I am developing a MS office add-in for Word. The test version is working fine on Word for Windows, but fails on Office for Mac. 

On Office for Mac, the add-in loads as it is supposed to, but whenever I try to click a button that executes a JS script that calls on a php web service that communicates with a MySQL database, nothing happens. 

I don't get any error messages, so I am looking for advice on how to debug the add-in on a mac. What tools can I use?

For background, I have tried 

1. The Vorlon.js guidance here:
<https://blogs.msdn.microsoft.com/mim/2016/02/18/vorlonjs-plugin-for-debugging-office-addin/>

But it does not seem to work. The problem might be that I am not very familiar with Git, and following the instructions literally might not work.

2. I have also tried loading the add-in directly in Chrome, and using the Dev tools. This does not work because the add-in depends on an API that it can only access when it is launched via Word.