AWS Contact Form tutorial not working

Question

I am trying to get this simple tutorial working here,  
https://aws.amazon.com/blogs/architecture/create-dynamic-contact-forms-for-s3-static-websites-using-aws-lambda-amazon-api-gateway-and-amazon-ses/  
  
but I'm getting an Uncaught ReferenceError: $ is not defined error referring to the jQuery block around this part.  
  
  if (!Namere.test($("#name-input").val())) {  
  
I did not add any other jQuery libs for the purpose of this exercise. Should I be doing so?  
  
I got my email address verified....I have not yet verified my domain name, but I would think I'd get a different error here?  
  
Any help or feedback would be appreciated.  
  
Thanks!

Answer

I think with the 2 links I added, I found the answer, AFAICT!

Answer

Actually, I may have figured it out. I had to re-enable CORS on the API Gateway resource, but also I noticed mention on StackOverflow about the following:  
  
https://stackoverflow.com/questions/2075337/uncaught-referenceerror-is-not-defined  
  
Indicating it simply needed SOME jQuery lib reference - didn't matter what apparently. I added that and it seems to have worked and gone through!

AWS Contact Form tutorial not working

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