MERN is an abbreviation which stands for MongoDB, ExpressJS, ReactJS, Node.js. This framework also provides quick and easy development of web and mobile applications using java as its main component. Main components of MERN are as follows :
MongoDB: A NoSQL, document-oriented database.
Express.js: A server-side framework for building web applications.
React js: A front-end JavaScript framework for building web applications.
Node.js: A server-side JavaScript runtime environment for executing JavaScript code on the server.

The MERN stack allows developers to use JavaScript for both client-side and server-side development, providing a unified development environment. React, the front-end library in the MERN stack, is known for its flexibility and ability to handle large and complex applications, making it a popular choice among developers. The MERN stack is widely used for building modern, dynamic web applications, and has a growing community of developers who contribute to its continued development and improvement.

Working of MERN stack:

The MERN stack architecture is used to build web applications in JavaScript, and handling JSON, incredibly easy.

React.js front end:

React.js is at the top of the development stack. It is declarative JavaScript framework for creating dynamic client-side applications. React.js let us build up complex interfaces through simple components, connect them to data on our backend server.

Express.js and Node.js server tier:

Express.js is the next step of MEAN stack, running on a Node.js server. Express.js is a fast, minimalist web framework for Node.js. Express.js has powerful models for URL routing and handling HTTP requests and responses.

MongoDB Database Tier:

If we need to store any data, then we need a database like MongoDB. JSON documents created in Angular.js front end are sent to the Express.js server, where they are processed and stored directly in MongoDB for later retrieval.

Advantages of MERN stack:

Full-stack JavaScript: MERN uses JavaScript for both client-side and server-side development, making the development process more efficient and streamlined.
Community support: React, one of the components of the MERN stack, has a large and active community of developers who contribute to its development and improvement.
Flexibility: React is a lightweight and flexible option compared to Angular, making it a great choice for building dynamic user interfaces.
Performance:React is known for its fast performance and ability to handle large and complex applications, making it a great choice for building high-performance web applications.

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