15 Introduction to Node.js
Node.js is an open-source project that lets you write JavaScript that runs outside the browser.
When you write JavaScript for the
browser, your code is given access to global objects like the
document and window, as well
as other APIs and libraries.
With Node, your code can access the hard drive, databases, and the
network (Figure 15.1).
Figure 15.1 JavaScript running in browser vs via Node
Using Node, you can create anything from command-line tools to web servers. Over the next four chapters, you will use Node to help create a real-time chat application called Chattrbox (Figure 15.2).
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