Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, folder names, filenames, file extensions, pathnames, dummy URLs, and user input are shown as follows: "We can include Socket.IO by using the require('socket.io') statement."

A block of code is set as follows:

var io = require('socket.io');

io.on('connection', function (socket) {
     socket.emit('connected');
});

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "For this example we will use Redis to propagate our state across servers."