MERN Stack Web Development

What is MERN Stack ?

Mern Stack refers to a collection of JavaScript technologies used to develop web applications. Therefore, from the client to the server and from server to database, everything is based on JavaScript. MERN is a full-stack development toolkit used to develop a fast and robust web applications.

MERN is a user-friendly stack which is the ideal solution for building dynamic websites and applications. This free and open-source stack offers a quick and organized method for creating rapid prototypes for web-based applications.

 MERN stands for MongoDB, ExpressJS, React, and Node. MERN is a Web development stack for building full stack Web applications. This means that you can build a complete Web application, including the frontend, backend, and the business logic with a database using the MERN stack.

MERN comprises of four technologies, MongoDB, ExpressJS, React, and Node. The following diagram explains the role of each technology in the MERN stack.

React
 React, formerly known as Reactjs or React.js was originally developed by Facebook in 2011. Today, React is the most popular open-source JavaScript framework used to build Web user interfaces. React also allows us to create reusable UI components.

React allows developers to create large web applications that can change data without reloading the page. The main purpose of React is to be fast, scalable, and simple. It works only on user interfaces in the application. This corresponds to the view in the MVC template. It can be used with a combination of other JavaScript libraries or frameworks, such as Angular JS in MVC. 

 
ExpressJS
 ExpressJS is the middleware and sits between React and Node as a part of the MERN stack. ExpressJS is a NodeJS framework for creating server-side applications. ExpressJS provides many shorthand methods for writing the functionality provided by NodeJS.

 
Node
 Node or Node.js is an open-source, cross-platform JavaScript based server-side runtime framework. Unlike JavaScript, Node runs on a server. Node has recently become one of the more popular frameworks used to build Web applications based on JavaScript.

 
MongoDB
 MongoDB is a document-based, open-source database. It is also a leading NoSQL database. It provides high performance, high availability, auto-sharding and automatic scaling. MongoDB database is written mainly in C++ . It’s drivers and client libraries are typically written in their respective languages, although some drivers use C extensions for better performance. MongoDB differs from relational databases because it is a schema-less database. These types of databases usually have lower transaction safety, but are faster than relational databases when it comes to accessing data and scale.

MongoDB stores data as documents. Therefore, it is a document-based database. A document is a data structure that stores the data in field and value pairs. The format of MongoDB documents is similar to JavaScript Object Notation (JSON). The values of a field may include a simple value, array and other documents. MongoDB uses BSON format to store the data into a document.

 
Why MERN Stack Developer?

MERN Stack is one of the most popular user-friendly Full Stack Web Development structures. It helps us improve our applications to a great extent. You don’t need to learn multiple programming languages for web application development because MERN stack covers both front-end as well as back-end. It will give you the advantage of using a single language i.e. JavaScript, for web development which makes it very effective and powerful.

There is a huge demand of MERN stack developers in the industry because these professional are a valuable asset to any company. Be it a small, medium or large company, all are hunting for the MERN stack prfessionals.