Book Image

The JavaScript Workshop

By : Joseph Labrecque, Jahred Love, Daniel Rosenbaum, Nick Turner, Gaurav Mehla, Alonzo L. Hosford, Florian Sloot, Philip Kirkbride
Book Image

The JavaScript Workshop

By: Joseph Labrecque, Jahred Love, Daniel Rosenbaum, Nick Turner, Gaurav Mehla, Alonzo L. Hosford, Florian Sloot, Philip Kirkbride

Overview of this book

If you're looking for a programming language to develop flexible and efficient apps, JavaScript is a great choice. However, while offering real benefits, the complexity of the entire JavaScript ecosystem can be overwhelming. This Workshop is a smarter way to learn JavaScript. It is specifically designed to cut through the noise and help build your JavaScript skills from scratch, while sparking your interest with engaging activities and clear explanations. Starting with explanations of JavaScript's fundamental programming concepts, this book will introduce the key tools, libraries and frameworks that programmers use in everyday development. You will then move on and see how to handle data, control the flow of information in an application, and create custom events. You'll explore the differences between client-side and server-side JavaScript, and expand your knowledge further by studying the different JavaScript development paradigms, including object-oriented and functional programming. By the end of this JavaScript book, you'll have the confidence and skills to tackle real-world JavaScript development problems that reflect the emerging requirements of the modern web.
Table of Contents (17 chapters)

HTTP

http is the most important module of Node.js. It helps you to spin up a server that will listen to one specific port. It will let you transfer information over Hypertext Transfer Protocol (HTTP).

The createServer function takes one function as a parameter, which will be called when you make any request to the server. That function has two parameters: req and res. The first, the request parameter, is a stream that holds all the details of the request. For instance, if you are using a POST request to submit a form, then this object will hold all the values in it. The response parameter is also a stream, and you can use it to update the response header, status, and more:

res.writeHead(200, {'Content-Type': 'application/json'});

Here, you are updating one key in the header and writing the status code as 200, which is "OK." The difference between a parameter and a query is highlighted in the following figure:

Figure...