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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
The WebGPU samples you pointed out are a good resource, but this article is a decent introduction to GPU compute and should be up to date [1].
[1] https://github.com/GoogleChrome/web.dev/pull/7827
I think WebDNN[0] is working on enabling this sort of thing using WebGPU compute as a backend, but no experience with ML myself sorry. I do think WebGPU's compute API would be sufficient for ML inference, but can't say for sure.
[0] https://mil-tokyo.github.io/webdnn/