Conventions

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

Code words in text are shown as follows: " In order to create the server we need the http module."

A block of code is set as follows:

    var http = require('http');
        http.createServer(function (request, response) {
        response.writeHead(200, {'Content-Type': 'text/html'}); 
        response.end('Woohoo!');
        }).listen(8080);

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

      var http = require('http');
        var path = require('path'); 
        http.createServer(function (request, response) {
        var lookup=path.basename(decodeURI(request.url)); 

Any command-line input or output is written as follows:

sudo npm -g install express 

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "We could make it possible for a hypothetical user to indicate if they were inspired by a quote, such as a Like button."