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Chapter 2: Understanding Node.js   ...................................................................................17
Chapter 3: Core Node.js   ...................................................................................................41
Chapter 4: Node.js Packages   ...........................................................................................65
Chapter 6: Getting Started with HTTP   ............................................................................115
Chapter 7: Introducing Express   .....................................................................................141
Chapter 8: Persisting Data   .............................................................................................165
Chapter 9: Front-End Basics   ..........................................................................................181
Chapter 10: Simplifying Callbacks   ................................................................................197
Index .................................................................................................................................275
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Introduction
Undoubtedly, personal computing has revolutionized the way we live and work today. T e Web has further revolutionized the way we use applications. When it was first introduced, the Internet was designed to present information in the form of documents. Later, JavaScript was added, which has been the key ingredient for the innovation we see on the Web today. Web applications are platform-independent, seamlessly updating, safe by default, and available anytime and everywhere. No wonder it i s di cult to get started in a developer role today without some knowledge of how the Web works.
Because of the importance of the Web and the pivotal role that JavaScript plays in web development, you can find a solution for most technical problems in some open source JavaScript project. Node.js allows you to use all these innovative JavaScript projects on the server the same as on the client browser. Using JavaScript on the server also reduces the context switching that needs to happen in your brain as you change programming language and associated code conventions. T is is the emotional side of why you should use Node.js.
 
Setting Up for Node.js Development
In this chapter, we discuss how to set up a Node.js development environment as we guide you through the installation process of Node.js on various platforms. Then we give you a tour of the Node.js REPL (read-evaluate-print-loop) and show you how you can run Node.js applications. Finally, we provide examples of Integrated Development Environments (IDEs) that can help you deliver applications faster and make your journey more enjoyable.
Installing Node.js You no longer need to build Node.js from source in order to develop Node.js applications. Node.js now provides installers for Windows as well as Mac OS X, and it can be installed in the same way as any other appl ication on these platforms (Figure 1-1). You can download Node.js installers from http: / / nodej s. org/downl oad/ .
Figure 1-1.  Node.js download page listing installers