Thanks. I had zero background in javascript or CSS so started off with prompts like “Provide the full code for a magic mirror module in javascript that can add, edit, and delete events from my Google Calendar”. I did pay for the premium subscription, which gives you access to the more advanced models, which certainly helped. It returns both an initial module file and node_helper if needed. It was a very iterative process early on - the initial code would certainly have some errors in it, but I was able to get through it by pasting errors from the developer console back into Chat GPT and/or adding detailed logging statements to the code itself to see exactly what it was doing.
The most challenging part was getting the Google API set up correctly. I suspect Google changed some aspects after ChatGPTs cutoff date. In some cases, I was able to have it scan the developer docs to give me updated instructions.
Realized as well that I forgot an actual screenshot in my OP.