The way to Node JS and Express JS

Before getting to learn advanced of “The way to Node JS and Express JS”, let’s learn what are those. In simply we can say node JS is an open source server environment and uses JavaScript on the server. Node JS is free and runs on various platforms such as Windows, Linux, Unix, Mac OS. Let’s get into Node JS in-deeply.

What is Node JS ?

There are so many JavaScript frameworks on the industry today, including Angular, React, jQuery etc. Therefore, we download the JavaScript framework from the respective website and link it to the project to incorporate these libraries into our web project. Node JS is an open-source, cross-platform, back-end JavaScript runtime environment that runs on the V8 engine and executes JavaScript code outside a web browser. It’s an open source cress-platform for server side programming. It means Node uses Java Script on the server. Node JS runs on various platforms like windows, Linux, Unix, Mac OS.

What can Node JS do?

Node JS can generate dynamic page content and can create , open, read, write, delete and close files on the server. Node JS can collect form data and can add, delete, modify data in your database.

What is Node JS file?

Node JS files contain tasks that will be executed on certain events and a typical event like is someone typing to access a pot on the server. File extension is “.js”.

Node JS Modules

Consider modules to be the same as JavaScript libraries. A set of functions you want to include in your application.

This simplifies interaction between client and server in real-time and Node.js has an event-driven model which allows asynchronous input and output. Node can generate dynamic page content using create write delete files on the server. It means it can add, delete, modify data in the database.

Install Node JS Globally

Go to Node,js official page and download Node.( Click here to download ) Then install Nodejs. If you have a problem,, you can use this docs to solve it.

Once you downloaded and installed Node, let’s try a simple program.

First create a Node file called “firstProgram.js” and implement this code.

var HTTP = require(‘http’);

HTTP.createServer(function (req, res) {
res.writeHead(200, {‘Content-Type’: ‘text/html’});
res.end(‘Hello World!’);
}).listen(8080);

In this code tells, print Hello World in your browser using 8080 port.

What is NPM ?

NPM is a centralized region, linking to the different JavaScript frameworks on the market. to use the NPM packages, you need to install Node JS. We installed Node in above.

What is Express JS ?

First we go with ExpressJS documentation, ExpressJs is a fast, un-opinionated, minimalist web framework for Node.js. This is a framework that runs within Node.js. that allows developers to create and maintain servers. We can write server-side logic in java script for web and mobile applications.

Express offers a simple interface for creating our applications. It gives us the resources needed to create our app. Express has been developed by TJ Holowaychuk and is maintained by foundation Node.js and various open source contributors. It is versatile, as various modules are available on npm, which can be plugged directly into Express.

This is The way to Express JS.

With ExpressJs we don’t need to care about low level protocols, processes. ExpressJs handle all of that. We can use Express with the main stack and the nerd stack. It provides strong set of features for web and mobile application. We can say that ExpressJs is a layer build on top of the node.js which helps to manage and routes.

The way to Node JS and Express JS — What is Express JS

Express.JS is a prebuilt NodeJS framework that can help you more easily and smartly build server-side web applications. Lightness, minimalism, flexibility, usability are some of its characteristics and as it is built in NodeJS itself, its output has also been inherited.

ExpressJs has been called the de facto standard server framework for Node.js. ExpressJs is used as the back-end of the MERN stack along with the mongo DB database and front-end AngularJS.

What IS MEAN Stack,

mongoDB
ExpressJs
Angular
Nodejs

What are NERD stack,

Reactjs
NodeJS
ExpressJS
DocumentDB

The primary use of Express is to provide server side logic for web and mobile apps. Because Expressjs is a fast and lightweight framework used major for web application development.

Features

Can work with various engines.
Express. JS is an open-source community.
It is very pluggable and flexible which means that there is no “best way” to do something. It has a lot of freedom.
Fast input/output.
JS is that you’d get quick application development experience with it.
Express has the biggest group not only out of the three frameworks but out of all Node.js web application frameworks
Single threaded and asynchronous.
Follow the MVC architecture( Model-View-Controller ). Also it has Integrate engines with “view” rendering to produce responses by inserting data into templates.
Error handling middleware that means It allows the setup of middleware to address HTTP requests and Write handlers to multiple URL paths (routes) for requests with specific HTTP verbs.

ExpressJS is the back-end web application framework with best backend creation. The primary benefit of it is that it allows you to create web applications and not only because it is a kind of JavaScript library. Because that JavaScript is the best backend programming language.

Cons

The middleware framework provided with Express. JS addresses many client request problems.
Issues in the callbacks.
There’s no built-in error handling, it’s easy to get lost with all the middleware that could be applied to solve a solution