MEAN Stack vs MERN Stack: Which Stack to Choose?

In the recent decade, developers have reached unprecedented heights in terms of creating application stacks. There are two sides to every given online platform: the front end (or user interface) and the back end (or code that runs the site). On the other hand , stack is a collection of frameworks and tools used by web development companies for web applications development. MEAN and MERN are two of them!

MEAN stack is a set of JavaScript-based tools used for application development. MERN Stack is a popular replacement for MEAN Stack, in which classic frontend framework Angular is substituted with React.js library. 

Not sure which one to choose from the MEAN stack vs MERN stack? Well, to choose the best technology stacks for your company, you must be savvy enough to weigh the merits of MEAN stack vs MERN stack. Therefore, this article provides a detailed comparison of the two stacks to assist you in making the best decision for your company.

1. What is MEAN Stack?

The MEAN Stack is the most widely useful technology stack for building apps for both web and mobile platforms, especially by full-stack developers. It also uses multiple third-party libraries and tools for large-scale projects.

MEAN stack leads to faster application development as well as the deployment. Using MEAN stack, one can 

• Create scalable apps for cloud deployment
• Simplify deployment process with a built in web server
• Manage large amount of data

The MEAN stack consists of four significant elements: MongoDB, Express.js, Angular, and Node.js.

Technology	Key Advantages
MongoDB	One that stores data in a document format rather than a traditional database which is more like an informative set of documents. Stores information in a binary JSON format and adds on to what can be done in the cloud.
Express.js	Provides a robust set of features for building API-based web and mobile applications. Creates apps with a variety of page types.  It’s a server layer built on nodes that offers the stack’s logic.
Angular	It’s a free and open source JavaScript front-end framework for developing user interfaces. Supports the Model-View-Controller pattern, which is used to build both web apps and enterprise software. Various syntaxes are expressed using the HTML syntax.
Node.js	A server-side runtime environment for executing code, namely JavaScript. Conceives and creates software for use in networks and on servers. Develops web-based I/O frameworks for software.

2. What is MERN Stack?

A popular alternative to the MEAN Stack is the MERN Technology Stack, which swaps out the cumbersome and time-consuming Angular in favor of the more straightforward and simple React.js in any software development.

MongoDB, Express.js, React.js, and Node.js form the “MERN” acronym, which describes this combination of technologies. Let’s examine the functions of each of these parts in further detail.

Technology	Key Advantages
MongoDB	Document-oriented, highly scalable, NoSQL database that works on several platforms. MongoDB has the JavaScript interface Mongo Shell for performing operations.
Express.js	Operates as a layer atop Node.js that provides assistance to the backend framework. The modular framework helps developers save time by facilitating code reuse and supporting middleware.
React.js	A front-end Library for developing Interactive UIs. Ideal for use in single-page and mobile apps. It’s quick to process data that’s constantly changing.
Node.js	Using its frameworks, programmers can build the backend for single-page web apps. It works with Node Pack Manager (npm), which provides access to hundreds of open-source and commercial Node modules.

3. MEAN Stack vs MERN Stack

Let’s first understand the architecture of both the stacks. 

3.1 MEAN Stack Architecture

The MEAN architecture was created to drastically simplify the process of creating a JavaScript-based web application capable of working with JSON.

Angular.js as a Front-end Framework

Angular, which calls itself a “JavaScript MVW Framework”, is classically used in the MEAN stack.

Compared to manually coding a website in static HTML and JavaScript, Angular makes it much easier to construct dynamic, interactive online experiences by extending your HTML tags with information (or jQuery).

Form authentication, localization, and two-way communication with your back-end service are key features of Angular. Here is the Quora answer from Google’s UX Engineer on usefulness of Angular in the MEAN Stack.

3.2 MERN Stack Architecture

With the MERN architecture, you can quickly and simply build a full front-to-back-to-database stack just in JavaScript and JSON.

React.js as a Front-end Library

React.js, the expressive JavaScript library for developing interactive HTML client-side apps, is the crown jewel of the MERN stack. Using React, you can construct sophisticated user interfaces with elementary building blocks, bind them to server-side data, and output the result as HTML.

When it comes to domain-specific, data-driven UI, React shines. It also includes all the features you’d want from a professional web framework, such as excellent coverage for forms, error detection, events, listings, and many more.

3.3 MEAN and MERN Stack Common Architectural Components

Express.js and Node.js Server Tier

Express.js is a web framework that you can deploy on a Node.js server. It describes itself as a “rapid, unbiased, simple web framework for Node.js,” which it is.

Express has strong techniques for handling HTTP requests, responses, and URL routing, which is the activity of linking an arriving URL with a server operation. Your Angular.js app’s front end may communicate with the backend Express.js services using XML HTTP requests (XHRs), GETs, and POSTs.

Those methods then access and modify the MongoDB database utilizing the Node.js drivers through callbacks or using promises.

MongoDB Database Tier

You’ll need a database that’s as straightforward to deal with as Angular or React, Express, and Node if the app keeps personal profiles, data, remarks, transfers, events, and so on.

Here is when MongoDB enters through: JSON documents may be sent to the Express.js servers after being produced by the Angular.js or React front end also validated and (if found to be correct) saved in MongoDB.

4. Tabular Comparison: MEAN Stack vs MERN Stack

5. When to Use MEAN Stack? 

Display tier (Angular.js or Angular), application tier (Express.js and Node.js), and database tier (MongoDB) are the three components that makeup MEAN’s take on the classic three-tier JavaScript stack structure.

You should give MEAN significant consideration if you’re developing a JavaScript project, especially in Node.js and angular.

While the MongoDB Query Language (MQL) is expressed in JSON, the command line interface (CLI) is a JavaScript translator, and the data itself is stored in a JSON-like format (BSON, a binary JSON extension). MongoDB is a JavaScript/JSON data repository that also supports robust native Node.js drivers and is built for horizontal scalability, and offers sophisticated capabilities like indexing and searching deep into JSON documents. Using MongoDB Atlas, MongoDB developers develop the cloud-native database as a service, cloud-based application development has never been simpler.

MEAN is the best stack for developing Node.js apps, whether you’re making a microservice, a basic web app, or an API with maximum bandwidth.

6. When to Use MERN Stack?

Since the MERN Stack uses JavaScript, there is no requirement for the programmer to transition between different contexts. When it comes to abstracting the UI layer, React js library in the MERN Stack, excels. To facilitate the straightforward development fostered by the MVC architecture design, MERN provides a library with an easily accessible interface that allows rapid code execution. Big, reactive JSON data that can move easily between the front and back ends of an application is ideal since it can be easily managed and updated.

MERN is a general-purpose web stack, so you may use it to create anything you choose; however, it shines in scenarios that need significant use of JSON, are native to the cloud, and have interactive web interfaces.

Project management, data aggregation, to-do applications and calendars, engaging forums and social goods, and anything else you can think of are all examples.

7. Conclusion

Due to their tight relationship, MEAN and MERN stacks make it difficult to pick only one for web development. The foundations and competencies of both technologies are dependable. Yet, MEAN is more useful for large-scale apps, whereas MERN for faster development of smaller apps due to structural differences. Consequently, it is important to pick from the MEAN stack vs MERN stack based on the requirements of your application.