Test and debug JavaScript the easy way.

* Learn different techniques to test JavaScript, no matter how long or short your code might be.
* Discover the most important and free tools to help make your debugging task less painful.
* Discover how to test user interfaces that are controlled by JavaScript.
* Make use of free built-in browser features to quickly find out why your JavaScript code is not working, and most importantly, how to debug it.
* Automate your testing process using external testing tools.

In Detail

JavaScript is an important part of web development in today's Web 2.0 world. While there are many JavaScript frameworks in the market, learning to write, test, and debug JavaScript without the help of any framework will make you a better JavaScript developer. However, testing and debugging can be time consuming, tedious, and painful. This book will ease your woes by providing various testing strategies, advice, and tool guides that will make testing smooth and easy.

This book shows you the most essential features of JavaScript, which you will be using in your daily development, testing, and debugging tasks. You will learn to use the most basic functions of JavaScript to perform ad hoc testing quickly and efficiently.

This book is organized in an easy to follow, step-by-step tutorial style to maximize your learning. You will first learn about the different types of errors you will most often encounter as a JavaScript developer. You will also learn the most essential features of JavaScript through our easy to follow examples.As you go along, you will learn how to write better JavaScript code through validation. Learning how to write validated code alone will help you improve tremendously as a JavaScript developer and most importantly, to write JavaScript code that runs better, faster, and with less bugs.

As our JavaScript program gets larger, we need better ways of testing our JavaScript code. You will learn how to go about various testing concepts and how to use them in your test plan. After which, you will learn how to implement the test plan for your code. To accommodate more complex JavaScript code, you will learn more about the built-in features of JavaScript to identify and catch different types of JavaScript error. Such information helps to spot the root of the problem so that you can act on it.

Finally, you will learn how to make use of the built-in browser tools and other external tools to automate your testing process.

Learn how to test and debug JavaScript through example-driven tutorials.

What you will learn from this book

* Relationship between HTML, CSS, and JavaScript
* Different types of JavaScript error
* How to perform ad hoc testing
* How to validate your JavaScript code
* Different testing concepts
* Create a test plan and implement it
* How to test more complex code by using JavaScript's exception handling
* Learn how to test the user interface controlled by JavaScript
* How to debug your code using tools such as Google Chrome, Javascript Debugger, and Firefox's Venkman Extension.
* How to further automate your testing process using Sahi, Qunit, and JsLitmus
* Other testing tools that will make your testing process easier and less painful

Approach

This book is organized such that only the most essential information is provided to you in each chapter so as to maximize your learning. Examples and tutorials are given in an easy to follow, step-by-step manner so that you can see how the testing process is being carried out and how the code is being written. The source code also contains detailed explanation so that you know what the code is doing. Multiple screenshots are used in places that matter so that you have a visual sense of what is happening.

Who this book is written for

Beginner JavaScript developers looking for essential ways to write, test, and debug JavaScript for different purposes and situations.