You are previewing Smashing Node.js: JavaScript Everywhere, 2nd Edition.

Smashing Node.js: JavaScript Everywhere, 2nd Edition

Cover of Smashing Node.js: JavaScript Everywhere, 2nd Edition by Guillermo Rauch Published by John Wiley & Sons
  1. Cover
  2. Table of Contents
  3. Title Page
  4. Foreword
  5. Part I: Getting Started: Setup and Concepts
    1. Chapter 1: The Setup
      1. Installing on Windows
      2. Installing on OS X
      3. Installing on Linux
      4. The Node REPL
      5. Executing a file
      6. NPM
      7. Summary
    2. Chapter 2: Javascript: An Overview
      1. Introduction
      2. Basic JavaScript
      3. v8 JavaScript
      4. Summary
    3. Chapter 3: Blocking and Non-blocking IO
      1. With great power comes great responsibility
      2. Summary
    4. Chapter 4: Node JavaScript
      1. The global object
      2. The module system
      3. Exposing APIs
      4. Events
      5. Buffers
      6. Summary
  6. Part II: Essential Node APIs
    1. Chapter 5: CLI and FS APIs: Your First Application
      1. Requirements
      2. Writing your first program
      3. Exploring the CLI
      4. Exploring the fs module
      5. Summary
    2. Chapter 6: TCP
      1. What are the characteristics of TCP?
      2. Telnet
      3. A TCP chat program
      4. An IRC Client program
      5. Summary
    3. Chapter 7: HTTP
      1. The structure of HTTP
      2. Headers
      3. Connections
      4. A simple web server
      5. A twitter web client
      6. A superagent to the rescue
      7. Reloading HTTP servers with up
      8. Summary
  7. Part III: Web Development
    1. Chapter 8: Connect
      1. A simple website with HTTP
      2. A simple website with Connect
      3. Middleware
      4. Summary
    2. Chapter 9: Express
      1. A simple express app
      2. Settings
      3. Template engines
      4. Error handling
      5. Convenience methods
      6. Routes
      7. Middleware
      8. Organization strategies
      9. Summary
    3. Chapter 10: WebSocket
      1. AJAX
      2. HTML5 WebSocket
      3. An Echo Example
      4. Mouse cursors
      5. The Challenges Ahead
      6. Summary
    4. Chapter 11: Socket.IO
      1. Transports
      2. A chat program
      3. A DJ-by-turns application
      4. Summary
  8. Part IV: Databases
    1. Chapter 12: MongoDB
      1. Installation
      2. Accessing MongoDB: A user authentication example
      3. Introducing Mongoose
      4. A mongoose example
      5. Summary
    2. Chapter 13: MySQL
      1. node-mysql
      2. sequelize
      3. Summary
    3. Chapter 14: Redis
      1. Installing Redis
      2. The Redis Query Language
      3. Data types
      4. Redis and Node
      5. Summary
  9. Part V: Testing
    1. Chapter 15: Code Sharing
      1. What can be shared?
      2. Writing compatible JavaScript
      3. Putting it all together: browserbuild
      4. Summary
    2. Chapter 16: Testing
      1. Simple testing
      2. Expect.JS
      3. Mocha
      4. Summary

Chapter 4: Node JavaScript

Writing JavaScript for Node.JS and the browser is a remarkably different experience. Node.JS takes the basic language, and just like browsers did, adds different APIs on top of it to ensure writing code that’s meant to power networked applications feels as natural as possible.

Throughout this chapter you will examine certain APIs that are not part of the language as it was conceived in its specification, but that both Node and browsers have. But more importantly, you will also go through the core Node.JS additions that are considered, as the title of this chapter implies, “Node JavaScript.”

The first difference you’ll look at pertains to the global object.

The global object

In the browser, window is the global object. Anything that you define in window becomes available to all parts of your code. For example, setTimeout is in reality window.setTimeout, and document is window.document.

Node has two similar objects that provide a cleaner separation:

global: Just like window, any property attached to global becomes a variable you can access anywhere.

process: Everything that pertains to the global context of execution is in the process object. In the browser, there’s only one window, and in Node, there’s only one process at any given time. As an example, in the browser, the window name is, and in Node, the name of the process is process.title.

Later chapters dig deeper into the process object because it provides broad and interesting functionality, ...

The best content for your career. Discover unlimited learning on demand for around $1/day.