user's browser. React also uses a virtual DOM, which improves performance by quickly updating only the necessary parts of the user interface.

In 2011, Facebook developed and maintained React. Suppose you are a developer with knowledge of website development core languages such as HTML, CSS and JavaScript. In that case, you can quickly create feature-rich user interfaces by understanding all the concepts covered in this blog.

Why is ReactJs Called a JavaScript Library?

React is called a JavaScript library primarily because it offers a set of reusable components and functions that developers can use to build user interfaces for websites and mobile applications using JavaScript. While it's true that React can be used to create, store, and use JavaScript applications, Its primary intention is to make it easier to build user interfaces.

Developers can use React to create UIs from individual, reusable components, which can be building blocks for web interfaces. React is an open-source JavaScript library that helps developers use JavaScript to build user interfaces and customise their applications with prewritten functions, add-ons, and scripts.

Why is ReactJs Popular in Web Development?

ReactJS is a simple JavaScript library for building user interfaces on websites and software. Because it is component-based, developers can design reusable user interface components. React's virtual DOM improves performance by quickly updating the real DOM, while its declarative approach makes UI development easier by defining how the UI should look. Write UI components in JavaScript files more easily with JSX syntax, and predictable application behaviour is guaranteed by React's one-way data flow. React offers a practical framework for creating dynamic and compelling online apps.

Reactjs is popular in developers' hearts for many reasons, including flexibility in development. First and foremost, its component-based architecture makes it simple to create reusable and modular UI elements. This component speeds up development and improves code maintainability for developers. React has a vibrant ecosystem that includes an extensive collection of libraries, tools, and community support, which helps to speed up development, so for this reason, developers always choose ReactJS first.

Why is ReactJs Popular in Web Development?

Twelve well-known companies that leverage ReactJS for their platforms. ReactJS, developed by Facebook, is one of the most popular JavaScript libraries for building user interfaces, especially single-page applications. The brands displayed are leaders in their respective industries, showcasing ReactJS’s versatility and robustness in handling complex, large-scale applications.

Facebook: The original creator of ReactJS uses it extensively for dynamic, fast-loading pages.
Instagram: Built by Facebook, it uses ReactJS for an intuitive and interactive user experience.
Dropbox: Implements ReactJS to enhance its file-sharing and storage service.
Tesla: Utilizes ReactJS in its front-end applications, including the Tesla website.
WhatsApp: This messaging platform relies on ReactJS for smoother messaging experiences.
Airbnb: Uses ReactJS for its complex search functionalities and user interfaces.
Twitter: ReactJS powers parts of its web platform, especially for faster user interactions.
Skype: Utilizes ReactJS for seamless communication and real-time updates.
Netflix: Uses ReactJS to enhance its video streaming platform and offer better performance.
Discord: Employs ReactJS for its highly interactive and real-time messaging interface.
PayPal: Leverages ReactJS to ensure secure and fluid payment experiences.
Uber Eats: Relies on ReactJS for a responsive and dynamic food delivery platform.

These brands illustrate ReactJS’s power in creating scalable, high-performance applications, improving user experience across various platforms.

Main Features of React JS That Developers Should Know

React JS is a popular JavaScript library used for building user interfaces. It allows developers to create reusable UI components and efficiently update the UI when data changes. Additionally, React uses a virtual DOM to improve performance by only updating the necessary parts of the actual DOM. Let's explore every detail of the features of ReactJS.

1. Virtual DOM

The DOM (Document Object Model) can be thought of as a web page roadmap, which browsers use to both understand and update its content. The Virtual DOM in React is, in fact, a lightweight replica of the actual DOM. When app modifications occur, the Virtual DOM is first updated by React and then compares the changes in an efficient manner by using the Differences algorithm. The changed parts are then only updated in the real DOM. Thus, the selective updating that React does makes the React framework very fast.

2. JSX (JavaScript XML)

JSX is a JavaScript language feature that provides developers with the ability to write HTML code directly in JavaScript, which comes from a technology called HTML/XML. It is a way of simplifying the presentation by including the HTML used to form data and JavaScript logic to manage it. The flow of code becomes more seamless. Besides, it's worth noting that although JSX is not mandatory, the majority of the front-end community considers it an essential tool for code cleanliness and better efficiency in React.

3. Component-Based Structure

React lives by the philosophy of modularity. Developers create components as pieces of website structures. They can, in turn, make use of that code and integrate these small building blocks into larger parts of the user interface. Application migration is easier when doing so as it enables one to deal with the components that are no longer needed as well as the components that are going to be added without impacting the rest of the application.

4. One-Way Data Binding

React uses a unidirectional data flow in which data is moved only in a single direction, that is, from parent components to child components. With it, tracking the changes in data becomes straightforward, and developers can thus have better control over data exchange, bug traceability, and, of course, a more efficient updating process.

How to use Hooks in React JS?

Hooks are used in React to give functional components access to the state and to manage side effects. Using hooks in ReactJS is simple. Without having to create a class, you can use state and other React features by using hooks. Let's take a basic overview of how to use hooks:

Import Hooks: Import the hooks you want to use from the react package. Commonly used hooks include useState, useEffect, useContext, useReducer, etc.

import React, { useState, useEffect } from 'react';

Using useState Hook: The useState hook allows you to add state to functional components. It returns an array with two elements: the current state value and a function to update it.

const [count, setCount] = useState(0);

Using useEffect Hook: The useEffect hook allows you to perform side effects in functional components. It takes a function as its argument, which will run after every render. You can also provide a second argument, an array of dependencies, to control when the effect runs.

useEffect(() => {
  document.title = `You clicked ${count} times`;
}, [count]); // Only re-run the effect if count changes

Create Custom Hooks: You can also create custom hooks to reuse stateful logic across components. Custom hooks are regular JavaScript functions prefixed with use.

function useCustomHook(initialValue) {
  const [value, setValue] = useState(initialValue);

  function handleChange(newValue) {
    setValue(newValue);
  }

  return [value, handleChange];
}

Using Context API with useContext Hook: The useContext hook allows you to consume values from a context without nesting.

const MyContext = React.createContext();

function MyComponent() {
  const value = useContext(MyContext);
  // use the value here
}

These are just a few examples of how you can use hooks in ReactJS to manage state, perform side effects, create custom logic, and consume context. Hooks provide a more concise and flexible way to work with React components than class-based ones.

How to use Context API in React JS?

As mentioned before, the context API helps solve the problem of passing data through lots of nested components, which can make your code messy and complicated to manage. It's useful when sharing data across different app parts, divide your code easier to understand and maintain.

Using the Context API in React allows you to pass data by the component tree without passing props manually at every level. It's beneficial for passing down global data such as themes, user authentication, or language preferences.

Here's a basic example of how to use the Context API in React:

1. Create the Context: Use React.createContext().

// MyContext.js
import React from 'react';

const MyContext = React.createContext();

export default MyContext;

Provide the Context: Wrap your application (or a part of it) with a Context Provider. This is where you'll pass the data you want to make available to child components.

// App.js
import React from 'react';
import MyContext from './MyContext';

function App() {
  const someData = 'Hello from Context!';

  return (
    
      {/* Your components here */}
    
  );
}

export default App;

Consume the Context: In any block that needs access to the context data, use the useContext hook or the Consumer component.

2. Using useContext hook:

// MyComponent.js
import React, { useContext } from 'react';
import MyContext from './MyContext';

function MyComponent() {
  const contextData = useContext(MyContext);

  return {contextData};
}

export default MyComponent;

3. Using Consumer component:

// MyComponent.js
import React from 'react';
import MyContext from './MyContext';

function MyComponent() {
  return (
    
      {contextData => {contextData}}
    
  );
}

export default MyComponent;

Accessing Nested Contexts: You can nest contexts within each other. In this case, a component will access the nearest enclosing provider up the component tree.

Updating Context Data: To update context data, you would typically lift the state to the provider component or use more advanced techniques like reducers with the useReducer hook.

That's the basic idea of using the Context API in React. It helps to avoid prop drilling and makes your code cleaner by providing a way to share data across your component tree.

How to Build forms in React JS?

We'll explore various scenarios that developers often face when working with forms, such as submitting forms, managing validation errors in fields, and dealing with loading indicators during form submission. Through examples, we'll walk through these everyday situations to provide a better understanding of how to build and manage forms in React effectively.

Building forms in React involves several steps, including defining form elements, handling user input, and managing form state. Here's a basic example of how to build a form in React:

Example of build form in React JS

import React, { useState } from 'react';

function MyForm() {
  const [formData, setFormData] = useState({
    firstName: '',
    lastName: '',
    email: '',
  });

  const handleChange = (e) => {
    const { name, value } = e.target;
    setFormData({ ...formData, [name]: value });
  };

  const handleSubmit = (e) => {
    e.preventDefault();
    // Handle form submission here
    console.log(formData);
  };

  return (
    <form onSubmit={handleSubmit}>
      <label>
        First Name:
        <input type="text" name="firstName" value={formData.firstName} onChange={handleChange} />
      </label>
      <label>
        Last Name:
        <input type="text" name="lastName" value={formData.lastName} onChange={handleChange} />
      </label>
      <label>
        Email:
        <input type="email" name="email" value={formData.email} onChange={handleChange} />
      </label>
      <button type="submit">Submit</button>
    </form>
  );
}

export default MyForm;

State Management: Use the useState hook to manage the state of your form data. Each form input should have its own state variable.
Handling Input Changes: Create a function to control changes to the form inputs. This function should update the state with the new input values.
Handling Form Submission: Create a function to handle form submission. This function should prevent the default form submission behaviour, perform any necessary validation, and submit the form data as needed.
Render the Form: Render the form elements inside the component's return statement. Use the value and onChange props to connect the form inputs to the state and input change handler.
Submit the Form: Add a submit button to the form. When clicked, this button should trigger the form submission handler.

This is a basic example of building a form in React. Depending on your application's requirements, you may need to add validation, error handling, or other features to your form.

How to Handle Events in React JS?

Handling events in React JS involves using event handlers hooks to respond to user interactions such as clicks, keypresses, form submissions, etc. Here's a basic overview of how to handle events in React:

Event Handling Syntax: In React, you use camelCase to specify event names rather than lowercase. For example, use onClick instead of on click.

Inline Event Handlers: You can add event handlers to JSX elements using inline event handler syntax.

import React from 'react';

function MyComponent() {
  const handleClick = () => {
    console.log('Button clicked');
  };

  return (
    
  );
}

export default MyComponent;

Using Arrow Functions: You can define event handler functions directly inside the JSX using arrow functions.

import React from 'react';

function MyComponent() {
  return (
    
  );
}

export default MyComponent;

Passing Parameters to Event Handlers: If you need to pass parameters to an event handler function, you can use an arrow function within the inline event handler.

import React from 'react';

function MyComponent() {
  const handleClick = (param) => {
    console.log('Button clicked with param:', param);
  };

  return (
    
  );
}

export default MyComponent;

Binding Event Handlers: You can also bind event handlers in the constructor or using arrow functions in class components to ensure they have access to the correct context.

import React, { Component } from 'react';

class MyComponent extends Component {
  constructor(props) {
    super(props);
    this.handleClick = this.handleClick.bind(this);
  }

  handleClick() {
    console.log('Button clicked');
  }

  render() {
    return (
      
    );
  }
}

export default MyComponent;

Preventing Default Behavior: You can prevent the default behaviour of an event using preventDefault().



import React from 'react';

function MyForm() {
  const handleSubmit = (e) => {
    e.preventDefault();
    console.log('Form submitted');
  };

  return (
    
      
    
  );
}

export default MyForm;

These are the basic techniques for handling events in React. Depending on the complexity of your application, you may need to use more advanced event-handling patterns like event delegation, state lifting, or third-party event management libraries.

What are the Latest Trends in ReactJS Development?

Every front-end developer waits for every update in React JS. React.Js has become very popular in front-end development in recent years due to its flexibility, performance, and ease of use. One of the latest trends in React JS development is the increasing focus on server-side rendering to improve SEO and performance.

Let’s know more about new upcoming and released features of reactjs.

React Hooks:
Hooks are a feature introduced in React 16.8 that allows you to use state and other React features without writing a class. It promotes functional programming techniques and streamlines the code.
Server-Side Rendering (SSR):
SSR has become increasingly popular with React applications to improve performance and SEO. Frameworks like Next.js and Gatsby.js make SSR easier to implement.
Static Site Generation (SSG):
Like SSR, SSG generates HTML pages at build time rather than on each request. It's efficient and offers fast loading times, which is crucial for modern web applications.
TypeScript with React:
TypeScript is a statically typed superset of JavaScript that adds optional static typing to the language. It enhances code quality and developer productivity and helps catch errors early in development.
State Management Libraries:
While Redux has been the dominant state management library for React applications, alternatives like Recoil and Zustand have gained popularity due to their simplicity and flexibility.
GraphQL Integration:
GraphQL simplifies data fetching by enabling clients to request only the needed data. Tools like Apollo Client make it easy to integrate GraphQL with React applications.
Component Libraries and Design Systems:
With the increasing complexity of React applications, component libraries and design systems like Material-UI, Ant Design, and Chakra UI help developers build consistent and visually appealing UIs.
Performance Optimization:
React developers focus on performance optimization techniques like code splitting, lazy loading, and memoization to ensure fast rendering and smooth user experiences.
Micro Frontends:
Breaking down large monolithic frontend applications into smaller, more manageable pieces called micro frontends allows teams to work independently on different parts of the application and deploy changes more quickly.
Progressive Web Applications (PWAs):
PWAs combine the best features of web and mobile apps to deliver a native app-like experience to users. React can be used to build PWAs that work offline, load instantly, and provide push notifications.

These trends always evolve with customer demand and market requirements. But always learning new technologies and working with best practices helps your designs work in the market and beat your competitors.

How to Create a Single Page Application (SPA) using ReactJS?

Creating single-page applications using ReactJS is a simple process. Follow these simple steps to create your SPA:

Set Up Your Development Environment: Ensure you have Node.js and npm (Node Package Manager) installed on your system. You can create a blank React project using create-react-app, a tool that creates a new React project with a default folder structure and build pipeline.

npx create-react-app my-spa

Design Your Application Structure: Plan out the components and layout of your SPA. Decide on the navigation structure and determine which components represent different pages or views within your application.

Create Components: Break down your application into reusable components. Each component should encapsulate a specific piece of functionality or UI element. Define your components' behaviour and structure using JSX syntax.

Implement Routing: Install the React Router library to handle client-side routing in your SPA. Define the routes for different pages or views in your application and map them to corresponding components.

npm install react-router-dom

// App.js
import { BrowserRouter as Router, Route, Switch } from 'react-router-dom';
import Home from './components/Home';
import About from './components/About';
import Contact from './components/Contact';

function App() {
  return (
    <Router>
      <Switch>
        <Route exact path="/" component={Home} />
        <Route path="/about" component={About} />
        <Route path="/contact" component={Contact} />
      </Switch>
    </Router>
  );
}

export default App;

Fetch Data: If your SPA needs to interact with a server to fetch data, you can use libraries like Axios or the built-in fetch API to make HTTP requests from your components.

Handle State: Manage application state using React's built-in state management or external libraries like Redux. Keep track of data that changes over time and pass it down to child components as props.

Styling: Use CSS, preprocessors like Sass, or CSS-in-JS libraries to style your components and create a visually appealing user interface.

Testing: Write individual tests for your components and integration tests for your application logic using testing frameworks like Jest and React Testing Library.

Build and Deploy: Once your SPA is ready, use the npm scripts provided by create-react-app to build a production-ready bundle of your application. The bundle can then be installed on a web server or hosted on a cloud platform such as AWS Amplify, Vercel, or Netlify.

npm run build

Optimization: Optimize your SPA for performance by reducing bundle size, lazy loading components, and implementing code splitting. Monitor your application's performance using tools like Lighthouse and improve as needed.

This is a high-level overview of creating a single-page application using ReactJS. As you dive deeper into development, you'll encounter additional challenges and considerations specific to your project requirements.

How ReactJs is Different from Angular and Vue.js

Factor	React.js	Angular	Vue.js
Learning Curve	Moderate. Uses JSX, requires understanding of components and states	Steep. Full-fledged MVC framework with TypeScript	Easy to moderate. Simple structure, but advanced features can be complex
Performance	Fast, efficient with virtual DOM	Slower compared to React due to larger size and more features	Fast with optimizations, slightly slower than React due to smaller community
Scalability	Highly scalable for large applications	Best for large enterprise applications	Suitable for small to medium-sized projects, scalable with additional tools
Ecosystem	Extensive with a large community and numerous third-party libraries	Rich ecosystem, but more opinionated	Growing ecosystem with lots of plugins and third-party tools
Flexibility	Highly flexible, only provides the view layer, needs third-party libraries for routing and state management	Less flexible, includes everything out-of-the-box, including routing and state management	Flexible like React, but comes with more built-in features
Tooling	Great tooling with Create React App, React Developer Tools, and libraries like Redux	Extensive CLI and built-in tools, supports TypeScript natively	Decent tooling with Vue CLI, supports TypeScript
Community Support	Large, active community with excellent support	Large, strong enterprise community	Growing community, especially popular in smaller apps
State Management	Uses third-party tools like Redux, MobX	Built-in state management system (NgRx)	Vuex for state management, simpler than Redux
Data Binding	One-way data binding (unidirectional)	Two-way data binding	Two-way data binding
Documentation	Well-documented with tutorials and guides	Comprehensive, but can be overwhelming	Well-documented, community-driven

How Does the Elightwalk ReactJs Development Team Help You?

Elightwalk Technology has ten years of experience in the development field. We faced so many challenges and obstacles along the way and found innovative solutions to overcome them. Our reactJs developer team is committed to pushing the limits of technology and providing cutting-edge solutions in projects.

Consultation and Planning: Our team can work with you to understand your requirements, goals, and constraints. We can provide expert advice on technology choices, architecture design, and project planning to deliver a successful outcome.

Development and Implementation: Our team can handle your project's actual development and implementation. Whether building a new application from scratch, adding new features to an existing one, or fixing bugs, our team has the skills and experience to get the job done efficiently.

Quality Assurance and Testing: Testing software's working quality and working properly is more important. To find and resolve any issues before deployment, the Elightwalk team can conduct extensive testing, including unit testing, integration testing, and end-to-end testing.

Deployment and Maintenance: Our team can help you deploy your project to production environments and create a smooth transition once your project is ready. We can also provide ongoing maintenance and support to keep your application running smoothly and up-to-date.

Training and Knowledge Transfer: Our team can provide training and knowledge transfer sessions to your internal teams, enabling them to independently maintain and extend the application.

Continuous Improvement: The Elightwalk team believes in continuous improvement and can help you iterate on your project to incorporate feedback, address changing requirements, and stay ahead of the competition.

Our ReactJS Developer Team is committed to delivering high-quality, reliable software solutions that meet your needs and exceed your expectations.

Essence

This detailed blog takes a good in-depth look into React JS development, which focuses on such essential topics as the argument on whether React is a library or a framework, the proper use of Hooks, the connection of the Context API, and the best questionnaire about event and form handling. Also, you can learn new ways to make single-page apps. You can keep up with the latest ReactJS development optimization techniques. You have to go through knowing the rate at which that happens on the course of your creation.

Elightwalk Technology provides professional ReactJS Development Service. Our team of experts builds dynamic, scalable, and efficient web and mobile apps. Our experienced team can take your project from the start phase all the way through while obtaining the best results along the way.

Feel free to Contact Us at any time with questions or to discuss the specifics of your project.

What is ReactJs Development?