In this chapter, we've learned how to capture different errors that PhantomJS can trigger and how to handle them. It is always a good programming practice to handle all errors in specific events practically, so that we can do more or alert our users more about the problems they might encounter. In the next chapter, we will explore PhantomJS's features to capture and save screenshots of the page we've opened. This feature can be used in a variety of ways and can also be of use in debugging the pages when errors occur by taking a snapshot of that page.
Getting Started with PhantomJS
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Getting Started with PhantomJS
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Overview of this book
PhantomJS is a headless WebKit browser with JavaScript API that allows you to create new ways to automate web testing. PhantomJS is currently being used by a large number of users to help them integrate headless web testing into their development processes. It also gives you developers a new framework to create web-based applications, from simple web manipulation to performance measurement and monitoring.A step step-by by-step guide that will help you develop new tools for solving web and testing problems in an effective and quick way. The book will teach you how to use and maximize PhantomJS to develop new tools for web scrapping, web performance measurement and monitoring, and headless web testing. This book will help you understand PhantomJS’ scripting API capabilities and strengths.This book starts by looking at PhantomJS’ JavaScript API, features, and basic execution of scripts. Throughout the book, you will learn details to help you write scripts to manipulate web documents and fully create a web scrapping tool.Through its practical approach, this book strives to teach you by example, where each chapter focuses on the common and practical usage of PhantomJS, and how to extract meaningful information from the web and other services.By the end of the book, you will have acquired the skills to enable you to use PhantomJS for web testing, as well as learning the basics of Jasmine, and how it can be used with PhantomJS.
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Getting Started with PhantomJS
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Table of Contents (13 chapters)
Preface
Free Chapter
1. Getting Started
2. Manipulating Page Content
3. Handling Events and Callbacks
4. Capturing Errors
5. Grabbing Pages
6. Accessing Location-based Services
7. Working with Files
9. External JavaScript
10. Testing with PhantomJS
11. Maximizing PhantomJS
Index
Customer Reviews