To run this recipe, we will need a script that loads a web page, and also scripts that will be loaded by that script to use within the web page context.

The script in this recipe is available in the downloadable code repository as recipe05.js under chapter03. If we run the provided example script, we must change into the root directory for the book's sample code. Also, for this example to work, we will need an Internet connection.

Lastly, the script in this recipe runs against the demo site that is included with the cookbook's sample code repository. To run that demo site, we must have Node.js installed. In a separate terminal, change into the phantomjs-sandbox directory (in the sample code's directory), and start the app with the following command:

node app.js