20NODE.JS
So far, we’ve used the JavaScript language in a single environment: the browser. This chapter and the next briefly introduce Node.js, a program that allows you to apply your JavaScript skills outside of the browser. With Node.js, you can build anything from small command line tools to HTTP servers that power dynamic websites.
These chapters aim to teach you the main concepts that Node.js uses and to give you enough information to write useful programs for it. They do not try to be a complete, or even a thorough, treatment of the platform.
If you want to follow along and run the code in this chapter, you’ll need to install Node.js version 10.1 or higher. To do so, go to https://nodejs.org and follow the installation instructions for ...
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