Stack of technology provides MERN stack. It is a set of technologies used to develop an application, including programming languages, frameworks, databases, front-end and back-end tools, and APIs. In the MERN Stack, the working components are MongoDB, ExpressJS, ReactJS, and NodeJS. 

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Here are the details of the roles each component fulfills when developing a web application with the MERN stack : 

MongoDB:

MongoDB is a NoSQL database that stores data as a document, comprising key-value pairs similar to JSON (JavaScript Object Notation) objects. MongoDB is flexible, letting users make schemas, databases, tables, and more. In MongoDB, special credentials identified by a primary key form its basic unit. After installing MongoDB, users can utilize the Mongo shell, which provides a JavaScript interface for interacting with the database, such as querying, updating, and deleting records.

Express.JS

Express is a framework used for making the back-end of web applications with Node.js. It makes coding easier compared to using Node.js alone by providing shortcuts and tools. With this framework, developers can create better web applications and APIs. It also offers many add-ons, called middleware, to make coding quicker and simpler. Instead of writing all the server code from scratch with Node.js, developers use Express to speed up the process. It is known for being fast and organized, and it offers lots of extra features through plugins.

ReactJS

React is a JavaScript library that is used for building user interfaces. React is used for the development of single-page web applications, complex software applications, and mobile applications. React can switch rapidly changing data. React allows the client to code in JavaScript and create UI components. React is an open-source JavaScript library that can be used for creating views rendered in HTML. Unlike AngularJS, React is not a framework but a library.

Node.js

Node.js, in the beginning developed for Google Chrome and made open-source by Google in 2008, is a JavaScript runtime environment. It is designed for building scalable network applications and can run JavaScript code outside of a web browser. With Node.js, users can execute their code on servers without a browser. It comes with a node package manager, offering thousands of free packages (node modules) for download. Node.js works without an enclosing HTML page. Here, uses its module system, based on CommonJS, to combine multiple JavaScript files seamlessly.

Advantages of a MERN Stack Developer  

One of the main advantages of the MERN stack is that developers use only JavaScript throughout the entire development process. JavaScript is a versatile programming language used for both client-side and server-side tasks. In contrast, when working with another full-stack setup that involves multiple programming languages, developers often face challenges in integrating them seamlessly. However, stack developers only need to be proficient in JavaScript and JSON.

The MERN Stack ecosystem is always a growing platform that receives regular updates with new tools and technologies, which are focused at improving the development processes. So, the demand never goes down. If you are interested in learning more about MERN Stack, be sure to check out the best MERN Stack training in India. Currently, the Srishti campus is the best training center in Kerala. There are a lot of online MERN Stack training centers available in Kerala.