Show me the code!
Node.js is a JavaScript runtime built on Chrome’s V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. Node.js’ package ecosystem, npm, is the largest ecosystem of open source libraries in the world.
Content interpolated with bracket syntax will be evaluated for code, the output of which is included in your HTML output.
Further to our previous tutorial, sometimes it may be necessary to nest HTML tags inside of each other. Element interpolation with Pug is done in a syntax similar to variable interpolation; square brackets instead of curly braces are used here.
Clean and organized HTML is what Front-end Developers always aim for. Well with Pug (formerly known as “Jade” ), a high performance and feature-rich templating engine, that’s easy to achieve. Simply put, Pug is a clean, white space/indentation sensitive syntax for writing html.
You can open a file for reading or writing using fs.open()method.
Node package manager, or npm, helps you discover, share, and use code, along with managing dependencies.
Every action on a computer is an event. Like when a connection is made or a file is opened, for example. Node.js is perfect for event-driven applications because objects in Node.js can fire events, like the readStream object fires events when opening and closing a file.
WordPress uses an XML-RPC interface by default. XML-RPC is a remote procedure call (RPC) protocol which uses XML to encode its calls and HTTP as a transport mechanism. With WordPress XML-RPC support, you can post to your WordPress blog using many popular clients. You could even consider writing your own client application using Node.js. Let’s do a proof of concept.
In this tutorial we will be creating a very simple Node application, that will allow users to input data that they want to store in a MongoDB database. You can use the the existing template in XenServer to launch a Linux machine with Node.js and MongoDB pre-installed.
Now that Node.js server is available as a template via Xen Orchestra it’s time to look at some of the cooler stuff you can do with Node.js. Here are instructions for how to build your own online Random Password Generator.
This is how you would script “Hello World” in Node.js
// requiring the HTTP interfaces in node var http = require('http'); // create an http server to handle requests and response http.createServer(function (req, res) { // sending a response header of 200 OK res.writeHead(200, {'Content-Type': 'text/plain'}); // print out Hello World res.end('Hello World\n'); // use port 8080 }).listen(8080); console.log('Server running on port 8080.');