To get the application:
You'll need to update it to match your server location and Auth Token, as described here.
First, a bit of background. When you create your project (here called
Using this, update the app as shown below:
You can run this directly from the file system:
This app should look as shown below. Explore the various Use Cases, such as changing Line Items, adding Orders, etc. To keep it simple, all changes are immediate - there is no save button.
When you make a change, you will see the transaction log (right side of screen, labelled Logic Execution Plan). You can see the same log in your log screen, which you'll find useful for debugging your own applications.