Here is an example of a package I created. As of the time of this writing, npm is hosting over 210,000 modules, ranging from websites to command line tools to API wrappers. The public repository is open for anyone to download and publish code to. This is exactly why companies like IBM, Microsoft, and PayPal are using Node for their web services.
Now, he had to do a bit of custom configuration, but that doesn't make it any less impressive. For example, someone got it to handle 600,000 concurrent websocket connections, which is insane. This design is ideal for optimizing your code's throughput and scalability, which is a big reason for why it has become so popular. For some, this programming model can be a bit confusing at first, but it actually does a great job of simplifying development for heavy-IO applications, like websites. This means that as the program runs, the engine actually tracks its performance and makes the code faster based on certain factors that are tracked.Īs a runtime, Node's big focus is to use an event-driven, non-blocking IO model to make it lightweight and fast. To speed things up even more, the compiled code is optimized (and re-optimized) dynamically at runtime based on heuristics of the code's execution profile. The V8 engine does this by compiling the JavaScript to native machine code, which makes it much faster than an interpreter. This is really the heart of Node and is the component that actually parses and executes the code. Node is a server-side cross-platform runtime environment that runs on the V8 JavaScript engine, which powers Google's Chrome browser. Note that this guide will not teach you how to code, but instead it will guide you through the basics of the Node run-time and npm. I'll start with a short description of what Node actually is and what it's doing behind the curtain, then I'll give you some concrete examples that you can try yourself right in the browser, and finally I'll give you a bunch of resources to guide you through some more useful and practical examples/concepts. So what I'm aiming to do here is provide you with a guide that I had wish I had when just starting out. There are quite a few resources out there to learn Node.js, but not many of them really give you the background, tools, and resources you need to actually succeed at writing Node code. One of the most popular and easiest ways to write JavaScript is using Node.js. It can easily be run in your browser, on a server, on your desktop, or even on your phone as an app. JavaScript is undoubtedly one of the most popular programming languages out there today, and for good reason.
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