Caja Playground (Figure 8-1) was developed by Google to test the cajoling process for scripts in a sandboxed environment. It can be accessed at http://caja.appspot.com/ and contains a number of predefined scripts and sites that can help a developer who’s just getting started with Caja.
Figure 8-1. The Caja Playground
This utility is the perfect tool for testing out script blocks in a safe environment prior to migrating over to a fully cajoled environment. You will be able to test out modular blocks of code or entire sites by cajoling them, testing the rendered output, and noting any associated errors or warnings that crop up during the process.