Understanding MEAN Stack, With Examples

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Understanding MEAN Stack, With Examples

Key Points

  • MEAN stack is a combination of technologies used to create dynamic applications, consisting of MongoDB, Express.js, AngularJS, and Node.js.
  • MEAN stack is ideal for building single-page applications and real-time programs due to its strong frontend framework and event-driven, non-blocking nature.
  • To use MEAN stack, you need to establish the project structure, set up the backend and frontend servers, create modules and controllers, connect to MongoDB, and serve the frontend and API routes.

Want to create your own applications? There is no better method than using the MEAN stack. From efficient storage to an integrated runtime environment, this group of tools makes it easy to develop any function you want.

But what is the MEAN stack, and how does it work? In this article, we break down the acronym, introduce its parts, and put them in motion. We even provide the basic syntax so you can get started. Keep reading for all you need to know.

What Is MEAN Stack?

When you first hear the term MEAN stack, you might wonder about a data structure. Get that idea out of your mind. In this case, the term refers to a combination of technologies used to create dynamic applications.

The MEAN stack relies on four JavaScript programs: MongoDB for the database, Express.js for server-side application logic, AngularJS for the client-side interface, and Node.js for server runtime environment. Together, they create the acronym in question.

The MEAN stack has a strong frontend framework, making it perfect for building single-page applications. And its event-driven, non-blocking nature allows developers to create real-time programs with ease. Finally, the stack’s ability to store large blocks of data makes it ideal for setting up social network platforms and content management systems.

How Do You Use It?

To create dynamic applications with the MEAN stack, it’s important to know how each technology ties together. To get started, you’ll first establish the project structure. You want to create a file for the backend server and another for the front end. With these made, you’ll need to write a module and controller to run the function. Finally, you’ll connect it all to the database and serve the API routes.

There are quite a few steps to developing an interactive application with the MEAN stack, but once you understand the process, you can use it in several ways. To get you started, check out the syntax for this sample to-do list program:

1. Set up the project structure:

mkdir mean-todo-list
cd mean-todo-list

npm init -y

npm install express body-parser mongoose angular

2. Set up the backend server (Express.js and Node.js):

const express = require('express');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');

const app = express();

// Middleware
app.use(bodyParser.urlencoded({ extended: true }));

// Routes
app.get('/', (req, res) => {
  res.send('Hello MEAN Stack!');

// Start the server
const port = 3000;
app.listen(port, () => {
  console.log(`Server started on port ${port}`);

3. Set up the frontend server (Angular):

<!DOCTYPE html>
    <title>MEAN To-Do List</title>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.7.9/angular.min.js"></script>
    <script src="app.js"></script>
  <body ng-app="TodoApp">
    <div ng-controller="TodoController">
      <h1>My To-Do List</h1>
      <form ng-submit="addTask()">
        <input type="text" ng-model="newTask" placeholder="Add a task" required>
        <button type="submit">Add</button>
        <li ng-repeat="task in tasks">{{ task }}</li>

4. Create the frontend module and controller:

angular.module('TodoApp', [])
  .controller('TodoController', function($scope) {
    $scope.tasks = [];

    $scope.addTask = function() {
      $scope.newTask = '';

5. Connect to MongoDB:

mongoose.connect('mongodb://localhost/mean-todo-list', {
  useNewUrlParser: true,
  useUnifiedTopology: true

const db = mongoose.connection;
db.on('error', console.error.bind(console, 'MongoDB connection error:'));
db.once('open', () => {
  console.log('Connected to MongoDB');

6. Serve the frontend and API routes:

// Serve the frontend

// API routes
app.get('/api/tasks', (req, res) => {
  // Logic to fetch tasks from MongoDB and send as JSON response

app.post('/api/tasks', (req, res) => {
  // Logic to add a task to MongoDB

Frequently Asked Questions

What is MEAN stack?

The MEAN stack is a full-stack JavaScript framework that combines MongoDB, Express.js, AngularJS (now simply known as Angular), and Node.js to enable end-to-end web application development using a consistent set of technologies.

What are the applications for MEAN stack?

The MEAN stack is commonly used for developing a wide range of applications, such as single-page applications, real-time applications, social networking platforms, content management systems, e-commerce platforms, data analytics dashboards, and API development.

What is JavaScript?

JavaScript is a high-level, interpreted programming language primarily used for adding interactivity to web pages and creating dynamic web applications.

What is MongoDB?

MongoDB is a NoSQL database that uses a flexible document-based model to store and retrieve data, providing scalability, high performance, and ease of development.

What is Express.js?

Express.js is a minimal and flexible web application framework for Node.js that simplifies the development of web applications and APIs by providing a set of robust features and utilities.

What is Angular?

Angular is a popular front-end framework for building dynamic and robust web applications using TypeScript, providing powerful features for data binding, dependency injection, and component-based architecture.

What is Node.js?

Node.js is a runtime environment that allows developers to run JavaScript on the server-side, enabling the creation of scalable and efficient network applications.

What is an API route?

An API route is a specific endpoint or URL in a web application’s API that is designed to handle and respond to incoming requests from clients.

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