Full Stack JavaScript Development with MEAN Notes

Full Stack JavaScript Development with MEAN - Notes

Preface

• Modern tools allow for creating production-grade applications using only JavaScript, HTML, and CSS.
• The MEAN stack (MongoDB, Express, AngularJS, Node.js) has gained popularity, being explored in detail in the book.
• The book covers:
  • Node.js and installing modules
  • MongoDB and CRUD operations
  • Express framework
  • AngularJS fundamentals such as data binding, directives, controllers, etc.
  • Debugging and testing MEAN applications.
  • Introduction to task runners Gulp and Grunt.

Chapter 1: Introduction

• Effective web programming requires understanding many topics, including:
  • Networking, security, databases, and both client-side and server-side development.
• A need for a unified language across the full stack led to the use of JavaScript everywhere, facilitated by frameworks like Node.js.

Chapter 2: Node.js Introduction

• Node.js introduced by Ryan Dahl in 2009 allows for server-side JavaScript execution.
• Built on Google’s V8 JavaScript engine, it supports non-blocking, asynchronous I/O operations, which prevents performance bottlenecks.
• The ecosystem has grown, with over 77,000 third-party modules available via npm.

Example Web Server in Node:

var http = require('http');
http.createServer(function(req, res) {
     res.writeHead(200, {'Content-Type': 'text/plain'});
     res.end('Hello World\n');
}).listen(1337, '127.0.0.1');
console.log('Server running at http://127.0.0.1:1337/');

Chapter 3: Modules and npm

• npm (Node package manager) is integral for managing Node.js modules.

Key npm Commands:

• npm install - installs dependencies listed in package.json.
• npm install <module_name> - installs a specific module.

package.json Structure:

{
  "name": "app_name",
  "version": "0.0.1",
  "dependencies": {
    "express": "*"
  }
}

Chapter 4: Node’s Programming Model

• JavaScript is single-threaded, managed through the event loop which processes asynchronous I/O.
• Common practices include:
  • Using callback functions for I/O operations.
  • Event emitters and promises for handling asynchronous tasks.

Chapter 5: Core Modules

• The fs (File System) module provides methods to interact with the file system.

Basic Commands:

var fs = require('fs');
fs.readFile('file.txt', 'utf8', function(err, data) {
    if (err) throw err;
    console.log(data);
});

Chapter 6: Building the Node Server

• Building a server structure including routing and static resource serving.
• Focus on creating a RESTful interface for CRUD operations:
  1. Retrieve a list of employees.
  2. Get an individual employee's data.
  3. Serve static files like HTML, CSS.

Chapter 7: MongoDB Introduction

• MongoDB is a NoSQL database designed for ease of use and flexibility, storing data in BSON (Binary JSON) format.
• Basic operations include insert, update, find, and delete records.

Chapter 8: Interacting with MongoDB Using Mongoose

• Mongoose provides a schema-based solution for modeling application data in MongoDB.

Creating a Mongoose Schema Example:

var EmployeeSchema = new mongoose.Schema({
  name: { first: String, last: String },
  team: mongoose.Schema.Types.ObjectId
});

Chapter 9: Using MongoDB and Mongoose in Our Sample App

• Integrating MongoDB with our previously built Node.js app to dynamically fetch employee data.
• Refactoring to use Mongoose for data interactions instead of hard-coded JSON.

Chapter 10: Alternatives to Mongo

• An exploration of SQL databases (e.g. MySQL) providing a structure for data persistence compared to NoSQL options like MongoDB.

Chapter 11: Introduction to Express

• Express.js is a minimal and flexible Node.js web application framework offering robust features for web and mobile applications.
• Provides middleware integration, routing, and handling of HTTP requests and responses.

Chapter 12: Architecture of an Express Application

• Discusses the structure of an Express application, including middleware, routing, and error handling mechanics.

Chapter 13: Using Express in Our App

• Complete integration of Angular into an Express application alongside MongoDB.

Chapter 14: Alternative Server Frameworks

• Introduction to Hapi.js as another alternative to Express, with features around configuration and routing.

Chapter 15: AngularJS Overview

• Angular is designed for building single-page applications (SPAs), enhancing user experience via two-way data binding and client-side routing.

Chapter 16: Data Binding

• Data binding is the automatic synchronization of data between the model and view.

Chapter 17: Angular Directives

• Directives in Angular extend HTML attributes, enabling enhanced HTML functionality and new custom directives.

Chapter 18: Controllers

• Controllers in Angular manage data and logic for views, facilitating interaction between the model and the view.

Chapter 19: Client-side Routing

• Overview of setting up client-side routing in Angular using the ngRoute module for smoother transitions between different views.

Chapter 20: Angular in Our App

• Implementation of responsive views and functional controllers for a complete MEAN stack application.

Chapter 21: Task Runners

• Introduction to Gulp as a task runner for managing client-side assets efficiently.

Chapter 22: Debugging

• Tools and techniques for debugging JavaScript including Chrome DevTools and node-inspector.

Chapter 23: Testing

• The importance of writing tests for applications using Mocha and Chai for testing Node.js and Angular applications effectively.