MEAN stack requirements.

Written By Prashant Thorat ()

Updated at July 3rd, 2020


MEAN stack is an open-source JavaScript software stack. MEAN is an acronym for the JavaScript-based technologies used in MEAN stack development. M is for MongoDB, E is for Express JS, A is for AngularJS, and N is for Node.js. These four powerhouse technologies come together to create a full-stack javascript framework used to simply and quickly develop web applications.

Installation :

  1. Windows :

  2. Ubuntu:

  1. macOS :

Project Architecture and file structure :

There are various file structures are defined by the developers and that is depend upon the scalability of the project or application, some of the file structure link are given below:

Best practices for developers :

Node.js has played a significant role in the widespread adoption and popularity of JavaScript. The popularity of Node.js, based on Google’s V8 JavaScript engine can be attributed to the speed and efficiency it provides the development environment. The platform makes it easy enough to get started on but once you move beyond the core functionalities of your app, knowing how to deal with errors and how to best structure your code can get difficult. How you fix these issues, whether it’s a patchwork or based on the right practices makes all the difference between a launch disaster and a rock solid production application. Having said this let's take a look at a few Node.js tips will help you get the most out of your applications.

Some of the links which gives idea about best practices :

Logging :

Logging is an important part of supporting the complete application life cycle. From creation to debugging to planning new features, logs support us all the way. By analyzing the data in the logs, we can glean insights, resolve bugs much quicker, and detect problems early as they happen.

Security :

MEAN stack applications (MongoDB, Express.js, AngularJS, and Node.js) are becoming increasingly popular as lightweight, easily deployable frameworks due to a vast ecosystem of middleware plugins and dependencies. But just how secure are these technologies?Let’s examine some common vulnerabilities that are introduced either by using these components in their default configurations or due to common developer mistakes. Throughout this series, we will demonstrate each of these issues using an intentionally vulnerable MEAN Bug application, as well as provide mitigating techniques that developers can use to protect their applications from these issues. These articles focus on the security-related issues and assume that the reader has a basic understanding of the MEAN stack technologies.

Authentication and Authorization :

Authentication :  Authentication is the process of recognizing a user’s identity. It is the mechanism of associating an incoming request with a set of identifying credentials. The credentials provided are compared to those on a file in a database of the authorized user’s information on a local operating system or within an authentication server.

Authorization : Authorization is a security mechanism to determine access levels or user/client privileges related to system resources including files, services, computer programs, data and application features. This is the process of granting or denying access to a network resource which allows the user access to various resources based on the user's identity.

Let's clear the concept with user example follow the given link:

Scaling :

The world of web technologies is always changing and moving fast. Powerful, new open source frameworks come out every day, existing ones constantly evolve and mature with time. If you’re looking for a technology stack for building scalable applications that’s rapidly improving, easy to collaborate, and easy to learn, I’d recommend the MEAN stack

Testing :

With any application, testing is an integral part of the development process.Building tests with your application enables you to:

  • Quickly verify that changes to a project do not break expected behavior

  • Act as pseudo documentation as path flows are documented

  • Easily demonstrate application behaviors

  • Quickly take a review of your application’s health and codebase

There are many testing strategies are defined , some of those are given below:

  1. Unit Testing :

Unit testing is a software testing method where individual pieces of code (usually the smallest piece of code that can be logically isolated in a system) are tested in isolation. Unit tests should be isolated such that there are no external dependencies.

  1. Load Testing : 

Load testing is a type of non-functional testing. A load test is a type of software testing which is conducted to understand the behavior of the application under a specific expected load. Load testing is performed to determine a system's behavior under both normal and at peak conditions.

  1. Regression Testing :

Regression Testing to Detect Breaking Changes in Node. js Libraries. The npm repository contains JavaScript libraries that are used by millions of software developers. Its semantic versioning system relies on the ability to distinguish between breaking and non-breaking changes when libraries are updated.

Load Balancing :

The load balancer performs health checks on all registered instances, whether the instance is in a healthy or unhealthy state. The load balancer routes request only to the healthy instances. When the load balancer determines that an instance is unhealthy, it stops routing requests to that instance.

Deployment :

There are many platforms on which applications can be deployed. For getting more idea about deployment follow the below links:

Code Template and Reference Implementation Library :

There are many code templates and libraries which can be use to develop application, there are many libraries provided by NPM (Node package manager) which are open source .

Learning Path To Developers :

Though you can learn MEAN stack by learning the different technologies used in the stack.But having knowledge of some technologies would definitely help.Let's look at the components of the MEAN stack:

  • MongoDB : Document database data stored as JSON (JavaScript Object Notation) documents

  • Express.js web application framework which runs on Node.js

  • Angular (formerly Angular.js): Front-end web app framework runs your JavaScript code in the user’s browser

  • Node.js : JavaScript runtime environment

As you can see all the layers in MEAN stack use JavaScript,this implies that having prior knowledge of JavaScript will help you in learning MEAN stack.

If you are a beginner in JavaScript I would recommend you to learn JavaScript Tutorial and then Object Oriented JavaScript from Official doc and ES6 Concepts from ES6 link. One should be strong with JavaScript frameworks before entering into the MEAN framework.

Then you can start learning Angular, NodeJs, ExpressJs from its official documentation or youtube tutorials.

CI/CD strategy/practices using containers :

Continuous integration, delivery, and deployment, known collectively as CI/CD, is an integral part of modern development intended to reduce errors during integration and deployment while increasing project velocity.

In software engineering, CI/CD or CICD generally refers to the combined practices of continuous integration and either continuous delivery or continuous deployment. In the context of corporate communication, CI/CD can also refer to the overall process of corporate identity and corporate design.

A CI/CD tool such as Jenkins, CircleCI, AWS CodeBuild, Azure DevOps, Atlassian Bamboo, or Travis CI is used to automate the steps and provide reporting. A typical CD pipeline has build, test, and deploy stages.

A good CI/CD strategy means engineers can work on important projects and not worry about time-consuming manual tasks. They can also work confidently knowing that errors are caught automatically, not right before deployment. This kind of cooperative engineering culture inevitably attracts talent.

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