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Node Js React Js | Step 2: Create An Api Endpoint

How To Connect React JS With Node JS | Node JS Tutorial For Beginners | What Is Node JS |Simplilearn

Step 2: Create an API Endpoint

We want to use our Node and Express server as an API, so that it can give our React app data, change that data, or do some other operation only a server can do.

In our case, we will simply send our React app a message that says “Hello from server!” in a JSON object.

The code below creates an endpoint for the route

/api

.

If our React app makes a GET request to that route, we respond (using

res

, which stands for response) with our JSON data:


// server/index.js ... app.get("/api", (req, res) => { res.json({ message: "Hello from server!" }); }); app.listen(PORT, () => { console.log(`Server listening on ${PORT}`); });

Note: Make sure to place this above the

app.listen

function.

Since we’ve made changes to our Node code, we need to restart our server.

To do that, end your start script in the terminal by pressing Command/Ctrl + C. Then restart it by running

npm start

again.

And to test this, we can simply visit

http://localhost:3001/api

in our browser and see our message:

ReactJS and NodeJS are both JavaScript technologies. But the uses of NodeJS and ReactJS are entirely different. NodeJS is a framework of JavaScript which is mainly used for working with the backend of our application or building the backend using JavaScript, whereas ReactJS is a JavaScript front-end library. It is mainly used for building the user interface or the frontend of our application. Though both are used for different purposes, both these technologies make our application faster and easy to handle.

The developers should know about the technology well before using it in their projects. So, let us learn about these technologies first to decide when we can and should use these and when we shouldn’t.

What is Node.js?

Node.js is a technology to build the back-end of applications with JavaScript.

Google Chrome’s V8 JavaScript engine powers Node.js. Node.js effective and lightweight because it uses an event-driven and non-blocking I/O model. Developers use this framework for hosting APIs, serving HTTP requests, and accessing the database.

Who uses Node.js?

Currently, Node.js is used by many companies and has several famous clients, like Netflix, Trello, and Uber. Below we share why Node.js has become their framework of choice.

Netflix, the leader of online video streaming, conducts A/B testing to provide 93 million users with a rich experience. The platform faces problems of conditional dependencies and app scalability. To solve these issues, the company has chosen Node.js for its fast speed and that it’s lightweight. In this way, Netflix has managed to decrease startup time by 70%.

Trello, a project management app, uses Node.js for its server-side. The Trello team found Node handy for system updates, which need a lot of open connections.

Uber, a two-sided carpooling service, said that Node.js is one of the most crucial tech solutions. The framework enables scaling up in line with the rising demand for their services.

Node JS Key Features

Now, let us find out about the main Node.js features.

  • Open-source. Node.js is a free and open-source framework.
  • Enhanced performance. Developers can perform non-blocking operations, which enhances web app performance.
  • Server development. Node has in-built APIs. Consequently, Node.js allows developers to make different servers like DNS servers, TCP server, HTTP server, and more.
  • Unit testing. Node.js has unit testing called Jasmine, which allows testing ready code quickly.
  • Scalability. Apps built with Node.js can be scaled in both a Vertical and Horizontal way to improvise their performance.
How To Connect React JS With Node JS | Node JS Tutorial For Beginners | What Is Node JS |Simplilearn
How To Connect React JS With Node JS | Node JS Tutorial For Beginners | What Is Node JS |Simplilearn

What Is Node.js?

First of all, Node.js is neither a programming language nor a framework.

Node.js is an open-source JavaScript runtime environment built on Chrome’s V8 JavaScript engine. What is a JavaScript runtime environment, you might ask?

Well, in the simplest terms, a JavaScript runtime environment allows you to run your JavaScript code outside the browser. JavaScript is a programming language primarily built to run on browsers like Chrome, Firefox, Safari, and so on. But with Node.js, developers can run JavaScript code almost anywhere else apart from the browser. It allows developers to run JavaScript code from the command line to a Raspberry Pi to IDEs, the internet of things, and even server scripts.

In addition, Node.js allows developers to run JavaScript on the server side, creating server-side applications with JavaScript. It’s specifically designed to help developers build scalable network applications, and it is especially good at handling a large number of concurrent connections.

Furthermore, Node.js is commonly used for building real-time web applications, such as chat apps, online multiplayer games, and other apps that require real-time communication between the server and the client.

Features of Node.js

Node.js is one of the most popular technologies used for server-side application development. Here are the main features of Node that set it apart from other tools and make it widely used by companies and developers alike.

Event-Driven Architecture

Node.js largely employs an event-driven architecture in its design. This allows it to maximize the throughput and scalability of asynchronous input/output processing in web applications with many input/output operations. And also to provide an efficient and optimized delivery between client-server communication. These capabilities of Node.js make it a popular choice over other server-side technologies for developing real-time web applications that are fast and scalable.

Free and Open Source

Node.js is an open-source software created by Ryan Dahl in 2009. Dahl initially created Node.js because he was fed up with how limited web servers were back then in handling concurrent connections and asynchronous operations. He created Node.js as free and open-source software to address these problems.

Since then, it’s been constantly developed and optimized by the developer community to keep it up-to-date with the latest industry standards, improve its flexibility, and make it future-proof.

As of today, the latest version of Node.js is 19.x, and there are no signs the project will be abandoned anytime soon.

Cross-Platform Support

One of the core strengths of Node.js is multiple platform support, and this is largely due to the fact that it’s open-source and the huge community of developers that have evolved around it.

This capability lets you run your Node.js code on any OS from Windows to macOS or Linux. For instance, in a Node.js User Survey conducted in 2018, it was found that Node.js is being used on the most popular operating systems, including Windows, macOS, and Linux.

Single Threaded Event Loop

Like any other technology, understanding how things work under the hood in Node.js will be highly beneficial and useful in creating efficient and scalable applications with it.

Node.js uses a single-threaded event model to handle concurrent connections, unlike other server-side technologies like ASP.NET or Spring Framework, which use a multi-threaded request-response model.

What single-threaded means in Node.js is basically that Node.js is only able to run one task at a time. But then, how’s Node.js able to handle concurrent connections if it’s single-threaded? Well, in short, Node.js uses an Event Queue and a call stack to process these connections asynchronously, thereby creating a non-blocking behavior that optimizes your applications for speed and scalability.

Javascript


import React, { Component } from


'react'


class App extends Component {


render() {


return


"App"


<>

Hello from GeeksforGeeks!!


);


export


default


App;

Output:

Difference between Node.js and React.js:

Node.js React.js
Node.js used as a back-end framework React is used for developing user interfaces.
It supports the Model–view–controller (MVC) framework. Does not support the Model–view–controller (MVC) framework.
It runs on chrome’s v8 engine and uses an event-driven, non-blocking I/O model, which is written in C++. It uses Node.js to compile and optimize the JavaScript code and easy to create UI Test cases.
Node.js handles requests and authentication from the browser, make database calls, etc. It makes API calls and processes in-browser data.
Here the Real-time data streaming is handled easily. In React complex architecture makes it hard to keep track of the traditional approach.
Framework for JavaScript execution having the largest ecosystem of open source libraries. Facebook-backed Open Source JS library.
The language used is only JavaScript. The language used is JSX and JavaScript.
There is no DOM (Document Object Model) concept that is Used. Here the Virtual DOM (Document Object Model) is Used that makes it faster.
It is easy to write microservices in Node.Js Microservices are difficult to be written in React.Js
It is highly scalable. Scalability is still a challenge.
It has a simple architecture. It has a complex architecture.

Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, GeeksforGeeks Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!

Last Updated :
06 Apr, 2023

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Quick Overview:NodeJS vs ReactJS: both JavaScript programming frameworks. Although the two languages share remarkable correspondences, they are not the same.

How to Create a Express/Node + React Project | Node Backend + React Frontend
How to Create a Express/Node + React Project | Node Backend + React Frontend

What is ReactJS?

React JS is an open-source, cross-platform JavaScript-based framework that assists developers in creating user interfaces for responsive web and single-page applications. It is a free and open-source JavaScript library used to create mono-user interfaces. React JS is expressive, swift, and versatile, allowing us to design reusable UI components. It is a foundation in standard, large, interactive web applications.

Its virtual DOM technique is a time-consuming and inaccurate way of developing code. Each component involved is accountable for rendering a small, reusable piece of HTML. Developers can layer components within other components to create sophisticated applications from the basics in React JS, a quick and versatile framework supported by Facebook/Instagram and other developer communities.

Javascript


const http = require(


'http'


);


http.createServer(


function


(req, res) {


res.write(


'GeeksforGeeks'


);


res.end();


}).listen(8080);

Output: For compiling the nodejs file go to the terminal and follow the command:

node foldername.js

Now, open the localhost:8080 in your browser to see the output

ReactJS: It is an open-source JavaScript library for building single-page user interfaces. It is declarative, efficient, and flexible, and allows us to create reusable UI components, it is used as a base in single-page, complex, interactive web projects, and react components are difficult to reuse. The virtual DOM algorithm of React is a time-consuming and imprecise writing code. A React application is made of multiple components, each responsible for rendering a small, reusable piece of HTML. Components can be nested within other components to allow complex applications to be built out of simple building blocks.

Features of React.js: Here are some features that make React.js different from other programming languages:

  • React components have reusable codes that make it simple to use and learn.
  • React library has JSX (JavaScript XML), which is HTML-like syntax, which is processed into JavaScript calls.
  • React components are reusable which helps while working on larger scale projects and have its own logic and controls.
  • One-way data binding provides better control throughout the application.
  • The virtual DOM uses the ReactDOM library which ideally/virtually, represents UI and keeps in the memory and syncs with the real DOM.
  • DOM has a smoother and faster performance due to virtual components.

Create a react app project and edit the App.js file in the src folder as:

FilePath:- src/App.js:

React Node.js MySQL Full Stack Blog App Tutorial
React Node.js MySQL Full Stack Blog App Tutorial

When to Use Node.js Over React?

In the previous sections, we discussed the amazing capabilities and features of Node.js that make it an excellent choice for developing various types of applications. For instance, in a Stack Overflow Developer survey conducted in 2020, out of 40,314 respondents, about 51.4% of developers use Node.js in their application stack.

Let’s look at some of the kinds of applications and use cases Node.js can best be used for.

  • APIs: One of the primary use cases of Node.js is in API development. It allows developers to create scalable and high-performance APIs using frameworks such as Express.js.

  • Network Programming: Node.js provides a number of built-in modules for working with network protocols, such as the


    http

    and

    net

    modules for creating HTTP and network servers.

  • Internet of Things: Node.js, as a runtime environment, enables JavaScript to run anywhere. It can be run on a Raspberry Pi, for example, to create useful IoT applications, such as a smart energy monitor or a face recognition system.

  • Full-Stack Web Applications: Because of its non-blocking I/O model and ability to handle a large number of concurrent connections efficiently, Node.js is particularly well-suited for developing real-time, data-intensive full-stack web applications. Examples of popular applications using Node.js include Netflix, LinkedIn, Uber, and many others.

Step 4: Make HTTP Requests from React to Node

Now that we have a working React app, we want to use it to interact with our API.

Let’s see how to fetch data from the

/api

endpoint that we created earlier.

To do so, we can head to the

App.js

component in our

src

folder and make an HTTP request using useEffect.

We will make a simple GET request using the Fetch API to our backend and then have our data returned as JSON.

Once we have the data returned to us, we will get the message property (to grab our greeting that we sent from the server) and then put it in a state variable called

data

.

This will allow us to display that message in our page if we have it. We are using a conditional in our JSX to say that if our data is not there yet, show the text “Loading…”.


// client/src/App.js import React from "react"; import logo from "./logo.svg"; import "./App.css"; function App() { const [data, setData] = React.useState(null); React.useEffect(() => { fetch("/api") .then((res) => res.json()) .then((data) => setData(data.message)); }, []); return (

{!data ? "Loading..." : data}

); } export default App;

How To Create Full Stack E-Commerce Website Using React JS, MongoDB, Express & Node JS 2024
How To Create Full Stack E-Commerce Website Using React JS, MongoDB, Express & Node JS 2024

What is React.js?

React.js is an open-source front-end library to develop user interfaces for websites and web apps in a structured way. The idea behind React.js is to allow the development of a dynamic library with high performance. For instance, this technology is used to show newsfeed while people are chatting. React js alternatives are Angular and Vue.js.

You might also like VUE VS. ANGULAR VS. REACT COMPARISON

Who uses React.js?

Developed by a Facebook team, React is used for everything from content-based websites like The New York Times to apps like Twitter. Now, let us check apps that use this library.

Facebook, which relies heavily on user interaction with website elements. Thus, almost all dynamic elements of a Facebook web app are built with React.js.

Instagram is another example of successful React usage. The app is using React for Google Maps APIs, geolocation, and other features.

Netflix is using React.js for their Gibbon platform. This platform applies low-performance TV devices instead of the DOM used in web browsers. The React.js library helps the Netflix team to improve runtime performance, speed, and modularity.

HOW TO DEVELOP AN APP LIKE NETFLIX

In our experience, React.js came in handy to add a dynamic online multi-currency calculator to a two-sided marketplace. Read the full case study on the link.

React.js Main Features

Let us find out what React.js is about:

  • Easy maintenance. This library re-uses system components and solves any issues connected with React updates.
  • Performance. React is using Virtual DOM (document object model), which improves app performance.
  • Stable code. By using only downward data flow, React guarantees code stability and better app performance.
  • Developer toolset. React js provides developers with debugging and design tools, ensuring high performance.
  • Mobile app development. By following the same design patterns, you can build rich UI for native apps supported by iOS and Android platforms.

Now, let us compare React and Node.js.

Node.jsReact: Head-to-Head Comparison

From the previous sections, you already have an idea and basic understanding of what these two technologies are. Now, we’ll look at how they compare, their use cases, advantages and disadvantages, and when to consider using one over the other. This comparison is to help you make an informed decision when deciding on which to go for when building your next projects.

Similarities Between Node.js and React

Although Node.js and React are different technologies used to develop different parts of a web app, they do share some similarities.

One obvious similarity between React and Node.js is that they are both built on the JavaScript programming language. React lets you use JavaScript on the client side, while Node.js lets you write JavaScript on the server side.

Like the Virtual DOM in React, Node.js possesses a built-in Virtual Machine that provides a sandboxed environment for running and optimizing your JavaScript code. The Virtual DOM allows React to update the DOM efficiently by minimizing the number of DOM manipulations required. In comparison, the Virtual Machine in Node.js works like a renderer and provides contexts for compiling and running JavaScript code efficiently.

Another similarity between Node.js and React is that the two technologies are free and open-source. This means that their source code is available for anyone to view, use, and modify freely.

In addition, both React and Node are easy to learn and use, with a lot of documentation available online. This makes them great candidates for beginners looking to get into web development.

Furthermore, both React and Node.js have large and active developer communities that contribute to their constant development and maintenance. This can help developers find help and resources more easily, as well as ensure that these technologies are constantly improving and evolving to meet the latest standards.

Differences Between Node.js and React

The primary distinction between Node.js and React is in how and where each technology is used.

Node.js, in short, is a JavaScript runtime environment used for building applications that run on the server side. React, on the other hand, is a JavaScript UI library used to build client-side applications, usually for web browsers but also for mobile platforms.

The table below compares Node.js and React based on various metrics:

Node.js

React

Use Cases

APIs, network programming, IoT, real-time and data-intensive applications, etc.

Single-page applications, dynamic webpages, highly interactive UIs

Ease of Learning

Requires knowledge of core computer concepts

Documentation is easy to follow and requires no knowledge of core computer concepts,

Created with

C, C++, and JavaScript

JavaScript

Access to Web APIs

Provides no access to Web APIs

Provides access to Web APIs

Documentation

Lacks interactive demos

Includes interactive demos

Data Flow

Uses a two-way data flow in which the Node.js server and a client (such as the browser) can initiate a connection for a bi-directional data flow

Uses a unidirectional data flow pattern between parent components to child components via props

Advantages of Node.js Over React

Before we start discussing the advantages of Node.js, it’s important to note that Node.js and React are used for different purposes and should not be compared directly. However, if you’re going to be working with both technologies, here are some important details you need to keep in mind before using them.

One good advantage of Node.js over React is that Node.js allows developers to write both the front-end and back-end of an application from a single codebase, making it easier to build full-stack applications. For instance, you can use the EJS templating framework in Node.js to create fully-fledged full-stack applications without using a frontend framework like React.

In addition, Node.js is highly scalable, efficient, and flexible. It can be used with any frontend framework of your choice, unlike React, which is only concerned with the view or UI of your application and is hardly used alone to build web applications.

Furthermore, unlike React, Node.js supports many other applications besides web applications like IRC clients, file transfer tools, command line tools, and server-side scripting.

If you want to compare Node.js to something else, you can look into ASP.NET, Laravel, or Ruby, which are server-side development alternatives to Node.js.

Advantages of React Over Node.js

Unlike Node.js, React is best used for creating highly interactive and complex user interfaces in web or mobile applications. Although React integrates well with Node.js and both can be used together to create web or mobile apps.

As noted before, React and Node.js should not be compared directly. However, there are some significant advantages you’ll experience when writing applications in React compared to working with Node.js.

To begin with, React has a more mature community and ecosystem than Node.js. Beginners can use React’s boilerplates and examples to get started quickly with the library. You can, for example, use a tool like Create-react-app to bootstrap React applications in seconds without having to go through complex steps like configuring your app parts or worrying about the most appropriate file structure to use.

While frameworks like Express.js in Node.js make it easier to create Node applications, configuring and structuring your application is still entirely up to you. Node.js and Express provide almost no direction on how to structure your application. A huge disadvantage for developer experience.

Additionally, the React documentation often includes interactive demos that allow readers to see the results of the code they are learning about in real-time. This can be a helpful way for beginners to understand how React works under the hood and for more experienced developers to see how the different pieces fit together.

The Node.js documentation, on the other hand, although comprehensive and well-organized, lacks interactive demos and covers a wide range of topics related to core software development. Understanding database systems, network programming, and web application development are examples of such topics. As such, it may require a higher level of knowledge and familiarity with these concepts in order to understand the documentation fully.

🔐 Register and Login Module + Admin Dashboard | NodeJS ReactJS & MySQL | Admin authentication.
🔐 Register and Login Module + Admin Dashboard | NodeJS ReactJS & MySQL | Admin authentication.

Difference: Node JS vs React JS

React and Node.js are open-source JavaScript libraries that create user interfaces and server-side applications. Both are the most prominent front-end web development technologies, yet they are very different. The distinctions go beyond syntax and into each technology’s applications, abilities, and drawbacks. Understanding how they compete can help you determine the best fit for your strategic domains.

  • Node JS and React JS exhibit contrasting qualities that make both stand out in a user’s eye. When choosing to use Node JS in web development, it prioritizes individual module caching, making it highly adaptable. React JS promotes simple UI test cases supporting Android and iOS. It prioritizes the server and the front end, where code components can be reused. This encourages reduced debugging time resulting in a faster virtual DOM.
  • The minimal cons of Node JS include the lack of a well-stocked library. Also, asynchronous programming is utilized in lieu of linear blocking I/O programming. On the other hand, React JS is challenging for developers as it requires them to keep up with the continual introduction of new tools and technology.
  • Because of its asynchronous nature, Node JS can apparently also handle real-time data streaming. It can be utilized to broadcast media, data from many providers, file transfer, or as a WebSockets server. Node.js manages several connections at once. As a result, it’s ideal for an API service. Node.js is lightweight and speedy. As a result, it may be used to create microservices such as API gateways.
  • React JS is excellently suited for applications with several components, such as often changing statuses, user login, and access rights. Developers choose React.js to create websites with complicated structures that would be difficult to manage with a conventional method. As the application grows in size, it will enable you to keep track of all interactions.

Node js vs React js: Which is Better

Both Node.js vs React.js are modern technologies applied by many successful businesses.

But what should you choose for your proposed app? Let us give you a clue.

  • If you want to create a sophisticated yet scalable server-side web application, like an online streaming platform, your choice is Node.JS.
  • To create a project with changing states, like dynamic inputs, buttons, and so on, React.js is your perfect match.

At the same time, you can use both technologies for your web app. You can create the front-end of the web app with React and the back-end with Node js, as Netflix did.

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Related reading:

Calmerry Telemedicine Platform Case Study

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🔴 Realtime Chat App with React, Node.js, Socket.io and MongoDB

Node JS Development Services

NodeJS Development Services Includes:

  • Customization of Node.js, i.e., the inclusion of customized features and changes to meet the needs of your venture.
  • Design of microservices APIs, which resulted in increased server-side application performance.
  • Integration solution for Node.js that can connect Node.js with your existing corporate system by creating APIs to enhance functionality.
  • Mobile app services in Node.js that help design real-time, collaborative, cross-platform, responsive, and intelligent native mobile apps.
  • Plugin creation in Node.js to create the backend in JavaScript, wherein designated and professional engineers customize Node.js plugins.
  • Development of backend dashboards assistance in developing a web backend and an app with a web backend.
  • js consulting, development, and support that incorporates the provision of complete development life cycle management, deployment, and maintenance for the project.
  • API development in Node.js provides greater security, a lighter workflow, and a more pleasant user experience.
  • js for UX/UI design focuses on providing real-time web services to help create innovative and memorable UI/UX.
  • Development of Express.js applications that include the creation of lightweight, user-friendly, and interactive online and mobile apps using Express.js, a fast, opinionated, minimalist Node.js web framework.
  • We are giving ease, sustainability, and structural norms to Node JS applications with the assistance of other lightweight frameworks.

What Is React?

React (also known as React.js) is a JavaScript UI library for creating elegant and interactive user interfaces (or views) in single-page web applications – using blocks or reusable pieces of code called components.

React is a free and open-source JavaScript library developed by Facebook to help Facebook manage the bottlenecks that come with developing a complex application like Facebook Ads. These include maintaining the large and disconnected code bases of the Facebook Ads application.

It’s also safe to assume React was created to help the company keep up with the steady innovation on the web (Angular was already created by Google but Facebook didn’t want to use it for reasons best known to them). And also, React was developed to provide Facebook users on low-end devices with a consistent and high-performance user experience.

Features of React

Since it was released to the public in 2013, React has become a popular choice for building highly interactive front-end applications, all thanks to the following characteristics and capabilities it possesses.

Virtual DOM (VDOM)

React offers fast rendering for even complex applications, using its own virtual representation of the real Document Object Model (DOM) called the Virtual DOM.

The Virtual DOM in React is designed to provide faster UI updates than the expensive and slow traditional method of using the real DOM. The Virtual DOM abstracts away manual DOM manipulations from the developer that is otherwise cumbersome and helps in writing predictable code.

Here’s the definition of the Virtual DOM according to the React docs:

The Virtual DOM (VDOM) is a programming concept where an ideal, or “virtual,” representation of a UI is kept in memory and synced with the “real” DOM by a library such as ReactDOM. This process is called reconciliation.

In essence, React’s Virtual DOM diffing algorithm lets you save time and improve your application performance by avoiding expensive DOM updates.

Multipurpose

Aside from creating high-performance single-page web applications, React can also be used for developing server-side rendered applications using a framework like Next.js. You can as well use it for static site generation with Gatsby.

The popular mobile app framework, React Native, is also based on React and is used by many popular companies like Microsoft and Tesla to create complex and interactive mobile applications.

Unidirectional Data Flow

React is designed to use a unidirectional or one-way data flow model. Basically, in React, data is usually passed down through a tree of components from the parent component to its children.

You may wonder why React uses a unidirectional data flow pattern rather than a bidirectional model. Well, the unidirectional model comes with great advantages that improve the developer experience.

A key benefit of the unidirectional data flow is that it helps to make applications easier to write and debug by preventing unintended data mutation. By enforcing a strict hierarchy of data flow, it becomes easier to understand how different parts of an application are connected and how changes to the data will affect the component tree.

Component-Based Architecture

In React, you write code in components. Components are small, independent pieces of React code that are used to create simple and complex user interfaces. They are reusable and can be used anywhere throughout an application.

Components are usually created in two ways in React: function components and class components. Function components are more popular nowadays and even the new React docs encourage creating your components the functional way rather than using class components.

Overall, the component-based architecture of React makes it easier to develop, test, and maintain large applications, as well as to collaborate with other developers.

Free And Open-Source

React is free and open-source software developed and maintained by Meta and a huge developer community.

Because it is open-source, React can be freely used and modified by anyone. Its large developer community has contributed to the creation of a wide range of tools and resources that enhance its functionality.

In addition, React being open-source makes it future-proof and the project is not likely to be abandoned in the near future.

Declarative Programming Model

React’s core principles follow the declarative programming model, which gives developers the flexibility to construct user interfaces so they can be more easily understood by non-programmers.

Also, this model allows you to tell React what state you want the UI to be in, and it makes sure the DOM matches that state. This abstracts out the attribute manipulation, event handling, and manual DOM updating that you would otherwise have to use to build your app.

JSX

JavaScript XML (JSX) is a syntax extension for JavaScript that allows developers to write HTML-like code in their React codes. Although React doesn’t require JSX to use, JSX allows developers to write React applications faster, and it’s simple to read.

JSX comes with the full capabilities of JavaScript and is easier for beginners to work with.

Here’s an example component in React written in JSX:


import React from 'react; export default function Bio() { return ( < > < div className = "intro" > < h1 > Welcome to my website! < /h1> < /div> < p className = "summary" > You can find my thoughts here. < br > < /br> < b > And < i > pictures < /i> of scientists! < /p> < /> ); }

JSX is almost similar to HTML but it has a few rules and distinctions that set it apart. For example, in JSX, your markup must be wrapped in a single root element or a

Fragment

element lest React throws errors in your face.

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NodeJS Realtime Chat: Build a FULL-STACK app in 27 Minutes! (Best UI 🤩)

What is NodeJS?

Node JS is a JavaScript runtime environment that is open-source and cross-platform. The value of this technology rests in its ability to write server-side and client-side scripts. Node JS businesses utilize the same scripting language for both activities. It saves a developer’s time.

Node.js is a cross-platform open-source runtime environment for running JavaScript code outside a browser. It’s important to note that NodeJS is not a framework or a programming language. Most people are misguided and believe that the Bit is a blueprint or a scripting language. We frequently utilize Node.js to create backend services such as APIs, Web Apps, and Mobile Apps.

React JS Development Services

ReactJS Development Services Includes:

  • Enterprise Software Development is a form of software transformation in which developers work on complicated initiatives that include third-party services and patronage programs that may cause hindrances throughout the integration process.
  • Software designed for the entertainment and media industries that utilize React JS enables users to captivate their consumers with top-notch, adaptive, on-demand alternatives, all of which provide distinctive digital experiences.
  • Offering a comprehensive spectrum of premium web application development services, beginning with business analysis and UI/UX design and progressing to front-end and back-end programming, QA testing, maintenance, and support.
  • Banking software services that provide custom-tailored applications with desired bespoke features, UX/UI design, and security.
React Node.js E-Commerce App Full Tutorial (REDUX -  Stripe - JWT ) - MERN Stack Shopping App
React Node.js E-Commerce App Full Tutorial (REDUX – Stripe – JWT ) – MERN Stack Shopping App

Cài đặt

Node JS

Đầu tiên hãy tạo folder và cài đặt framework


$ mkdir -p todo/backend $ cd todo/backend $ nano package.json

Hãy tạo file package.json để cài đặt nhanh framework và các thư viện liên quan. Ở đây mình sẽ cài

chalk

để phần log thêm sinh động, framework

express js

, dùng

mongodb

+

mongoose

làm database và connect database,

morgan

cho việc show log ở terminal dễ dàng hơn. Và

forever

để chạy ngầm server, sử dụng cho việc deploy sau này.


{ "name": "backend", "version": "1.0.0", "description": "", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1" }, "author": "", "license": "ISC", "dependencies": { "chalk": "^4.1.0", "body-parser": "1.19.0", "express": "^4.17.1", "mongodb": "^3.6.1", "mongoose": "^5.10.3", "morgan": "1.10.0", "forever": "3.0.2", "cors": "2.8.5" } }

Và chạy npm install để cài đặt hết tất cả các dependencies này cho server Node Js


$ cd todo/backend $ npm install

Hãy chắc rằng bạn đã chạy mongo db

sudo systemctl status mongod

Cùng xem cấu trúc thư mục của backend như nào nhé


. ├── config │ ├── api.routes.js │ ├── database.js │ └── properties.js ├── controllers │ └── api │ └── top_pages_controller.js ├── package.json ├── package-lock.json └── server.js

Mọi cấu hình mình sẽ đặt ở folder

config/

, như database, routes, các setup cho port ứng dụng, link database …

Các controller xử lý logic sẽ nằm ở

controllers/

. Ở ngoài cùng sẽ là

server.js

dùng cho việc chạy server.


// config/properties.js module.exports = { PORT : 4000, DB : 'mongodb://localhost:27017/backend-todos', CORS : ['http://localhost:3000'] }

File

properties.js

này sẽ là nơi chúng ta lưu các thông số cố định như đường link hay các cổng kết nối với các ứng dụng khác .v.v.


// config/database.js var mongoose = require('mongoose'); mongoose.set('useCreateIndex', true); var chalk = require('chalk'); var dbURL = require('./properties').DB; var connected = chalk.bold.cyan; var error = chalk.bold.yellow; var disconnected = chalk.bold.red; var termination = chalk.bold.magenta; module.exports = function(){ mongoose.connect(dbURL); mongoose.connection.on('connected', function(){ console.log(connected("Mongoose default connection is open to ", dbURL)); }); mongoose.connection.on('error', function(err){ console.log(error("Mongoose default connection has occured "+ err +" error")); }); mongoose.connection.on('disconnected', function(){ console.log(disconnected("Mongoose default connection is disconnected")); }); process.on('SIGINT', function(){ mongoose.connection.close(function(){ console.log(termination("Mongoose default connection is disconnected due to application termination")); process.exit(0) }); }); }

File cấu hình

database.js

sẽ đảm nhiệm việc quản lý kết nối từ NodeJS đến mongodb, handle khi kết nối/ngắt kết nối và các lỗi nếu có.


// server.js var express = require('express'); var log = require('morgan')('dev'); var bodyParser = require('body-parser'); var cors = require('cors') var properties = require('./config/properties'); var db = require('./config/database'); var apiRoutes = require('./config/api.routes'); var app = express(); var bodyParserJSON = bodyParser.json(); var bodyParserURLEncoded = bodyParser.urlencoded({extended:true}); var router = express.Router(); var whitelist = properties.CORS; var corsOptions = { origin: function (origin, callback) { if (whitelist.indexOf(origin) !== -1) { callback(null, true) } else { callback(new Error('Not allowed by CORS')) } } } app.use(cors(corsOptions)); db(); app.use(log); app.use(bodyParserJSON); app.use(bodyParserURLEncoded); app.use('/api',router); apiRoutes(router); app.listen(properties.PORT, (req, res) => { console.log(`Server is running on ${properties.PORT} port.`); })

React js


$ cd todo $ npx create-react-app frontend $ mkdir frontend/src/components

Cùng xem cấu trúc cây thư mục sẽ như thế nào, ngoài các folders + files được generate bởi create-react-app, mình sẽ chia nhỏ các folder riêng, ở đây các components sẽ được viết ở folder

src/components


. ├── package.json ├── package-lock.json ├── public │ ├── favicon.ico │ ├── index.html │ ├── logo192.png │ ├── logo512.png │ ├── manifest.json │ └── robots.txt ├── README.md ├── src │ ├── App.css │ ├── App.jsx │ ├── components │ │ └── Home │ │ ├── index.js │ │ └── MainView.jsx │ ├── index.css │ ├── index.js │ ├── lib │ ├── reportWebVitals.js │ └── setupTests.js └── yarn.lock

Để cài đặt nhanh một vài dependencies cần thiết, hãy thêm packages trực tiếp vào package.json, ở react thì trước tiên mình sẽ cài

react-dom

,

react-router-dom



axios

để tạo request http lên server Node JS. Dependencies của react sẽ như thế này.


// package.json { ... "dependencies": { "@testing-library/jest-dom": "^5.11.4", "@testing-library/react": "^11.1.0", "@testing-library/user-event": "^12.1.10", "react": "^17.0.1", "react-dom": "^17.0.1", "react-scripts": "4.0.1", "web-vitals": "^0.2.4", "react-router-dom": "latest", "axios": "0.21.0" } ... }


$ cd todo/frontend $ npm install

Như vậy thì cài đặt cơ bản bước đầu đã gần như là hoàn thành.

Difference: Node JS vs React JS

React and Node.js are open-source JavaScript libraries that create user interfaces and server-side applications. Both are the most prominent front-end web development technologies, yet they are very different. The distinctions go beyond syntax and into each technology’s applications, abilities, and drawbacks. Understanding how they compete can help you determine the best fit for your strategic domains.

  • Node JS and React JS exhibit contrasting qualities that make both stand out in a user’s eye. When choosing to use Node JS in web development, it prioritizes individual module caching, making it highly adaptable. React JS promotes simple UI test cases supporting Android and iOS. It prioritizes the server and the front end, where code components can be reused. This encourages reduced debugging time resulting in a faster virtual DOM.
  • The minimal cons of Node JS include the lack of a well-stocked library. Also, asynchronous programming is utilized in lieu of linear blocking I/O programming. On the other hand, React JS is challenging for developers as it requires them to keep up with the continual introduction of new tools and technology.
  • Because of its asynchronous nature, Node JS can apparently also handle real-time data streaming. It can be utilized to broadcast media, data from many providers, file transfer, or as a WebSockets server. Node.js manages several connections at once. As a result, it’s ideal for an API service. Node.js is lightweight and speedy. As a result, it may be used to create microservices such as API gateways.
  • React JS is excellently suited for applications with several components, such as often changing statuses, user login, and access rights. Developers choose React.js to create websites with complicated structures that would be difficult to manage with a conventional method. As the application grows in size, it will enable you to keep track of all interactions.
Build a Full-Stack CRUD App Using React, Node, MySQL for Beginners
Build a Full-Stack CRUD App Using React, Node, MySQL for Beginners

Conclusion

In this article, we saw how big companies are making huge profits using React.js and Node.js technologies. It depends entirely on which technology we want to use to develop our application. For example, if we are developing a scalable server-side application, we can use NodeJS. Using NodeJS online streaming platforms is always a good option. Whereas ReactJS is the best option if we want to create an application with changing states such as dynamic buttons, inputs, etc.

To know more about ReactJS and NodeJS, you can enroll in the Post-Graduate Program in Full-Stack Web Development offered by Simplilearn in collaboration with Caltech CTME. This Web Development course is a descriptive online bootcamp that includes 25 projects, a capstone project, and interactive online classes. In addition to ReactJS and NodeJS, the course also details everything you need to become a full-stack technologist and accelerate your career as a software developer.

Simplilearn also offers free online skill-up courses in several domains, from data science and business analytics to software development, AI, and machine learning. You can take up any of these free courses to upgrade your skills and improve your career prospects.

[Node JS + React JS] – Phần 1 – Cài đặt cơ bản

Bài đăng này đã không được cập nhật trong 3 năm

Chào mọi người, lại là mình đây, sau chuỗi ngày vọc về server với hàng tá các command line khó nhớ thì hãy cùng mình đổi gió một xíu với series này nhé =]].

Hôm nay hãy cùng mình bắt đầu một tour về combo Node JS + React JS. Cả series chúng ta sẽ cùng tìm hiểu về combo ReactJS + Node JS qua những ví dụ cơ bản. Trong đó sẽ trải qua các nội dung như sau


Node JS + React JS – Cài đặt cơ bản


Kết nối React JS – Node JS


Authentication + Authorization


Node JS and Nosql database – mongodb


React JS & Redux state management

Series sẽ bắt đầu bằng những cấu hình cơ bản với nội dung là Cài đặt cơ bản và kết nối React JS + Node JS

Cài đặt các tool cần thiết

  • Cài đặt Nodejs


$ sudo apt-get install curl $ curl -sL https://deb.nodesource.com/setup_12.x | sudo -E bash - $ sudo apt-get install nodejs $ node -v $ npm -v

Link: https://tecadmin.net/install-latest-nodejs-npm-on-ubuntu

  • Cài đặt mongo db


$ wget -qO - https://www.mongodb.org/static/pgp/server-4.4.asc | sudo apt-key add - $ echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/4.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.4.list $ sudo apt-get update $ sudo apt-get install -y mongodb-org $ sudo systemctl start mongod $ sudo systemctl enable mongod

Link: https://docs.mongodb.com/manual/tutorial/install-mongodb-on-ubuntu/

Sau khi cài các ứng dụng cần thiết thì chúng ta đến bước cấu hình và cài đặt famework + dependencies.

Mình sẽ chia 2 folder để tách backend và frontend làm 2 project riêng.

React Node.js Video Sharing App Full Tutorial (Redux, JWT, Cookies) | MERN Stack Youtube Clone
React Node.js Video Sharing App Full Tutorial (Redux, JWT, Cookies) | MERN Stack Youtube Clone

Node JS vs React JS – The Difference

Aspect Node.js React.js
Type Runtime environment JavaScript library
Usage Server-side operations Front-end UI building
Framework Not a framework Part of MERN stack
Architecture Back-end operations Front-end UI components
Server Handles server operations Requires a server setup
DOM Manipulation No direct DOM manipulation Virtual DOM for updates
Ecosystem NPM for packages NPM for packages
Real-time Supports real-time apps Not designed for real-time
Server-side Rendering Possible but not its primary use Not focused on SSR

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Node JS vs React JS – The Difference

Aspect Node.js React.js
Type Runtime environment JavaScript library
Usage Server-side operations Front-end UI building
Framework Not a framework Part of MERN stack
Architecture Back-end operations Front-end UI components
Server Handles server operations Requires a server setup
DOM Manipulation No direct DOM manipulation Virtual DOM for updates
Ecosystem NPM for packages NPM for packages
Real-time Supports real-time apps Not designed for real-time
Server-side Rendering Possible but not its primary use Not focused on SSR

Let Our Experts Build the Web App You Need

Struggling to find an off-the-shelf solution that fits your needs? Our experienced web developers create custom apps designed specifically for your business goals. Leverage our expertise to get the precise web app you want.

MERN Stack Doctor Appointment Booking Website Using ReactJs, Node Js, MongoDB, Stripe | Mern Project
MERN Stack Doctor Appointment Booking Website Using ReactJs, Node Js, MongoDB, Stripe | Mern Project

NodeJS and ReactJS

NodeJS

NodeJS, developed by Ryan Dahl, is mainly powered by the V8 engine of Google chrome. The NodeJS technology is mainly a framework of JavaScript, and the backend of the application is made with JavaScript using NodeJS. As NodeJS uses event-driven and non-blocking models, it is considered a very efficient and lightweight framework. NodeJS is mainly used to access databases, host APIs, and serve HTTP requests.

So mainly NodeJS is an open source cross platform runtime environment and almost foe every type of project , it a very popular tool

Many tech giants and companies like Netflix, Uber, Trello are using NodeJS and making huge profits. Outside the browser , NodeJS runs the V8 engine and the core of the google chrome and for this reason NodeJS allowed it to be very performant.

Without creating a single thread for every request , in a single process NodeJS application runs. A set of asynchronous input output primitives in its standard library are provided by NodeJS. These primitives help to prevent the JavaScript from blocking .

Whenever the input and output operations like reading a request or accessing a database or accessing a file are done by NodeJS , then the operation is resumed by NodeJS when the response is returned instead of blocking the thread or wasting the CPU cycle waitings .

A thousand concurrent connections with a single server can be handled by NodeJS without introducing the burden of managing thread concurrency .

We can say NodeJS can be considered as an advantage for those frontend developers who write the client side code in JavaScript code only for browsers , now in addition they can use JavaScript for their server side code also and they do not need to learn any extra language for that.

Example:
Netflix:

We all are familiar with the OTT platform Netflix. It is one of the biggest platforms for online video streaming. The A/B testing is conducted by Netflix so that 209.18 million users can get a rich experience. However, the problems of app scalability and conditional dependencies are very common, and therefore, NodeJS is mainly used as it is a lightweight and high-speed technology.

Uber:

NodeJS is considered as one of the crucial tech solutions by the two-sided carpooling service like Uber. NodeJS enables scaling-up in line with the rising demand for their services.

Trello:

As we all know, Trello is used for managing projects, and it uses NodeJS for its server-side. Trello developers find NodeJS very useful because it can easily manage system updates that require a lot of open connections.

Features of NodeJS

  • The developers can perform non-blocking operations using NodeJS, making our web application faster.
  • NodeJS is an open-source and free framework.
  • Using NodeJS, the developers can make different servers such as the HTTP server, the TCP server, the DNS server, etc. There are many in-built APIs in NodeJS.
  • For quickly testing the ready code using NodeJS, unit testing is available in NodeJS called Jasmine.
  • To improve our application’s performance, the applications built using NodeJS can be scaled horizontally and vertically.
  • The standard ECMAScript can be used in NodeJS without any kind of problems.
  • We do not need to wait for our users to update the browsers , by choosing the version of NodeJS , we are in charge of deciding which ECMAScript version to use .

ReactJS

ReactJS was developed by a Facebook software engineer named Jordan Walke. ReactJS is mainly a front-end open source and a JavaScript front-end library used for building the user interfaces of our web applications or websites. There are many alternatives to ReactJS, such as AngularJs and VueJs. Initially, to show the news feed during chatting, React.js was used. Allowing the development of a dynamic library with high performance was the main motive of building the ReactJS.

From the New York Times to Twitter, the front-end library ReactJS is used in many content-based applications.

Many applications like Facebook rely mainly on user interactions with the user interface elements. Most of the dynamic elements of the Facebook web application are mainly built with the ReactJS front-end library.

Social web applications like Instagram, which Facebook maintains, also use ReactJS. For features like Google Map APIs and geolocations, Instagram uses ReactJS.

For the Gibbon platform of the video streaming applications like Netflix, the ReactJS library is used. This platform applies low-performance TV devices instead of DOM used in web browsers. The modularity, runtime performance, speed, etc., are provided to Netflix by ReactJS.

Now, let us discuss the key features of the ReactJS applications:

Features of React.js

  • The app performance is enhanced or improved due to the virtual DOM or Document Object Model in ReactJS because virtual DOM updates the component states or props without reloading the page.
  • Ensuring the high performance of the ReactJS, the debugger and the developer’s tools are provided to the developers.
  • The code stability and the better performance of the application are guaranteed in ReactJS because it uses unidirectional or downward data flow.
  • The rich UI native apps can be built using the same patterns of ReactJS, and these applications are supported by both the Android and the iOS mobile operating systems.

Now, let us go through the advantages and the disadvantages of NodeJS and ReactJS:

Advantages of NodeJS:

  • Caching of individual modules is done.
  • It is highly extensible.
  • Scaling can be done in both horizontal and vertical ways.
  • Using NodeJS, the JavaScript code can be converted to be made by the V8 engine of Google chrome.
  • As NodeJS handles many connections simultaneously, it is a good option for working with the API services.
  • For writing microservices like API gateway, NodeJS can be used because it is fast and lightweight.

Disadvantages of NodeJS:

  • Instead of following the linear I/O blocking, asynchronous programming is followed by NodeJS.
  • Though NodeJS has many features, a rich library is absent.

Advantages of ReactJS:

  • The code components can be reused in ReactJS.
  • It uses virtual DOM that provides better performance to our application.
  • Faster debugging is done.
  • It is supported by both mobile operating systems such as Android and iOS.
  • Easy UI test cases.

Disadvantages of ReactJS:

  • Sometimes it becomes difficult for the developers to keep pace with the newly released tools and tech.
  • Sometimes it becomes difficult or complex to learn using JSX and JavaScript.

Now let us discuss how we can connect Node with React,

We are going to use ExpressJs with NodeJs for creating the backend. ExpressJS is a rapid application development framework and using this framework we can build our application very quickly on the NodeJS platform.

Our First step will be to make a custom API in ExpressJS and then we are going to connect the API endpoint with the client side React application.

First you need to be sure that NodeJS is already installed in your system.

Let us make the client side react application first :

First install your React Application for your client side by writing the below command :

npx create-react-app client

Then run this default React application in your localhost:3000 by writing the command written below :

cd client

npm start

In your http://localhost:3000 you are going to see the application like following:

Now lets create the backend application:

For that go back to the parent directory by typing cd.. And the type the following command :

npx express-generator api

After writing this command an express application will be generated on NodeJS named api.

After that go to your api application folder by cd api and there type

npm install

This command will install all the required packages in your package.json file .

Now close the client application in your terminal with ctrl + c and the go back to your api folder in your terminal and then type the below command

npm start

Now you are going to see the standard default express application in your localhost:3000.

Now we will go to the bin folder and and will go www file and will change the port no from 3000 to 9000.

After changing the port number the www file will look like the following :

#!/usr/bin/env node

/**

* Module dependencies.

*/

var app = require(‘../app’);

var debug = require(‘debug’)(‘api:server’);

var http = require(‘http’);

/**

* Get port from environment and store in Express.

*/

//change the port number from 3000 to 9000

var port = normalizePort(process.env.PORT || ‘9000’);

app.set(‘port’, port);

/**

* Create HTTP server.

*/

var server = http.createServer(app);

/**

* Listen on provided port, on all network interfaces.

*/

server.listen(port);

server.on(‘error’, onError);

server.on(‘listening’, onListening);

/**

* Normalize a port into a number, string, or false.

*/

function normalizePort(val) {

var port = parseInt(val, 10);

if (isNaN(port)) {

// named pipe

return val;

if (port >= 0) {

// port number

return port;

return false;

/**

* Event listener for HTTP server “error” event.

*/

function onError(error) {

if (error.syscall !== ‘listen’) {

throw error;

var bind = typeof port === ‘string’

? ‘Pipe ‘ + port

: ‘Port ‘ + port;

// handle specific listen errors with friendly messages

switch (error.code) {

case ‘EACCES’:

console.error(bind + ‘ requires elevated privileges’);

process.exit(1);

break;

case ‘EADDRINUSE’:

console.error(bind + ‘ is already in use’);

process.exit(1);

break;

default:

throw error;

/**

* Event listener for HTTP server “listening” event.

*/

function onListening() {

var addr = server.address();

var bind = typeof addr === ‘string’

? ‘pipe ‘ + addr

: ‘port ‘ + addr.port;

debug(‘Listening on ‘ + bind);

Now go to the routes folder and make a file named restAPI.js , here we are going to make our custom API.

Write following code in testAPI.js :

const express = require(“express”)

const router = express.Router()

router.get(“/”,(req,res)=>{

res.send(“API works perfectly”);

})

module.exports=router

Now go to your app.js file and import the testAPI from routes folder and use it in your app .

After doing all the required changes in app.js , your app.js will look like the following :

var createError = require(‘http-errors’);

var express = require(‘express’);

var path = require(‘path’);

var cookieParser = require(‘cookie-parser’);

var logger = require(‘morgan’);

var indexRouter = require(‘./routes/index’);

var usersRouter = require(‘./routes/users’);

testAPIRouter = require(“./routes/testAPI”)

var app = express();

// view engine setup

app.set(‘views’, path.join(__dirname, ‘views’));

app.set(‘view engine’, ‘jade’);

app.use(logger(‘dev’));

app.use(express.json());

app.use(express.urlencoded({ extended: false }));

app.use(cookieParser());

app.use(express.static(path.join(__dirname, ‘public’)));

app.use(‘/’, indexRouter);

app.use(‘/users’, usersRouter);

app.use(“/testAPI”,testAPIRouter);

// catch 404 and forward to error handler

app.use(function(req, res, next) {

next(createError(404));

});

// error handler

app.use(function(err, req, res, next) {

// set locals, only providing error in development

res.locals.message = err.message;

res.locals.error = req.app.get(‘env’) === ‘development’ ? err : {};

// render the error page

res.status(err.status || 500);

res.render(‘error’);

});

module.exports = app;

Now again go to your terminal and go to the api folder , type npm start , after that open http://localhost:9000/testAPI and you are going to see the following page and that means that your custom API is working properly.

Now go to your client folder and there go to your src/App.js and edit it , so that we can fetch the API endpoint and we will show the data in your client side application .

After editing the App.js will look like the following :

import logo from ‘./logo.svg’;

import React from ‘react’

import ‘./App.css’;

class App extends React.Component{

constructor(props){

super(props)

this.state={apiResponse:””};

callAPI(){

fetch(“http://localhost:9000/testAPI”)

.then(res=>res.text())

.then(res=>this.setState({apiResponse:res}))

componentWillMount(){

this.callAPI()

render() {

return (

{this.state.apiResponse}

);

export default App;

Now go back to your api folder , here we need to set up one more thing that cross origin resource sharing so that our React application can communicate with backed which is running on a different port number , we must allow this setting otherwise it will block the request coming from other applications.

For that cross origin module needs to be installed globally within your api folder and for installing it , write the following command :

npm i –save cors

Now go to your app.js file of api folder and include cors

After doing all the changes the app.js file in your api folder will look like the following :

var createError = require(‘http-errors’);

var express = require(‘express’);

var path = require(‘path’);

var cookieParser = require(‘cookie-parser’);

var logger = require(‘morgan’);

const cors = require(“cors”)

var indexRouter = require(‘./routes/index’);

var usersRouter = require(‘./routes/users’);

testAPIRouter = require(“./routes/testAPI”)

var app = express();

// view engine setup

app.set(‘views’, path.join(__dirname, ‘views’));

app.set(‘view engine’, ‘jade’);

app.use(logger(‘dev’));

app.use(express.json());

app.use(cors())

app.use(express.urlencoded({ extended: false }));

app.use(cookieParser());

app.use(express.static(path.join(__dirname, ‘public’)));

app.use(‘/’, indexRouter);

app.use(‘/users’, usersRouter);

app.use(“/testAPI”,testAPIRouter);

// catch 404 and forward to error handler

app.use(function(req, res, next) {

next(createError(404));

});

// error handler

app.use(function(err, req, res, next) {

// set locals, only providing error in development

res.locals.message = err.message;

res.locals.error = req.app.get(‘env’) === ‘development’ ? err : {};

// render the error page

res.status(err.status || 500);

res.render(‘error’);

});

module.exports = app;

Now go back to your terminal, stop both the client and api folder and run them again .

Open your http://localhost:9000/testAPI :

You are going to see the following:

Then open your http://localhost:3000 and you are going to see how the data from the backend has been fetched to your frontend through an API call.

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Step 3: Create your React frontend

After creating our backend, let’s move to the frontend.

Open another terminal tab and use create-react-app to create a new React project with the name

client

:


npx create-react-app client

After that, we will have a React app with all of its dependencies installed.

The only change we have to make is to add a property called

proxy

to our package.json file.

This will allow us to make requests to our Node server without having to provide the origin it is running on (http://localhost:3001) every time we make a network request to it:


// client/package.json ... "proxy": "http://localhost:3001", ...

Then we can start up our React app by running its start script, which is the same as our Node server. First make sure to

cd

into the newly-created client folder.

After that, will start up on

localhost:3000

:


cd client npm start Compiled successfully! You can now view client in the browser. Local: http://localhost:3000

React Node.js Fiverr App Full Tutorial  | MERN Stack Freelance Service App w/ Stripe
React Node.js Fiverr App Full Tutorial | MERN Stack Freelance Service App w/ Stripe

Step 1: Create your Node (Express) backend

First create a folder for your project, called

react-node-app

(for example).

Then, drag that folder into your code editor.

To create our Node project, run the following command in your terminal:


npm init -y

This will create a package.json file which will allow us to keep track of all our app scripts and manage any dependencies our Node app needs.

Our server code will live in a folder of the same name:

server

. Let’s create that folder.

In it, we’ll place a single file, out of which we’ll run our server:

index.js

.

We’ll use Express to create a simple web server for us which runs on port 3001 if no value is given for the environment variable

PORT

(Heroku will set this value when we deploy our app).


// server/index.js const express = require("express"); const PORT = process.env.PORT || 3001; const app = express(); app.listen(PORT, () => { console.log(`Server listening on ${PORT}`); });

Then in our terminal, we will install Express as a dependency to use it:


npm i express

After that, we will create a script in package.json that will start our web server when we run it with

npm start

:


// server/package.json ... "scripts": { "start": "node server/index.js" }, ...

Finally, we can run our app using this script by running npm start in our terminal and we should see that it is running on port 3001:


npm start > node server/index.js Server listening on 3001

Conclusion

When it comes to making a conclusion about which is a better service provider, Node JS vs React JS, the focus is equally on both Java script formats. On the one hand, Node.js is an excellent framework for creating a server-side web application, such as an online streaming platform.

React.js is ideally suited for creating projects with developing states such as dynamic inputs, buttons, etc. You may also utilize both frameworks in the same project to disperse the confusion and look out for your advantage. You may create the backend with the Node.js framework and the front end with React.js. Netflix is the best representation of framework integration. Both paradigms have widespread and significant engagement. The decision between the two is based on your requirements and preferences.

Expert in Software & Web App Engineering

Parag Mehta, the CEO and Founder of Positiwise Software Pvt Ltd has extensive knowledge of the development niche. He is implementing custom strategies to craft highly-appealing and robust applications for its clients and supporting employees to grow and ace the tasks. He is a consistent learner and always provides the best-in-quality solutions, accelerating productivity.

A React frontend connected to a Node backend is a rock-solid combination for any application you want to build.

This guide is designed to help you create full-stack projects with React as easily as possible.

Let’s see how to set up an entire project using React and Node from scratch and deploy it to the web.

MERN Stack Tours & Travels Booking Website Design Using ReactJs, Node Js, MongoDB | Mern Project
MERN Stack Tours & Travels Booking Website Design Using ReactJs, Node Js, MongoDB | Mern Project

Become a Professional React Developer

React is hard. You shouldn’t have to figure it out yourself.

I’ve put everything I know about React into a single course, to help you reach your goals in record time:

Introducing: The React Bootcamp

It’s the one course I wish I had when I started learning React.

Click below to try the React Bootcamp for yourself:

React.js Vs. Node.js

Node.js and React.js are both JavaScript technologies, but they are different things. The primary difference between Node.js and React.js is that Node.js is a back-end framework, and React is used to develop user interfaces. But, they both have advantages and disadvantages with special use cases.

Read if you want to know which one we have to use for our next JavaScript project. Below we see the features of Node.js and React.js and the pros and cons of both Node and React. We can decide which will suits our project best and according to the need after reading this article.

Let’s start.

What is Node.js?

Node.js is a multiplayer cross-platform runtime environment and an open-source platform that can be used to execute the JavaScript driver code of the browser.

Most people are respected and understand that it is a brand or a programming language. Almost person Node.js for creating back-end services like API, web applications, or mobile applications.

Node.js is a technology that can be used to build a back-end, which is used to use JavaScript.

Google Chrome’s V8 JavaScript engine powers Node.js.

Node.js is an efficient and light-weighted technology because it is used as an event-driven and non-blocking I/O model. Developers use this framework for hosting the APIs, which serve the HTTP requests and access the database equally.

Code: Below is an example which includes the HTTP module to building the servers.

File name: App.js

JavaScript

Output: Go to terminal and write the command to compile the nodejs file:

node folder_name.js

Now, open the localhost:8080 in the browser for output.

Who uses Node.js?

Node.js is used by famous clients and companies like Netflix, Trello, and Uber. Below, we explain why Node.js has become their framework of choice.

The online video streaming leader, Netflix, conducts A/B testing to provide 93 million< users with a rich experience.

The platform faces some issues with application stability and conditional dependencies. The company chose Node.js for its speed and lightness in solving these problems. In this way, Netflix reduced the start-up time by 70% more.

Trello is an application of project management and uses server-side Node.js. The Trello team has found the Node good and useful for system updates that require many connections.

Uber is a two-way carpooling service and said Node.js is the most crucial technological solution. The framework enables up scaling in line with the growing service demand.

Node JS Key Features

Now let’s find out the main Node.js features.

What Is React.js?

React.js is an open-source Javascript library used to develop user interfaces for websites and web apps in a structured way. React.js allows the development of a dynamic, high-performance library.

For example, the technology displays news feeds while people chat. The alternatives to React js is Angular and Vue.js.

It is efficient, declarative, and flexible and allows the creation of reusable UI components. It is mainly used in hard, interactive one-page web projects and responsive sites which are difficult to reuse.

The virtual DOM algorithm from React is a time-consuming and inaccurate write code. A React application consists of components, each responsible for reproducing the small and reusable piece of HTML.

Components are embedded in the components, allowing complex applications to be built of simple building blocks.

Create a react project and edit the App.js file in the src folder like below:

FilePath:- src/App.js:

Javascript

Output

Who uses React.js?

Facebook itself develops the react.js framework. React.js is used for content-based websites like “The New York Times” to apps like Twitter. Now let’s check the apps that use this directory.

Facebook is heavily dependent on user interaction with the website elements. Almost all the dynamic elements of any Facebook web app are built with React.js.

Instagram is a good example of successful React use. The app will use React for Google Maps geolocation, APIs, and other features.

Netflix uses React.js for its Gibbon platform. The platform uses low-performance TVs instead of DOMs used in web browsers.

The React.js library is used for doing the Netflix team to improve the runtime performance, modularity, and speed of the site.

React.js was handy for adding a dynamic online multicurrency calculator to a two-way marketplace.

React.js main features

Now compare React and Node.js.

Comparison between both the Node js and React js.

Both React.js and Node.js are different technologies which will be used to develop different parts of any web app.

Below, we compare React with Node js and the advantages and disadvantages.

The difference between Node.js and React.js are below:
Which is the better option (Node js Vs React js)?

Both Node.js vs React.js is modern technologies used by many successful companies.

But what do you choose for our suggested application? Let us give you a clue.

If you want to create a scalable yet sophisticated server-side web application as an online streaming platform, then you can choose Node JS.

React.js is better for creating the project with changing modes such as dynamic inputs, buttons and many other options.

We can use both technologies for our web apps at the same time. You can create the web app’s front end with the help of React and make the back end with the Node js, as Netflix did.

Conclusion:

When we create a server-side web application, like an online streaming platform, then Node.js will be an excellent framework.

When you want to do a project with dynamic inputs and buttons, React.js is a better option.

You can use both frameworks for a single project as well. The Node.js framework can be used to create the backend, while React.js will be used to create the front-end part.

Netflix is an example of framework integration. Both frameworks have a significant and committed community. We hope that this article can clarify the differences between Node.js and React.js.

Frequently Asked Questions (FAQs)

Which is better: Node.js or React.js?

As above discussed:

Both Node.js and React.js have their use cases. They should be used together in a project. So it is not just making a comparison.

Does React.js need Node.js?

No, react.js does not need Node.js.

React.js is frontend or backend?

React.js is a front-end development application.

Is Node.js easier than Java?

It is similar to comparing apples to oranges. But it would be highlighted that Java is a comprehensive language and can justly be described as the tougher of the two.

Next Topic#

Node JsReact Comparison: Which to Choose for Your JS Project?

Both Node.js and Reac.js are JavaScript technologies, yet both of them are entirely different things. The main difference between Node.js and React.js is, while Node.js a back-end framework, React is used for developing user interfaces. Still, they both have advantages and disadvantages, as well as particular use cases.

If you want to find out which one you should use for your next JavaScript project, read on. Below we share the key features of Node.js and Reac.js and their pros and cons. After reading this article you will have a clear picture of what technology suits your project needs.

Let us start.

When to Use React Over Node.js?

React is a frontend library primarily used for building the user interface of web applications. It allows you to build reusable UI components and efficiently update the UI when data changes occur. These features make it an excellent choice for creating complex and dynamic web apps, such as e-commerce sites, streaming platforms, social networks, dashboards, and analytics pages.

Below are examples of popular applications using React in their application stack.

  • Facebook – React originated from Facebook, so it’s not surprising that it’s used in the social networking app’s application stack. Facebook uses React to create complex and interactive UIs without the need for page reloads, resulting in a smooth and efficient user experience. React allows Facebook to declaratively describe its UI and efficiently update the actual DOM, improving the performance of its application.

  • Instagram – Like Facebook, Instagram uses React to build a complex UI that provides an enjoyable experience for its users, as well as in some other features, such as tags, geolocation, and search.

  • Dropbox – Dropbox is another example that proves React can be used to create any type of complex and high-performance interface. The cloud-based file hosting platform employs React in its stack to provide advantages such as smaller file sizes and faster reloading speeds, making the application more user-friendly.

  • Netflix – Another popular React use case is Netflix’s React-Gibbon UI architecture. The streaming platform leverages Reacts’ declarative approach to UI development and one-way data flow model to create a high-performance and seamless experience for its user base.

[ Part 1 ] - Code MERN Blogging website | Fully Working Blog Editor ( MongoDB, ReactJS, Nodejs )
[ Part 1 ] – Code MERN Blogging website | Fully Working Blog Editor ( MongoDB, ReactJS, Nodejs )

What is NodeJS?

Node JS is a JavaScript runtime environment that is open-source and cross-platform. The value of this technology rests in its ability to write server-side and client-side scripts. Node JS businesses utilize the same scripting language for both activities. It saves a developer’s time.

Node.js is a cross-platform open-source runtime environment for running JavaScript code outside a browser. It’s important to note that NodeJS is not a framework or a programming language. Most people are misguided and believe that the Bit is a blueprint or a scripting language. We frequently utilize Node.js to create backend services such as APIs, Web Apps, and Mobile Apps.

Kết nối frontend – backend

Backend:
Hãy bắt đầu với một controller nhận request đơn giản nhất –

top_pages_controller.js

.


// todo/backend/controllers/api/top_pages_controller.js exports.index = function (req, res, next) { res.json({message: "Top Page"}) }


// todo/backend/config/api.routes.js var TopPages = require('../controllers/api/top_pages_controller.js'); module.exports = function(router) { router.get('/top_pages', TopPages.index); }

Server Node JS sẽ chạy ở port 4000


node server.js

Frontend

Đến đây chúng ta sẽ thử gọi request lên server NodeJS nhé. Để bắt đầu, hãy tạo một http request với axios ngay ở component App.
Với package

axios

, chúng ta dễ dàng tạo một

XMLHttpRequests

từ browser.


// App.jsx import './App.css'; import React from 'react'; import axios from 'axios'; class App extends React.Component { constructor(props) { super(props); } state = { message: null } componentDidMount() { axios.get('http://localhost:4000/api/top_pages') .then(res => { let message = res.data.message; this.setState({message: message}); }, err => { console.log(err) }); } render() { return (

Front end

Message from backend:

{this.state.message}

); } } export default App;

App react local sẽ chạy ở localhost:3000


npm run start

Lưu ý :
Đến đây hãy mở lại trang web react qua

localhost:3000

để kiểm tra xem frontend có thể gọi đến backend hay chưa. Trường hợp bị block do Cors thì hãy kiểm tra lại ở NodeJS đã cài package cors cũng như đã allow request chéo từ domain của react js hay chưa.

Hãy thêm domain của react vào biến

whitelist

ở file server.js nhé. Ở đây server react js của mình chạy ở

localhost:3000

nên ở properties của mình sẽ là

CORS : ['http://localhost:3000']

Còn đây là kết quả của bài viết hôm nay. React JS nhận được message response từ NodeJS

Như vậy là phần 1 với nội dung Cài đặt cơ bản và kết nối React JS + NodeJS đã xong, hãy đón đọc tiếp những phần sau của series nhé =]].

Repos:

All rights reserved

Quick Overview:NodeJS vs ReactJS: both JavaScript programming frameworks. Although the two languages share remarkable correspondences, they are not the same.

Node.js Tutorial for Beginners: Learn Node in 1 Hour
Node.js Tutorial for Beginners: Learn Node in 1 Hour

React JS Development Services

ReactJS Development Services Includes:

  • Enterprise Software Development is a form of software transformation in which developers work on complicated initiatives that include third-party services and patronage programs that may cause hindrances throughout the integration process.
  • Software designed for the entertainment and media industries that utilize React JS enables users to captivate their consumers with top-notch, adaptive, on-demand alternatives, all of which provide distinctive digital experiences.
  • Offering a comprehensive spectrum of premium web application development services, beginning with business analysis and UI/UX design and progressing to front-end and back-end programming, QA testing, maintenance, and support.
  • Banking software services that provide custom-tailored applications with desired bespoke features, UX/UI design, and security.

Overview of Node.jsReact

Node.js and React are two popular technologies that are widely used in the development of full-stack web applications. Both are based on the JavaScript programming language and share some features, but they serve different purposes and are sometimes used together to develop different parts of a web application.

Node.js is often used for building the backend (the server or the part that has access to data and that which users cannot interact with) of an application, while React is used for building the frontend (the client or user interface with which users interact with).

Node.js is an open-source, cross-platform runtime environment that allows developers to run JavaScript on the server side. It is built on Chrome’s V8 JavaScript engine and is designed to build a scalable network and event-driven applications. Node.js is often used for building APIs, real-time web applications, and other server-side applications.

React, also known as React.js, is a JavaScript library for creating user interfaces. It was created by Facebook and is well-known for its declarative approach to user interface development. React enables developers to create complex interfaces using reusable UI components that can be efficiently updated when data changes. It is multipurpose and is often used to create single-page applications and mobile applications.

React Node.js MySQL CRUD Tutorial for Beginners
React Node.js MySQL CRUD Tutorial for Beginners

Node.jsReact.js: Is Node.js Better than React?

Well, if you’ve read this article up to this point, you should by now already know the right answer to this question.

Node.js and React are two different technologies that are often used together in the development of web applications, and directly comparing them would be absurd. However, this article has provided you with the guidance and knowledge you need to differentiate the two, as well as examples of their use cases.

In conclusion, each technology has its own strengths and areas of focus, and the choice of which one to use depends on the specific requirements of the application or project you’re building.

Download the best JavaScript frameworks guide to answer the ‘which JavaScript framework to use for your next project?’

Node.js vs React.js: which to choose for your web app project

With JavaScript being one of the most popular languages out there, with so many JavaScript frameworks to choose from. Node.js and React.js are two of the most popular options out there, but developers sometimes struggle to know which one is better.

The main difference is that Node.js is a back-end framework, and React.js is used for developing user interfaces. Both frameworks are quite popular and have their advantages and disadvantages.

React Overview:

React.js is an open-source JavaScript library. This front-end framework allows you to develop user interfaces for websites and apps in an organized way. React is loved for its high performance.

React was developed by Facebook for everything from content-based websites to mobile apps. Both Facebook and Instagram apps were developed with React. The library of React.js also helps Netflix improve runtime performance, modularity, and rapidity.

Features of React.js

Node.js Overview:

In basic terms, Node is an open source cross-platform library for server-side programming that permits clients to develop web applications rapidly. With Node, we can execute JavaScript applications or network applications. Its basic modules are engraved in JavaScript.

It is generally utilized for server applications in real-time. Node.js permits JavaScript to execute locally on a machine or a server.

Node.js gives numerous systems to utilize. One of such structures is Express.js. It is more valuable and mainstream than the different structures of Node.js.

Features of Node.js

Node JS vs. React JS Comparison:

Conclusion:

When we create a server-side web application, like an online streaming platform, then Node.js will be an excellent framework.

When you want to do a project with dynamic inputs and buttons, React.js is a better option.

You can use both frameworks for a single project as well. The Node.js framework can be used to create the backend, while React.js will be used to create the front-end part.

Netflix is an example of framework integration. Both frameworks have a significant and committed community. We hope that this article can clarify the differences between Node.js and React.js.

Trong bài viết này, tôi muốn cho bạn thấy cách build front và back-end của một website sử dụng NodeJS làm back-end. Chúng ta sẽ dùng node để tạo các endpoint, và setup một database bằng format JSON. Sau đó, tạo 1 ứng dụng trên front-end sử dụng React để post và database, cũng như là truy vấn data từ nó.

Ví dụ, tôi sẽ tạo 1 guestbook để user có thể submit tên của họ kèm 1 tin nhắn. Bởi vì user sẽ không cần phải login, hoặc nhận bất kỳ data nào, tôi sẽ không cần phải lưu trữ bất kỳ cái gì. Sau đây lác cách chúng ta sẽ làm:

Về cơ bản là làm tất cả trên cùng 1 page, bao gồm 1 cái form để submit message vào guestbook. Để làm nó hoạt động, chúng ta sẽ bắt đầu bằng việc tạo ra các endpoint cho các request POST và GET rồi setup database, deploy nó, vì vậy có thể tạo thành ứng dụng React và kéo data từ API về.

Sau đây là danh sách các thứ tôi sẽ làm. Bạn có thể làm cách khác. Nhưng cách này hợp lý đối với tôi, bởi vì mỗi bước sẽ làm nền tảng cho bước tiếp theo. Trong suốt bài tập này, tôi sẽ đi từng bước chi tiết.

Để xem kết quả, đây là link của nó

BƯỚC 1:

Database bao gồm 2 item:

  1. Tên của user
  2. Message của user

Nếu bạn chưa xong, hãy install MongoDB và chạy nó trên cổng 27017. Sau đó, chúng ta sẽ tạo database trên command line.

> Show dbs
> Use signatures
switched to db signatures
> show collections
> db.createCollection(guest_signatures)

Xong, đổi sang text editor và tạo các model cho database

BƯỚC 2:

Dùng command line để bắt đầu tạo 1 ứng dụng nhanh. Tạo 1 thư mục mới, dùng npm init để tạo app, nó sẽ tự động tạo file pkg.JSON

Đây là app cơ bản nhất, chúng ta chỉ cần 2 file khác, một file dùng làm các route. Tôi cũng sẽ include tất cả các dependency trong file này. File còn lãi dùng cho các model/schema. Chúng ta sẽ giải quyết file về model trước. Nó nên giống thế này:

const mongoose = require(‘mongoose’);
let Schema = mongoose.Schema;
const signatureSchema = new Schema({
guestSignature: {
type: mongoose.Schema.Types.Mixed,
required: true,
},
message: {
type: mongoose.Schema.Types.Mixed,
required: true,
},
})
const Signature = mongoose.model(‘Signature’, signatureSchema);
module.exports = Signature;

BƯỚC 3:

Trước khi tạo endpoint ở đây, hãy list ra danh sách các dependency bên trên cùng của file. Chúng ta cũng không cần quá nhiều.

//====LIST DEPENDENCIES===//
const express = require(‘express’);
const parseurl = require(‘parseurl’);
const bodyParser = require(‘body-parser’);
const path = require(‘path’);
const expressValidator = require(‘express-validator’);
const mongoose = require(‘mongoose’);
const Signature = require(‘./models/signature.js’)
const app = express();
const url = ‘mongodb://localhost:27017/signatures’;
//=========================//

Bạn không cần phải connect với mongoose, vì vậy thoải mái dùng MongoClient nếu thích. Chúng ta cũng dùng Signature schema được tạo ở bước trước.

Xong, giờ tạo các endpoint. Chỉ cần 1 model để read và write vào, vì vậy chúng ta sẽ có 2 endpoint

  1. Ở thư mục root “/”, chúng ta sẽ redirect đến API
  2. API, chúng ta gọi “/api/signatures” để read/write vào

Chúng ta sẽ gọi GET và POST từ API endpoint sử dụng find() và create(). Và kết quả trả về sẽ là JSON, dễ dàng sử dụng data từ React. Đây là các endpoint:

//====ROOT DIRECTORY===//
app.get(‘/’, function(req, res) {
res.json(‘you did it’);
});
//==========================//
//====GET ALL SIGNATURES===//
app.get(‘/api/signatures’, function(req, res) {
Signature.find({}).then(eachOne => {
res.json(eachOne);
})
})
//==========================//
//====POST NEW SIGNATURE===//
app.post(‘/api/signatures’, function(req, res) {
Signature.create({
guestSignature: req.body.SignatureOfGuest,
message: req.body.MessageofGuest,
}).then(signature => {
res.json(signature)
});
});
//==========================//

Có 1 cái tôi quên nhắc đến là req.body.SignatureOfGuest và req.body.MessageofGuest. Mọi thứ trong đoạn trên đều đề cập đến những thứ mà chúng ta đã tạo như database, collections và các model. Nó cũng nhắc đến tên của các trường mà chúng ta sẽ sử dụng trong React, input sẽ dùng tên SignatureOfGuest và MessageofGuest. Vì vậy, chúng ta cần nhớ nó trong đầu nhé.

BƯỚC 4:

Giờ chúng ta sẽ kết nối vào local database từ text editor.

const url = ‘mongodb://localhost:27017/signatures’;

Chúng ta sẽ viết một function sử dụng constant này để kết nối đến local database

//====MONGOOSE CONNECT===//
mongoose.connect(url, function (err, db) {
if (err) {
console.log(‘Unable to connect to the mongoDB server. Error:’, err);
} else {
console.log(‘Connection established to’, url);
}
});
//==========================//

Để đảm bảo mọi thứ hoạt động đúng, chúng ta cũng cần add một cái app.listen vào cuối file.

Ở điểm này, đây là ý tưởng tốt để tạm dừng và đảm bảo rằng các endpoint và kết nối local có hoạt động. Bạn có thể làm nó bằng cách dùng Postman để tạo các request GET/POST. Nếu các endpoint hoặc kết nối không làm việc, bạn nên chẩn đoán vấn đề dựa trên các báo lỗi nhận được. Nếu mọi thứ ok, nó sẽ cho phép read/write vào database.

Một khi mọi thứ đã ok, cũng là lúc tạo 1 account trên Heroku và Mlab.

BƯỚC 5:

Đăng ký một tài khoản Heroku

here

. Tạo một tài khoản mLab

here

BƯỚC 6:

  1. Sau khi tạo tài khoản mLab, click vào nút Create New và chọn Single node sandbox. Có nhiều lựa chọn tốn phí, nhưng sandbox có rất nhiều thứ để bắt đầu. Đặt tên cho database, tôi dùng cùng tên với database mLab
  2. Tạo xong database, bạn có thể bắt đầu một collection mới
  3. Bạn cũng sẽ cần add một User hoặc nhóm các User kết nối vào database. Nếu không làm bước này mà add chính bạn như là User thì khi truy cập sẽ bị fail khi deploy.

Xong, database đang chạy trên mLab. Khi bạn click và database sẽ thấy vài thông tin bên trên cùng nói rõ cách kết nối kiểu như:

mongodb://

:

@ds79234.mlab.com:9234/signatures

Url của database phải bao gồm username và password, thay chúng bằng username và password của bạn.

Quay trở lại text editor, đang có 1 db chạy local tại:

const url = ‘mongodb://localhost:27017/signatures’;

Để thay đổi kết nối thành mLab, chỉ cần edit biến trong url với các thông tin của mLab, giống như vầy:

const url = ‘mongodb://username:[email protected]:9234/signatures’;

Tuy nhiên, nếu bạn hay dùng github hoặc một nơi công cộng khác và không muốn lộ username/password? Hãy set một biến môi trường trong command line kiểu như:

export MONGOLAB_URI=”mongodb://username:[email protected]:9234/signatures’;

Dĩ nhiên, thay username/password/numbers và database thành của bạn. Giờ quay lại text editor và đổi biến url như sau:

const url = process.env.MONGOLAB_URI;

Thay đổi app.listen qua cổng mới:

app.listen(process.env.PORT || 3000);
console.log(‘starting applicaiton. Good job!’);

Với cách này sẽ chạy từ mongolab, nhưng nếu nó không thể tạo kết nối, nó sẽ chạy trên cổng mặc định là 3000. Câu lệnh trên cũng cho phép bạn chạy app trên local hoặc từ mlab, trong trường hợp bạn muốn test phiên bản local.

Bước cuối cùng là tạo kết nối để triển khai code của bạn trên Heroku. Để làm việc này, hãy sử dụng câu lệnh sau trên command line:

heroku config:set MONGOLAB_URI=mongodb://username:[email protected]:9234/signatures

Xong, ứng dụng của bạn đã triển khai thành công trên Heroku. Nếu xảy ra lỗi, check xem nó có đang chạy local hay không, nếu có, có thể nó là lỗi kết nối.

BƯỚC 7:

Dùng lệnh ‘create-react-app’ trên command line để tạo app React.

BƯỚC 8:

Bây giờ chúng ta tạo form với input để user nhập thông tin. Sau đây là cách làm.

  1. Trong một component mới, tạo class mới.

class GuestBook extends Component

2. Sử dụng một constructor và super method.

constructor(props) {
super(props);

3. Sử dụng keyword này để handle tên user và message rồi bind nó vào (this)

this.handleSignatureOfGuest = this.handleSignatureOfGuest.bind(this);
this.handleMessageofGuest = this.handleMessageofGuest.bind(this);

4. Set trạng thái của tên và message của guest thành chuỗi rỗng.

this.state = {
SignatureOfGuest: “”,
MessageofGuest: “”,
};

5. Lắn nghe trạng thái của name và message từ các sức kiện.

handleSignatureOfGuest(event) {
this.setState({ SignatureOfGuest: event.target.value });
}
handleMessageofGuest(event) {
this.setState({ MessageofGuest: event.target.value });
}

6. Tạo một function thay đổi name và message theo giá trị của input.

addToGuestBook = event => {
event.preventDefault();
this.setState({
SignatureOfGuest: event.target.value,
MessageofGuest: event.target.value,
});

7. Tôi sử dụng axios để post data vào database trên heroku.

axios.post(‘

‘, {
SignatureOfGuest: this.state.SignatureOfGuest,
MessageofGuest: this.state.MessageofGuest,
})
.then(response => {
console.log(response, ‘Signature added!’);
})
.catch(err => {
console.log(err, ‘Signature not added, try again’);
});

8. Sau đó tôi reset trạng thái của input thành empty.

this.setState({
SignatureOfGuest: “”,
MessageofGuest: “”,
});
};

9. Cuối cùng, chúng ta tạo method để render ra page cùng với các trường. Bên trong các trường, chúng ta đặt onChange, name, value. onChange sẽ được set vào các trường this.handlemessage hoặc this.handlename.

10. Gắn nút submit

BƯỚC 9:

Bây giờ chúng ta tạo một component khác để render data đã lưu trong database. Sau đó có thể export component đó và đặt vào guestbook page.

Bên trong component chúng ta sẽ làm như sau:

  1. Trong một component mới, tạo 1 class mới.

class GuestNames extends Component {

2. Chúng ta sử dụng constructor và super method.

constructor(props) {
super(props);

3. Dùng this.state để set trạng thái của message thành empty.

this.state = {
messages: “”,
};

4. componentDidMount

componentDidMount() {

5. Fetch data từ database.

fetch(‘

‘)
.then(results => {
return results.json();

6. Map data và trả về dữ liệu chúng ta muốn.

data.map((msg) => {
return(

{msg.message}

Node JS Development Services

NodeJS Development Services Includes:

  • Customization of Node.js, i.e., the inclusion of customized features and changes to meet the needs of your venture.
  • Design of microservices APIs, which resulted in increased server-side application performance.
  • Integration solution for Node.js that can connect Node.js with your existing corporate system by creating APIs to enhance functionality.
  • Mobile app services in Node.js that help design real-time, collaborative, cross-platform, responsive, and intelligent native mobile apps.
  • Plugin creation in Node.js to create the backend in JavaScript, wherein designated and professional engineers customize Node.js plugins.
  • Development of backend dashboards assistance in developing a web backend and an app with a web backend.
  • js consulting, development, and support that incorporates the provision of complete development life cycle management, deployment, and maintenance for the project.
  • API development in Node.js provides greater security, a lighter workflow, and a more pleasant user experience.
  • js for UX/UI design focuses on providing real-time web services to help create innovative and memorable UI/UX.
  • Development of Express.js applications that include the creation of lightweight, user-friendly, and interactive online and mobile apps using Express.js, a fast, opinionated, minimalist Node.js web framework.
  • We are giving ease, sustainability, and structural norms to Node JS applications with the assistance of other lightweight frameworks.
Nodejs VS Expressjs VS Nextjs - See the differences 🌟
Nodejs VS Expressjs VS Nextjs – See the differences 🌟

Node js + React JS ?

Node.js là một hệ thống phần mềm được thiết kế để viết các ứng dụng internet có khả năng mở rộng, đặc biệt là máy chủ web. Chương trình được viết bằng JavaScript, sử dụng kỹ thuật điều khiển theo sự kiện, nhập/xuất không đồng bộ để tối thiểu tổng tài nguyên và tối đa khả năng mở rộng. Node.js bao gồm có V8 JavaScript engine của Google, libUV, và vài thư viện khác.

Với nhiều ưu điểm, thì NodeJs đang phát triển rất nhanh với cộng đồng hỗ trợ lớn.


NodeJs viết bằng Javascript nên có cộng đồng hỗ trợ cực lớn, nên những vấn đề gặp phải sẽ nhận được sự support rộng rãi so với nhiều framework khác.


Hiệu năng cao + real time: NodeJs với cơ chế xử lý bất đồng bộ – non-blocking giúp NodeJs tiếp nhận và xử lý hàng ngàn request một lúc mà không gặp một khó khăn nào.


Dễ dàng mở rộng.


JSON API – Với javascript thì NodeJS + Nosql làm server là sự lựa chọn số 1 cho JSON API.

Với ứng dụng NodeJs thì một framework nhỏ mà mạnh mẽ thường được sử dụng là Express Js. Ở bài viết này chúng ta sẽ tiến hành cài đặt và cấu hình Express Js cho ứng dụng.

React JS đang là một trong những thư viện phổ biến nhất giới frontend. Sử dụng React Js để build các ứng dụng front-end với hiệu năng cao và thời gian xây dựng nhanh nhất có thể.

Conclusion

When it comes to making a conclusion about which is a better service provider, Node JS vs React JS, the focus is equally on both Java script formats. On the one hand, Node.js is an excellent framework for creating a server-side web application, such as an online streaming platform.

React.js is ideally suited for creating projects with developing states such as dynamic inputs, buttons, etc. You may also utilize both frameworks in the same project to disperse the confusion and look out for your advantage. You may create the backend with the Node.js framework and the front end with React.js. Netflix is the best representation of framework integration. Both paradigms have widespread and significant engagement. The decision between the two is based on your requirements and preferences.

Expert in Software & Web App Engineering

Parag Mehta, the CEO and Founder of Positiwise Software Pvt Ltd has extensive knowledge of the development niche. He is implementing custom strategies to craft highly-appealing and robust applications for its clients and supporting employees to grow and ace the tasks. He is a consistent learner and always provides the best-in-quality solutions, accelerating productivity.

Connecting React.js with Node.js: A Bit-by-Bit Guide

Connecting React.js to Node.js involves setting up a client-server architecture where React.js serves as the front-end (client) and Node.js serves as the back-end (server) of your application. This allows your React.js application to make requests to the Node.js server to fetch data or perform other server-side operations. Here’s a step-by-step guide on how to connect React.js to Node.js:

1. Set up Node.js Server:

Start by creating a Node.js server that will handle API requests from your React.js application. You can use a framework like Express.js to simplify this process. Make sure you have Node.js and npm (Node Package Manager) installed on your machine.

# Create a new directory for your project mkdir my-react-node-app cd my-react-node-app # Initialize a new Node.js project npm init -y # Install Express.js npm install express

Now, create an Express.js server in a file (e.g., server.js):

const express = require(‘express’); const app = express(); const port = 3001; // or any other port you prefer app.get(‘/api/data’, (req, res) => { // Handle your API logic here const data = { message: ‘Hello from the server!’ }; res.json(data); }); app.listen(port, () => { console.log(`Server is running on port ${port}`); });

2. Create a React.js App:

Next, create a React.js application using create-react-app or your preferred method:

npx create-react-app my-react-app cd my-react-app

3. Make API Requests from React.js:

Inside your React.js application, you can use libraries like axios or the built-in fetch to make API requests to your Node.js server.

First, install axios:

npm install axios

Then, in your React component, you can make a GET request to your Node.js server:

import React, { useEffect, useState } from ‘react’; import axios from ‘axios’; function App() { const [data, setData] = useState(”); useEffect(() => { axios.get(‘/api/data’) .then(response => { setData(response.data.message); }) .catch(error => { console.error(error); }); }, []); return (

React and Node.js Integration

Message from the server: {data}

); } export default App;

4. Start Both the Server and React App:

In separate terminal windows, start your Node.js server and React.js application:

For the Node.js server:

node server.js

For the React.js application:

npm start

Now, your React.js app will be able to communicate with your Node.js server by making requests to the ‘/api/data’ endpoint. You can expand upon this foundation by creating more API endpoints on the server and adding more functionality to your React.js front-end as needed.

  • JAMstack

NodeReact: The Difference and Which Framework to Choose

Before reading this article, you may have been wondering, is Node.js a programming language or framework?

Or is it a JavaScript library?

What about React? Is it a JavaScript frontend framework or library?

When and where should I use React.js or Node.js in my next web development project?

If you’ve been in web development for a while now, then you likely must have heard about React (or React.js) and Node.js (sometimes called Node). However, confusion about which is which often arises because both React and Node.js are two popular technologies that are frequently used together in the development of modern web applications.

While it’s common for people new to the field of web development to confuse these distinct technologies, our goal in this article is to provide you with sufficient knowledge about each technology, their similarities, differences, advantages and disadvantages, and their possible use cases.

By the end of this article, you should have a good understanding of React and Node.js and when to use them in your projects.

Build app using React JS, Node Express JS and Mongo DB (MERN Stack)
Build app using React JS, Node Express JS and Mongo DB (MERN Stack)

Node JSReact JS Comparison

Both React.js and Node.js are different technologies used to develop different parts of a web app. Below, we compare React with Node js, their pros, cons, and usage so you can compare them for your proposed project.

SWIFT VS REACT NATIVE: WHICH ONE IS BETTER TO CHOOSE WHEN DEVELOPING YOUR APP FOR IOS

Node.js

React.js

Developed by

Jordan Walke, a Facebook employee

Type

An open-source framework, for writing code and generating dynamic web page content.

ReactJS is an open-source, client-side library for delivering high-performance dynamic apps.

Latest Version

12.9.0 / August 20, 2019;

16.8.6 / May 6, 2019

Advantages

Disadvantages

Use cases

Popularity among the developer community

63,976 stars on Github

135,401 stars on Github

Hourly developer rate

Based on the Upwork info, the Node.js hourly rate may vary:

According to the Upwork, the hourly rates would vary following way:

KOTLIN VS. JAVA: WHAT TO CHOOSE FOR AN ANDROID APP?

Step 5: Deploy your app to the web with Heroku

Finally, let’s deploy our application to the web.

First, within our client folder, make sure to remove the Git repo that is automatically initialized by create-react-app.

This is essential to deploy our app, because we are going to set up a Git repo in the root folder of our project (

react-node-app

), not in

client

:


cd client rm -rf .git

When we deploy, both our Node backend and React frontend are going to be served on the same domain (i.e. mycoolapp.herokuapp.com).

We see how our requests are being handled by our Node API, so we need to write some code that will display our React app when it is requested by our user (for example, when we go to the home page of our app).

We can do this back in

server/index.js

by adding the following code:


// server/index.js const path = require('path'); const express = require('express'); ... // Have Node serve the files for our built React app app.use(express.static(path.resolve(__dirname, '../client/build'))); // Handle GET requests to /api route app.get("/api", (req, res) => { res.json({ message: "Hello from server!" }); }); // All other GET requests not handled before will return our React app app.get('*', (req, res) => { res.sendFile(path.resolve(__dirname, '../client/build', 'index.html')); });

This code will first allow Node to access our built React project using the

express.static

function for static files.

And if a GET request comes in that is not handled by our

/api

route, our server will respond with our React app.

This code allows our React and Node app to be deployed together on the same domain.

Then we can tell our Node App how to do that by adding a

build

script to our server package.json file that builds our React app for production:


// server/package.json ... "scripts": { "start": "node server/index.js", "build": "cd client && npm install && npm run build" }, ...

I would also recommend providing a field called “engines”, where you want to specific the Node version you are using to build your project. This will be used for deployment.

You can get your Node version by running

node -v

and you can put the result in “engines” (i.e. 14.15.4):


// server/package.json "engines": { "node": "your-node-version" }

After this, we’re ready to deploy using Heroku, so make sure you have an account at Heroku.com.

Once you are signed in and are looking at your dashboard, you’ll select New > Create New App and provide a unique app name.

After that, you’ll want to install the Heroku CLI on your computer so you can deploy your app whenever you make any changes using Git. We can install the CLI by running:


sudo npm i -g heroku

Once that’s installed, you will log in to Heroku through the CLI using the

heroku login

command:


heroku login Press any key to login to Heroku

Once you have logged in, just need to follow the deployment instructions for our created app in the “Deploy” tab.

The following four commands will initialize a new Git repo for our project, add our files to it, commit them, and add a Git remote for Heroku.


git init heroku git:remote -a insert-your-app-name-here git add . git commit -am "Deploy app to Heroku"

Then the very last step is to publish our app by pushing the Heroku Git remote we just added using:


git push heroku master

Congratulations! Our full-stack React and Node app is live! 🎉

When you want to make changes to your app going forward (and deploy them), you just have to use Git to add your files, commit them and then push to our Heroku remote:


git add . git commit -m "my commit message" git push heroku master

React Node.js Booking App Full Tutorial | MERN Stack Reservation App (JWT, Cookies, Context API)
React Node.js Booking App Full Tutorial | MERN Stack Reservation App (JWT, Cookies, Context API)

-{msg.guestSignature}

7. Rồi giờ dùng this.setState để set trạng thái của message thành giá trị của data nhận về.

this.setState({messages: messages});

8. Render.

render() {

9. Chúng ta tạo JSX element để render data bên trong component. Tôi dùng this.state.messages bên trong tag

return (

Guestbook Messages

{this.state.messages}

10. Cuối cùng, export component để có thể dùng trên các page khác.

export default GuestNames;

Xong!

Node.js: Node.js is an open-source and cross-platform runtime environment for executing JavaScript code outside a browser. You need to remember that NodeJS is not a framework and it’s not a programming language. Most people are confused and understand it’s a framework or a programming language. We often use Node.js for building back-end services like APIs like Web App or Mobile App.

Features of Node.js: There are other programming languages also that we can use to build back-end services so what makes Node.js different I am going to explain.

  • It’s easy to get started and can be used for prototyping and agile development
  • It provides fast and highly scalable services
  • It uses JavaScript everywhere so it’s easy for a JavaScript programmer to build back-end services using Node.js
  • The source code is cleaner and consistent.
  • Large ecosystem for open source library.
  • It has an Asynchronous or Non-blocking nature.

Code: Here is an example of how to include the HTTP module to build the server.

Filename: App.js

Tools You Will Need

  1. Make sure Node and NPM are installed on your computer. You can download both at nodejs.org (NPM is included in your Node installation)
  2. Use a code editor of your choice. I am using and would personally recommend using VSCode. You can download VSCode at code.visualstudio.com.
  3. Make sure you have Git installed on your computer. This is necessary for deploying our application with Heroku. You can get it at git-scm.com
  4. An account at heroku.com.
Node JS vs Angular JS vs React JS | React vs Node | Node vs Angular | Intellipaat
Node JS vs Angular JS vs React JS | React vs Node | Node vs Angular | Intellipaat

What is ReactJS?

React JS is an open-source, cross-platform JavaScript-based framework that assists developers in creating user interfaces for responsive web and single-page applications. It is a free and open-source JavaScript library used to create mono-user interfaces. React JS is expressive, swift, and versatile, allowing us to design reusable UI components. It is a foundation in standard, large, interactive web applications.

Its virtual DOM technique is a time-consuming and inaccurate way of developing code. Each component involved is accountable for rendering a small, reusable piece of HTML. Developers can layer components within other components to create sophisticated applications from the basics in React JS, a quick and versatile framework supported by Facebook/Instagram and other developer communities.

Keywords searched by users: node js react js

Node Js + React Js] - Phần 1 - Cài Đặt Cơ Bản
Node Js + React Js] – Phần 1 – Cài Đặt Cơ Bản
Node.Js With React For Web Development Is A Smart Choice?
Node.Js With React For Web Development Is A Smart Choice?
Full-Stack Web Development Using React And Node Js
Full-Stack Web Development Using React And Node Js
Tạo Single Page App Giống Medium Bằng Reactjs+Redux Kết Hợp Với Nodejs
Tạo Single Page App Giống Medium Bằng Reactjs+Redux Kết Hợp Với Nodejs
Integrating Node.Js With React | Board Infinity
Integrating Node.Js With React | Board Infinity
How To Connect React Js With Node Js | Node Js Tutorial For Beginners |  What Is Node Js |Simplilearn - Youtube
How To Connect React Js With Node Js | Node Js Tutorial For Beginners | What Is Node Js |Simplilearn – Youtube
All About Full-Stack Web Development Using React With Node.Js
All About Full-Stack Web Development Using React With Node.Js
How To Connect Node.Js Backend To A React.Js Frontend 2020 | Nodejs + React  Tutorial For Beginners - Youtube
How To Connect Node.Js Backend To A React.Js Frontend 2020 | Nodejs + React Tutorial For Beginners – Youtube

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