Before starting Chapter 2, The JavaScript Asynchronous Model, you must need a set of prerequisite concepts that will make you better understand where to use Promises.js, and how it can save your time and effort in your recent or upcoming projects. The following section will elaborate what these concepts are and how we will use these as a base for our understanding of promise.
The prerequisite of this book is that you have a good understanding of procedural programing and a compulsory knowledge of basic JavaScript. Since this book is designed to develop a deeper knowledge of a concept (promise) and its use in different technologies, it's also imperative that you have a very good understanding of HTML and how to embed the code for your need.
An understanding of basic programming will help you begin with experiments with the help of a sample code as soon as you are done with any chapter/section. In this book, I've tried to make every section self-explanatory and every sample of code as a standalone script/program up to maximum strength. However, where there was need, we've added a snippet of code or algorithm to present our point more clearly.
To use the code within this book, you don't need any extra piece of software/IDE to start. To sample the code provided in this book, you only need free software/IDE such as Notepad++ or any other preferred open source GPL or GNU product.
Also, to view the result of your code, you need a web browser such as Google's Chrome or Mozilla's Firefox. For some examples related to Microsoft technologies, you will need Internet Explorer 9 or higher.