Credit card issue

I can’t use connect-api-examples/index.php at master · square/connect-api-examples · GitHub, because it requires autoload.php which I don’t have which means I most likely have to use some type of composer which I can’t use.

I already have the SDK files uploaded to my webserver from years ago and it seems to be working so I’m going to continue using that. I just right now need a SIMPLE html + js on client side for the form, which I thought I could use web-payments-quickstart/card.html at main · square/web-payments-quickstart · GitHub.

Is there a place I can just find a simple HTML and JS for ONLY the client side that displays the credit card form?
All the other stuff that is handled in PHP I can figure out on my own. I’m just trying to first fix the client side without having to use a SDK etc.
Thank you so much.