Rachel Cole

Rachel Cole

1564563883

How to build a real time chat application in Node.js using Express, Mongoose and Socket.io

In this tutorial, we will use the Node.js platform to build a real time chat application that sends and shows messages to a recipient instantly without any page refresh. We will use the JavaScript framework Express.js and the libraries Mongoose and Socket.io to achieve this.

Before we start, lets have a quick look at the basics of Node.js

Node.js

Node.js is an open-source, cross-platform JavaScript run-time environment that executes JavaScript code outside the browser. The most important advantage of using Node is that we can use JavaScript as both a front-end and back-end language.

As we know, JavaScript was used primarily for client-side scripting, in which scripts were embedded in a webpage’s HTML and run client-side by a JavaScript engine in the user’s web browser.

Node.js lets developers use JavaScript to write Command Line tools and for server-side scripting — running scripts server-side to produce dynamic web page content before the page is sent to the user’s web browser.

To install node:

https://nodejs.org/en/download/

Even though the node is single threaded it’s still faster to use asynchronous functions. For example, Node can process other things while a file is being read off disk, or while waiting for an HTTP request to complete. The asynchronous behaviour can be implemented using callbacks. Also the JavaScript works well with JSON and No-SQL databases.

NPM** Modules**

Nodejs allows the modules of libraries to be included in the application. These modules can be user-defined or third party modules.

The third party modules can be installed using the following command:

npm install module_name

and the installed modules can be used using the require() function:

var module = require(‘module_name’)

In Node apps we will be using a package.json file to maintain the module versions. This file can be created by this command:

npm init

and the packages must be installed as follows:

npm install -s module_name

There are many frameworks that can be added as modules to our Node application. These will be explained further on as needed.

Simple Chat Application

The app must allow multiple users to chat together. The messages must be updated without refreshing the page. For simplicity we will be avoiding the authentication part.

We can start by creating a new project directory and moving into it. Then we can initiate our project by the following command:

npm init

This will prompt us to enter details about our project.

After this a package.json file will be created:

{

 “name”: “test”,

 “version”: “1.0.0”,

 “description”: “”,

 “main”: “index.js”,

 “scripts”: {

 “test”: “echo \”Error: no test specified\” && exit 1"

 },

 “author”: “”,

 “license”: “ISC”

}

Our app directory is now set.

The first thing we need to create is a server. In order to create that, we will be making use of a framework named Express.

Express.js

Express.js, or simply Express, is a web application framework for Node.js. Express provides a robust set of features for web and mobile applications. Express provides a thin layer of fundamental web application features, without obscuring Node.js features.

We will install Express.js using the following command:

npm install -s express

Inside the package.json file a new line will be added:

dependencies”: {

 “express”: “⁴.16.3”

 }

Next we will create a server.js file.

In this file we need to require Express and create a reference to a variable from an instance of Express. Static contents like HTML, CSS or JavaScript can be served using express.js:

var express = require(‘express’); 
var app = express();

and we can start listening to a port using the code:

var server = app.listen(3000, () => {

 console.log(‘server is running on port’, server.address().port);

});

Now we need to create an HTML file index.html that displays our UI. I have added bootstrap and JQuery cdn.

//index.html

 

<!DOCTYPE html>

<html>

<head>

 <! — include bootstap and jquery cdn →

</head>

<body>

<div class=”container”>

 <br>

 <div class=”jumbotron”>

 <h1 class=”display-4">Send Message</h1>

 <br>

 <input id = “name” class=”form-control” placeholder=”Name”>

 <br>

 <textarea id = “message” class=”form-control” placeholder=”Your Message Here”>

</textarea>

 <br>

 <button id=”send” class=”btn btn-success”>Send</button>

 </div>

 <div id=”messages”>

 

</div>

</div>

<script>

 

</script>

</body>

</html>


Please note that the empty

#node-js #express #mongodb

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Buddha Community

How to build a real time chat application in Node.js using Express, Mongoose and Socket.io

I am Developer

1618120954

Real Time Chat App using Node JS Express Socket IO

Real time chat with nodejs socket.io and expressjs. In this tutorial, you will learn how to build real time chat with nodejs socket.io, jquery and expressjs.

This tutorial will help you step by step to on how to build chat application using Nodejs, Express and Socket.IO.

How to build chat application using Nodejs, Express and Socket.IO

Follow the following steps and create chat application using Nodejs, Express and Socket.IO:

  • Step 1 - Create Chat App Directory
  • Step 2 - Install Node Express JS, Socket.io and jQuery
  • Step 3 - Create Index.html and Style.css
  • Step 4 - Create Chat.js
  • Step 5 - Create index.js
  • Step 6 - Run Development Server

https://www.tutsmake.com/node-js-express-socket-io-chat-application-example/

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Jessica Smith

Jessica Smith

1612606870

REAL TIME CHAT SOLUTIONS SERVICES FOR MOBILE APPS

Build a Real Time chat application that can integrated into your social handles. Add more life to your website or support portal with a real time chat solutions for mobile apps that shows online presence indicators, typing status, timestamp, multimedia sharing and much more. Users can also log into the live chat app using their social media logins sparing them from the need to remember usernames and passwords. For more information call us at +18444455767 or email us at hello@sisgain.com or Visit: https://sisgain.com/instant-real-time-chat-solutions-mobile-apps

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Nandu Singh

Nandu Singh

1590640889

Build a Real Time Chat App with Socket.io and Node.js

In this video you will be creating a real time chat application complete with usernames and connect/disconnect messages. You will use Socket.io to manage real time web socket connections to a Node.js server that will allow you to communicate real time chat messages to all clients connected to a single server.

This entire project will take less than 100 lines of JavaScript and almost no HTML/CSS, but it is incredibly powerful what can be done with such little code. By the end of this video you will have a strong understanding of how to send and receive messages using web sockets and Socket.io to make any real time application.

📚 Materials/References:

GitHub Code: https://github.com/WebDevSimplified/Realtime-Simple-Chat-App
Socket.io: https://socket.io

#socket-io #node #node.js #chat

Node JS Development Company| Node JS Web Developers-SISGAIN

Top organizations and start-ups hire Node.js developers from SISGAIN for their strategic software development projects in Illinois, USA. On the off chance that you are searching for a first rate innovation to assemble a constant Node.js web application development or a module, Node.js applications are the most appropriate alternative to pick. As Leading Node.js development company, we leverage our profound information on its segments and convey solutions that bring noteworthy business results. For more information email us at hello@sisgain.com

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Aria Barnes

Aria Barnes

1622719015

Why use Node.js for Web Development? Benefits and Examples of Apps

Front-end web development has been overwhelmed by JavaScript highlights for quite a long time. Google, Facebook, Wikipedia, and most of all online pages use JS for customer side activities. As of late, it additionally made a shift to cross-platform mobile development as a main technology in React Native, Nativescript, Apache Cordova, and other crossover devices. 

Throughout the most recent couple of years, Node.js moved to backend development as well. Designers need to utilize a similar tech stack for the whole web project without learning another language for server-side development. Node.js is a device that adjusts JS usefulness and syntax to the backend. 

What is Node.js? 

Node.js isn’t a language, or library, or system. It’s a runtime situation: commonly JavaScript needs a program to work, however Node.js makes appropriate settings for JS to run outside of the program. It’s based on a JavaScript V8 motor that can run in Chrome, different programs, or independently. 

The extent of V8 is to change JS program situated code into machine code — so JS turns into a broadly useful language and can be perceived by servers. This is one of the advantages of utilizing Node.js in web application development: it expands the usefulness of JavaScript, permitting designers to coordinate the language with APIs, different languages, and outside libraries.

What Are the Advantages of Node.js Web Application Development? 

Of late, organizations have been effectively changing from their backend tech stacks to Node.js. LinkedIn picked Node.js over Ruby on Rails since it took care of expanding responsibility better and decreased the quantity of servers by multiple times. PayPal and Netflix did something comparative, just they had a goal to change their design to microservices. We should investigate the motivations to pick Node.JS for web application development and when we are planning to hire node js developers. 

Amazing Tech Stack for Web Development 

The principal thing that makes Node.js a go-to environment for web development is its JavaScript legacy. It’s the most well known language right now with a great many free devices and a functioning local area. Node.js, because of its association with JS, immediately rose in ubiquity — presently it has in excess of 368 million downloads and a great many free tools in the bundle module. 

Alongside prevalence, Node.js additionally acquired the fundamental JS benefits: 

  • quick execution and information preparing; 
  • exceptionally reusable code; 
  • the code is not difficult to learn, compose, read, and keep up; 
  • tremendous asset library, a huge number of free aides, and a functioning local area. 

In addition, it’s a piece of a well known MEAN tech stack (the blend of MongoDB, Express.js, Angular, and Node.js — four tools that handle all vital parts of web application development). 

Designers Can Utilize JavaScript for the Whole Undertaking 

This is perhaps the most clear advantage of Node.js web application development. JavaScript is an unquestionable requirement for web development. Regardless of whether you construct a multi-page or single-page application, you need to know JS well. On the off chance that you are now OK with JavaScript, learning Node.js won’t be an issue. Grammar, fundamental usefulness, primary standards — every one of these things are comparable. 

In the event that you have JS designers in your group, it will be simpler for them to learn JS-based Node than a totally new dialect. What’s more, the front-end and back-end codebase will be basically the same, simple to peruse, and keep up — in light of the fact that they are both JS-based. 

A Quick Environment for Microservice Development 

There’s another motivation behind why Node.js got famous so rapidly. The environment suits well the idea of microservice development (spilling stone monument usefulness into handfuls or many more modest administrations). 

Microservices need to speak with one another rapidly — and Node.js is probably the quickest device in information handling. Among the fundamental Node.js benefits for programming development are its non-obstructing algorithms.

Node.js measures a few demands all at once without trusting that the first will be concluded. Many microservices can send messages to one another, and they will be gotten and addressed all the while. 

Versatile Web Application Development 

Node.js was worked in view of adaptability — its name really says it. The environment permits numerous hubs to run all the while and speak with one another. Here’s the reason Node.js adaptability is better than other web backend development arrangements. 

Node.js has a module that is liable for load adjusting for each running CPU center. This is one of numerous Node.js module benefits: you can run various hubs all at once, and the environment will naturally adjust the responsibility. 

Node.js permits even apportioning: you can part your application into various situations. You show various forms of the application to different clients, in light of their age, interests, area, language, and so on. This builds personalization and diminishes responsibility. Hub accomplishes this with kid measures — tasks that rapidly speak with one another and share a similar root. 

What’s more, Node’s non-hindering solicitation handling framework adds to fast, letting applications measure a great many solicitations. 

Control Stream Highlights

Numerous designers consider nonconcurrent to be one of the two impediments and benefits of Node.js web application development. In Node, at whatever point the capacity is executed, the code consequently sends a callback. As the quantity of capacities develops, so does the number of callbacks — and you end up in a circumstance known as the callback damnation. 

In any case, Node.js offers an exit plan. You can utilize systems that will plan capacities and sort through callbacks. Systems will associate comparable capacities consequently — so you can track down an essential component via search or in an envelope. At that point, there’s no compelling reason to look through callbacks.

 

Final Words

So, these are some of the top benefits of Nodejs in web application development. This is how Nodejs is contributing a lot to the field of web application development. 

I hope now you are totally aware of the whole process of how Nodejs is really important for your web project. If you are looking to hire a node js development company in India then I would suggest that you take a little consultancy too whenever you call. 

Good Luck!

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